operation manual

operation manual
Powered Subwoofer System
OPERATION MANUAL
KEN KREISEL
DXD-808 and DXD-12012
Push-Pull-Pulsar Powered Subwoofers
Copyright © 2013 Ken Kreisel
●
www.kreiselsound.com
IMPORTANT SAFETY INSTRUCTIONS
CAUTION!
RISK OF ELECTRIC SHOCK
DO NOT OPEN
USE IN DRY LOCATIONS ONLY
The lighting flash with arrowhead symbol,
within an equilateral triangle, is intended
to alert the user to the presence of
uninsulated "dangerous voltage" within
the product's enclosure that may be of
sufficient magnitude to constitute a risk
of electric shock to persons.
CAUTION:
TO PREVENT THE RISK OF
ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
The exclamation point symbol, within an
equilateral triangle, is intended to alert the
user to the presence of important operating
and maintenance (servicing) instructions in
the literature accompanying the product.
1. READ INSTRUCTIONS - All safety and operating instructions should be read before this product is operated.
2. RETAIN INSTRUCTIONS - The safety and operating instructions should be retained for future reference.
3. HEED WARNINGS - All warnings on this product and in the operating instructions should be adhered to.
4. FOLLOW INSTRUCTIONS - All operating and use instructions should be followed.
5.
WATER & MOISTURE - Do not use this product near water - for example, near a bathtub, washbowl, kitchen sink, laundry
tub, in a wet basement, near a swimming pool, or the like.
6. ATTACHMENTS - Do not use any attachments not recommended by the product manufacturer as they may cause
hazards.
7. ACCESSORIES - Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may fall,
causing serious injury to a child or adult, and serious damage to the product. Use only with accessories recommended
by the manufacturer.
8. WALL or CEILING MOUNTING - This product should be mounted to a wall or ceiling only as recommended bythe
manufacturer.
9.
VENTILATION - This product should be situated so that its location or position does not interfere with its proper ventilation.
For example, this product should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation
openings; or placed in a built-in installation such as a bookcase or cabinet that may impede the flow of air through the
ventilation openings.
10. HEAT - This product should be situated away from heat sources such as radiators, heat registers, stoves, or other
equipment that produce heat.
11. POWER SOURCE - This product should be operated only from the type of power source indicated on the marking label.
If you are unsure of the type of power supply to your home, consult your product dealer or local power company.
12. POWER CORD PROTECTION - Power-supply cords should be routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and
the point at which they exit from the subwoofer.
13. CAUTION: To prevent electric shock, match wide blade of power plug to wide slot of receptacle and fully insert.
14. OVERLOADING - Do not overload wall outlets, extension cords, or integral convenience receptacles as this can result in
a risk of fire or electric shock.
15. CLEANING - This product should be cleaned only as recommended by the manufacturer.
16. NONUSE PERIODS - The power cord of the subwoofer should be unplugged from the outlet when left unused for a long
period of time.
17. OBJECT & LIQUID ENTRY - Care should be taken so that objects do not fall and liquids are not spilled onto the enclosure.
18. DAMAGE REQUIRING SERVICE - The subwoofer should be serviced by qualified service personnel when:
a. The power-supply cord or plug has been damaged.
b. Objects have fallen or liquid has been spilled into the subwoofer.
c.
The subwoofer has been exposed to rain.
d. The subwoofer does not appear to operate normally or exhibits a marked change in performance.
e. The subwoofer has been dropped or damaged.
19. SERVICING - Do not attempt to service the product yourself, beyond what is described in these operating instructions.
20. REPLACEMENT PARTS - When replacement parts are required, be sure the service technician has used replacement
parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions
may result in fire, electric shock, or other hazards.
21. SAFETY CHECK - Upon completion of any service or service of repairs to this product, ask the service technician to
perform safety checks to determine that the product is in proper operating condition. All other servicing should be referred
to qualified service personnel.
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
CONTENTS
INTRODUCTION ..............................................................................................................................1
PRODUCT FEATURES ...................................................................................................................... 2
BEFORE YOU BEGIN ......................................................................................................................... 2
CABLES ........................................................................................................................................... 3
CONNECTIONS & CONTROLS ........................................................................................................... 3
PLACEMENT .................................................................................................................................... 5
INSTALLATION-HomeTheaterSystemUsingUnbalancedRCA........................................................7
INSTALLATION-MusicSystemUsingUnbalancedRCA's...................................................................9
INSTALLATION - Home Theater System Using Balanced XLR ......................................................... 11
INSTALLATION - DUO/QUATTRO ................................................................................................... 13
CALIBRATION ............................................................................................................................. 16
PROTECTION CIRCUITRY ............................................................................................................. 18
CARE OF YOUR SUBWOOFER ....................................................................................................... 18
TROUBLESHOOTING & SERVICE .................................................................................................. 19
SPECIFICATIONS ......................................................................................................................... 20
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
INTRODUCTION
Congratulations on your purchase of a KEN KREISEL subwoofer. This product represents the state-of-the-art in
subwoofer performance and will provide you with years of listening pleasure when properly setup and cared
for. We strongly urge you to read this owner's manual and follow the instructions provided to help you obtain
maximum system performance.
PRIOR TO INSTALLATION
Please unpack the system carefully. This unit is heavy. Use caution when lifting or moving to avoid injury. Save
the carton and all packaging materials for future use. Packing this unit in any other carton may result in damage
when shipping that is not covered by the warranty. Fill out and return the warranty card to complete your product
registration and record the serial number and purchase information in the space provided for your own records.
OPERATING ENVIRONMENT
Operating environment temperature 40°F to 95°F (4°C to 35°C) with less than 85% relative humidity. Do not
install this product in a poorly ventilated area, or in locations exposed to high humidity, direct sunlight, or strong
artificial light.
VENTILATION REQUIREMENTS
This product contains electronics that generate heat whenever powered. When installing this product, make sure
to leave adequate space around the unit for proper ventilation to prevent excessive operating temperature. A
minimum of 2" (50mm) clearance from all sides is suggested.
WARNING!
This equipment is not waterproof. To prevent a fire or shock hazard, do not expose this equipment to rain, moisture
or any liquids. Do not place a container filled with liquid on or near this equipment (such as a drink or flower vase).
To prevent a fire hazard, do not place an open flame (such as a lighted candle) on this product. To avoid electrical
shock, do not open speaker enclosure or amp chassis cover. Please observe all warnings on the equipment itself.
There are no user serviceable parts inside. Please refer all service questions to your authorized dealer.
CAUTION!
The standby function of this product will not completely shut off all power consumption from the AC outlet.
Therefore, make sure this product is installed so that the main power switch is accessible. To avoid fire hazard,
the AC power should be disconnected if the product is left unused for a long period of time (for example, when
on vacation).
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
PRODUCT FEATURES
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ubwoofer
Magnetically shielded for video use (20 oz. bucking magnet on 8" and 34 oz. on 12")
FEA optimized motor structure including shorting ring for low distortion
"Silent Running" Suspension (spider) provides linear travelat highexcursion for low distortion
High excursion ultralinear rubber surround
High efficiency dual mono-block class Damplifier optimized for low distortion & highimpact deep bass
High
monoblock amp design: 750+ w
RMS continuous/1250+ watts peak
Line-level unbalanced (RCA), and balanced instrumentation type (XLR) inputs
Balanced XLR pass through (direct pass thru,unbuffered)
RCA signal sensingAUTO
(defeatable), XLR input requires ALWAYS ON
Variable volume control with
preset position
Variable phase control (0° to 180°)
Adjustable (40 to 160Hz) low-pass filter (12dB/octave, with
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Output maximizer circuit provides maximum clean sound output, and prevents driver over
excursion, amp clipping, and excessive distortion
Designed for optimum performance & frequency response when placed in the corner closest to the listening position
Typical in-room frequency esponse of Hz-250Hz (DXD-808) and Hz-250Hz (DXD-12012)
BEFORE YOU BEGIN
Your new subwoofer provides for a number of installation options. Read all the installation information contained
within this manual in order to determine which installation option is best for your system configuration.
When using a surround sound processor or receiver, be sure to set all controls to their GREEN DOT position to insure
optimum performance. When using the XLR input be sure the ALWAYS ON power mode switch position is selected.
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Select appropriate AC Power source for subwoofer. Do NOT plug the power cord of the subwoofer into the
switched outlet of a receiver or other piece of equipment. The power cord should be plugged directly into an
AC outlet. Never simultaneously switch-on two or more DXD's with a common power switch.
NOTE: the AC powerline voltage varies according to country or region. Be sure that the AC power
of the area where the unit will be installed matches the required voltage (e.g., 120VAC or 230VAC)
indicated on the subwoofer's rear amplifier panel.
Select appropriate signal connection type (XLR or RCA signal cable) to match your equipment
Determine optimum subwoofer mounting location, which normally is the closest corner to where you sit
Obtain any appropriate mounting hardware (i.e. accessory bracket kits for multiple subwoofer use in
Duo/Quattro systems)
Determine system configuration (e.g. music or surround sound system type for proper equipment
settings & calibration)
NOTE: Consult your dealer or www.kreiselsound.com for optional accessories that may be required to properly
complete your system installation.
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
CABLES
When installing your new subwoofer using unbalanced RCA connections, you should use high quality shielded
phono cables. Poor quality cables may pickup interference and result in hum or noise. Keep the length of cable
as short as possible and route all input signal cables away from power cables to reduce the potential for induced
hum and noise.
When using the balanced XLR connections, be certain to use a high quality cable that maintains proper
connections to each pin, including the ground conductor. If an XLR cable that is improperly wired is used,
subwoofer performance may be degraded and you may experiance increased noise and/or hum. Due to various
design differences between different brands & types of equipment (e.g. different ground methods for power
supplies and signal reference) and long cables required in some installations, there is a potential for any product
to pickup noise via the connections and/or connected equipment (via ground loops). If you have audible hum/
buzz after completing your subwoofer connections, you may need to modify your equipment's cables, routing,
or connection methods (power line connections and/or signal cables). Visit our web site www.kreiselsound.com
for upcoming low noise XLR cables and RCA to XLR adapter cables which may benefit your system setup.
CONNECTIONS & CONTROLS (see Figures 1a & 1b)
XLR Balanced Input [1]
Professional instrumentation type balanced XLR input. Note: XLR & RCA inputs are electronically summed together.
XLR Direct Pass-Thru (XLR Output) [2]
Balanced XLR direct passive pass through (unbuffered)
RCA Input [3]
Consumer style unbalanced RCA inputs. Note: RCA & XLR inputs are electronically summed together.
Variable Low-pass Filter: 40Hz to 160Hz [4]
This control allows you to adjust the upper limit of the subwoofer's frequency response from 40 to 160Hz. The
subwoofer's output level will be reduced above the frequency this control is set to. You should set the crossover
frequency to obtain a smooth and seamless transition from the subwoofer to the main speakers in your system.
If your main speakers are smaller units with limited low frequency output, start with a higher frequency (such as
100-120Hz). With larger speakers that have greater low frequency output, you might start with this control set
lower (such as 80-100Hz). If you are using a surround receiver or processor, be sure to set the DXD's LOW-PASS FILTER
switch to its BYPASS (OFF) position which will totally bypass this VARIABLE LOW-PASS FILTER for optimum sound.
Variable Phase - 0° to 180° [5]
This control allows you to alter the phase of the subwoofer's output signal up to 180° to correct for a possible
mismatch and resulting cancellation between the subwoofer and your main speakers/amplifier. To adjust, listen
to the system with music playing and rotate the knob from 0 to 180 and listen for a change in low frequency
output. The correct position will have a greater amount of apparent low frequency output.
BASS LEVEL [6]
This control allows you to adjust the output level of the subwoofer to match the main speakers in your system.
For
surround sound
processors, set the
to the
"REFERENCE LEVEL"
position indicated by the
.The"REFERENCE LEVEL" position is calibrated to work with mostsurround
sound systems once the receiver/processor levels are properly adjusted. For
systems, start with the
at a low setting (e.g., -6dB) and proceed slowly from there until levels match. Use of test tones (from
a receiver or processor's built-in
function or test disc) and SPL meter are suggested for proper level
matching of all speakers and your DXD subwoofer. Auto-calibration is available with many receivers.
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
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5
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Figure 1a. Signal Connections & Controls (DXD-12012 shown)
Low Pass Filter Switch: LOW-PASS FILTER ON or BYPASS (OFF) [7]
This switch bypasses the subwoofer's built in electronic crossover circuitry from the signal path. This is required in
installations which utilize a crossover external to the subwoofer, such as most home theater receivers/processors.
When using a
receiver/processor, set this switch to "BYPASS (OFF)" to turn-off the subwoofer's built in
crossover. For stereo system installations which do not have an electronic crossover, we recommend you set this
switch to "ON" as the internal crossover will improve performance if you do not have an external crossover.
Auto Turn ON Switch - AUTO ON/OFF or ALWAYS ON [8]
With this function in the "AUTO ON/OFF" position, your subwoofer can be safely left with the main power switch
on continuously. The subwoofer will turn itself on automatically when an audio signal is present. If no signal is
present for approximately 12 minutes, the unit will switch to standby mode (indicated by red power LED color) .
While in standby mode, your subwoofer will draw very minimal power. This function can be disabled by setting
this switch to the "ALWAYS ON" position. Note, the AUTO ON/OFF function operates only in conjunction with the
RCA inputs. The XLR input requires that this switch be set to the ALWAYS ON position when operating.
Power Indicator Light [9]
This LED indicates the operating mode of the subwoofer. Green indicates normal "ON" operation. Red indicates
the subwoofer is in a low power "standby" mode.
Power Switch [10]
The master power switch is located on the lower half of the unit. This rocker style switch is the main on/off for
the unit. This switch should be set to position 1 (up) for on, and 0 (down) for off. If the unit is to be left unused
for an extended period of time (e.g. when you are away on vacation), the master power switch should be turned
off, or the mains power cord disconnected.
AC Power Cord Inlet [11]
AC inlet power socket (IEC C18 style), mates to standard IEC C17 power cord (no earth ground).
10
11
FUSE
5x20mm
250VAC
8A
FAST BLO
Figure 1b. Power Connection & Switch
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
PLACEMENT
While true subwoofers operate at extremely low frequencies which are primarily omni-directional, keep in mind
that frequency response and output level can be dramatically influenced by where you place the subwoofer
within the room. Placing the subwoofer in the wrong location may degrade sound quality, limit low frequency
response and reduce maximum output level, substantially reducing your overall listening pleasure. Many
rooms often end up with non-optimal placement, depending on the size and location of the furnishings within
your room and if the possibility to reposition them exists. Finding the optimal location usually requires some
experimentation to determine what sounds best in your room, from your listening position. We suggest you read
the general guidelines below and setup the subwoofer in one of the suggested locations. Proceed to listen to
the subwoofer multiple times, with it placed in a few different locations before settling on the final location. To
do this, perform basic setup and listen to a familiar music track or movie scene. Then move the subwoofer to an
alternate location & repeat listening to the same music track or movie scene. If you have a test CD and SPL meter
(or other measurement equipment), performing a basic frequency response test can help you determine which
location provides the best frequency response. A test CD with various low bass frequencies can be used along with
an inexpensive handheld SPL meter to determine frequency response differences from one location to another.
General Guidelines
In most rooms the optimum DXD location is the closest front or rear corner (e.g., without a door or opening
nearby - see Figure 2) to where you sit. This location typically offers the best bass impact with the deepest low
frequency extension. The worst location for a subwoofer is far away from walls, near the center of your room
(see Figure 2). Avoid central room locations whenever possible. When using a pair of subwoofers in stereo, it is
preferable to place each subwoofer on a wall/corner near the satellite of the same channel.
This subwoofer includes magnetic shielding to reduce the amount of stray magnetic energy emitted from the
speaker's motor structure. This allows greater flexibility when placing the unit as there is less stray magnetism
that may affect other nearby devices. If any nearby equipment is sensitive to magnetism and operates abnormally
after installing your subwoofer, increase the distance between the subwoofer and such equipment until normal
operation is returned. Flat screen TV displays are not sensitive to magnetic fields.
CAUTION:
1. This subwoofer has electronics built into the cabinet and must be properly ventilated.
2. Do not place the rear of cabinet against a wall, you must allow room for adequate ventilation of the amplifier
(at least 2 inches).
3. Do not place the subwoofer next to heat sources, such as furnace registers, radiators, etc.
4. Do not place the subwoofer near sources of excessive moisture, such as evaporative coolers,
humidifiers, etc.
5. The power cord should be routed in such a way that it will not be walked on, pinched, cut, or compressed
in any way that could result in damaging the insulation or wire. Damage to the power cord may result in
a shock or fire hazard.
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
Optional: cabinet may be rotated
90° to face side driver towards wall
Gray shaded areas indicate
preferred locations to
place the subwoofer
X
Central room locations
(e.g. within this shaded area)
are not recommended
for subwoofer placement
Optional: cabinet may be rotated
90° to face side driver towards wall
Figure 2. Subwoofer Placement
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
INSTALLATION
Home Theater System Using Unbalanced RCA
All connections for the subwoofer are located on the rear of the unit. Figure 3 illustrates connection to a typical
home theater receiver or processor with preamp level subwoofer output. Utilizing this method, the receiver or
processor is the main control center for the system and it provides all the bass management (e.g. sending the
low frequency signals from the satellite speaker channels & LFE for movies, to the subwoofer), and it provides a
low-pass filtered signal (bass information only) to the subwoofer.
Most home theater receivers/processors have 1 "SUBWOOFER" output jack. For this type of equipment, connect
a single high quality shielded RCA cable from your receiver's "SUBWOOFER" output jack to the subwoofer's input
RCA marked with a green dot.
If your receiver or processor has multiple subwoofer outputs, you may have additional connection options.
Consult the owner's manual for your receiver/processor to verify if these outputs are all the same. In most cases,
you may use either of these outputs, and use a single high quality shielded RCA cable to connect one of your
receiver/processor "SUBWOOFER" output jacks to the subwoofer's input RCA marked with a
(same as
above). You may also connect 2 RCA cables (regular stereo pair) to both "SUBWOOFER" output jacks from your
receiver/processor to both RCA inputs on the
subwoofer, but it is not recommended.
Home Theater
System (utilizing receiver/processor with internal crossover):
● Set crossover bypass switch to "BYPASS (OFF)" (indicated by GREEN DOT)
● The "VARIABLE LOW-PASS FILTER" frequency control knob has no effect when above switch is set to
"BYPASS (OFF)"
●
the "BASS LEVEL" knob
to the "REFERENCE LEVEL" until you hear & feel a click
● Set the "VARIABLE PHASE" control knob to "0" (indicated by GREEN DOT)
NOTE:
GREEN DOTS indicate the correct control settings for most home theater systems with a receiver/processor that
performs your bass management (including low-pass filter). Start with the controls set to the green dots & consult
the owner's manual for your receiver/processor and perform a level calibration, to balance the output level for
all speakers, including subwoofer.
MULTIPLE SUBWOOFERS - DUO/QUATTRO SYSTEM
When connecting multiple subwoofers (e.g. Duo or Quattro system) using RCA signal connections, you will need
to use "Y" cables (signal splitters) to route your receiver/processor output to each woofer (see Figure 7). Another
option is to use an XLR to RCA adapter to convert your receiver/processor signal ouput typeto an XLR connection,
which allows you to use the XLR "DIRECT PASS-THRU" (see Figures 5 & 6 for XLR wiring). Visit our web site at www.
kreiselsound.com for upcoming cables & accessories that may benefit your system installation.
NOTE:
When using multiple subwoofers, it is critical that the controls/adjustments are set the same on every subwoofer for
proper audio performance. Volume, phase, and crossover (including bypass) must all be set to identical (reference)
positions indicated by the green dots or sound quality & output may be reduced. When using multiple subwoofers,
their input load is in parallel, which places greater load on your receiver/processor. Some equipment with high
output impedance may not be able to sufficiently drive multiple subwoofers & may require a line driver/buffer.
CAUTION!
To reduce risk of shock or damage, connect AC power cord after all other connections have been completed.
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
HOME THEATER RECEIVER OR PROCESSOR
WITH PREAMP SUBWOOFER OUT (RCA)
PREAMP OUTPUTS
SUBWOOFER
FUSE
5x20mm
250VAC
8A
FAST-BLO
Set crossover “LOW-PASS FILTER” switch to “BYPASS (OFF)”
when used in home theater system with a surround sound
receiver/processor utilizing a built in crossover.
C
AC power cord
Figure 3. Home Theater Installation Using Unbalanced RCA Input
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
INSTALLATION
Music System Using Unbalanced RCA's
All connections for the subwoofer are located on the rear of the unit. Figure 4 illustrates connection to a typical
music preamp with stereo full range output. Utilizing this method, the preamp provides a full range signal from
both left & right audio channels to the subwoofer. If your preamp does not offer an internal crossover or bass
management functions, the subwoofer's built in controls will need to be properly set to blend the subwoofer
output with the satellite speakers.
Full Range Output (music) vs Home Theater Use (subwoofer output)
This subwoofer is designed to operate from either a full range audio signal (when using the subwoofer's builtin crossover) or home theater (surround sound) processor/receiver with a "SUBWOOFER" output jack and built
in low-pass filter & bass management. In both cases, proper control settings are required to achieve optimal
system performance.
Music System (without external crossover):
● Set crossover bypass switch to "LOW-PASS FILTER ON"
● Adjust the "VARIABLE LOW-PASS FILTER" frequency control knob to blend the subwoofer
output seamlessly with your main speakers
● Adjust the "BASS LEVEL" control knob to match the output level of the subwoofer to
your main speakers
● Adjust the "VARIABLE PHASE" control knob to smoothly blend the output of the
subwoofer to your main speakers (refer to the section on system Calibration for further information)
MULTIPLE SUBWOOFERS - DUO/QUATTRO SYSTEM
When connecting multiple subwoofers (e.g. Duo or Quattro system) using RCA signal connections, you will need
to use "Y" cables (signal splitters) to route your receiver/processor output to each woofer. Another option is to use
an XLR to RCA adapter to convert your receiver/processor signal output typeto an XLR connection, whichallows
you to use the XLR "DIRECT PASS-THRU" (see Figures 5 & 6 for XLR wiring). Visit our web site at www.kreiselsound.
com for upcoming cables & accessories that may benefit your system installation.
NOTE:
When using multiple subwoofers, it is critical that the controls/adjustments are set the same on every subwoofer for
proper audio performance. Volume, phase, and crossover (including bypass) must all be set to identical (reference)
positions indicated by the green dots or sound quality & output may be reduced. When using multiple subwoofers,
their input load is in parallel, which places greater load on your receiver/processor. Some equipment with high
output impedance may not be able to sufficiently drive multiple subwoofers & may require a line driver/buffer.
CAUTION!
To reduce risk of shock or damage, connect AC power cord after all other connections have been completed. Do
NOT plug the power cord of the subwoofer into the switched outlet of a receiver or other piece of equipment. The
power cord should be plugged directly into an AC outlet.
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
MUSIC SYSTEM PREAMP
WITH FULL RANGE OUT (RCA)
PREAMP OUTPUTS
L/R
FUSE
5x20mm
250VAC
8A
FAST-BLO
Set crossover “LOW-PASS FILTER” switch to “ON”
and adjust “VARIABLE LOW-PASS FILTER”
when used in a system without external crossover.
AC power cord
Figure 4. Music System Installation Using Unbalanced RCA Inputs
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Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
INSTALLATION
Home Theater System Using Balanced XLR
All connections for the subwoofer are located on the rear of the unit. Figure 5 illustrates connection to a high
end home theater preamp/processor with XLR subwoofer output.
Utilizing this method, the receiver or processor is the main control center for the system and it provides all the
bass management (e.g. sending the low frequency signals from the satellite speaker channels & LFE channel, to
the subwoofer), and it provides the low-pass filter for the subwoofer.
Home Theater Surround System (withsurround receiver/processor with internal crossover):
● Set auto on/off switch to "ALWAYS ON"
● Set crossover bypass switch to "BYPASS (OFF)" (indicated by GREEN DOT)
● The "VARIABLE LOW-PASS FILTER" frequency control knob has no effect when above switch
is set to "BYPASS (OFF)"
● Adjust the "BASS LEVEL" control knob to the "REFERENCE LEVEL" setting (indicated
by GREEN DOT)
● Set the "VARIABLE PHASE" control knob to "0" (indicated by GREEN DOT)
NOTE:
GREEN DOTS indicate the correct control settings for most home theater systems with a receiver/processor that
performs your bass management (including low-pass filter). Start with the controls set to the green dots (except
for the auto on/off when using XLR input) and consult the owner's manual for your receiver/processor and perform
a level calibration, to balance the output level for all speakers, including subwoofer.
MULTIPLE SUBWOOFERS - DUO/QUATTRO SYSTEM
When connecting multiple subwoofers (e.g. Duo or Quattro system) using XLR signal connections, you may wish
to use the XLR "DIRECT PASS-THRU" output connection to simplify your installation (see Figures 5 and 6). This will
allow you to run 1 long XLR cable from your processor's "SUBWOOFER" output jack to the 1st subwoofer's XLR
input, and an additional short XLR cable connects the 1st subwoofer's XLR "DIRECT PASS-THRU" output to the
input of the 2nd subwoofer in the signal chain (see Figure 5). If installing a Quattro system, additional short XLR
cables can be used to connect the "XLR DIRECT PASS-THRU" output of the 2nd subwoofer to XLR input of the 3rd
subwoofer, and another short XLR cable to connect the "XLR DIRECT PASS-THRU" output of the 3rd subwoofer
to XLR input of the 4th subwoofer. If your processor does not provide an XLR output, you may use an RCA to XLR
adapter cable to connect your receiver to the 1st subwoofer in a Duo/Quattro system, and use regular XLR cables
to make the connections between additional subwoofers, as noted above. Visit our web site at www.kreiselsound.
com for upcoming cables & accessories that may benefit your system installation.
NOTE:
When using multiple subwoofers, it is critical that the controls/adjustments are set the same on every subwoofer for
proper audio performance. Volume, phase, and crossover (including bypass) must all be set to identical (reference)
positions indicated by the GREEN DOT or sound quality & output may be reduced. When using multiple subwoofers,
their input load is in parallel, which places greater load on your receiver/processor. Some equipment with high
output impedance may not be able to sufficiently drive multiple subwoofers & may require a line driver/buffer.
CAUTION!
To reduce risk of shock or damage, connect AC power cord after all other connections have been completed. Do
NOT plug the power cord of the subwoofer into the switched outlet of a receiver or other piece of equipment. The
power cord should be plugged directly into an AC outlet.
11
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
HOME THEATER RECEIVER OR PROCESSOR
WITH PREAMP SUBWOOFER OUT (XLR)
PREAMP OUTPUTS
SUBWOOFER
2
2
2
2
2
2
2
2
2
2
2
To XLR signal input of
additional subwoofers
(Duo & Quattro systems)
Signal output from
subwoofer amp XLR
direct pass-thru
2
FUSE
5x20mm
250VAC
8A
FAST-BLO
Set crossover “LOW-PASS FILTER” switch to “BYPASS (OFF)”
when used in home theater system with a surround sound
receiver/processor utilizing a built in crossover.
Set “AUTO ON/OFF” switch to “ALWAYS ON”
when using XLR input.
C
AC power cord
Figure 5. Home Theater Installation Using Balanced XLR Input
12
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
INSTALLATION
Duo/Quattro Hardware & Connections
When using 2 or 4 subwoofers in a Duo or Quattro configuration, mounting brackets are required to properly
secure the subwoofers together. Three different stacking bracket kits are available to suit different mounting
configurations:
STACKING BRACKET KITS
NOTE: each kit sold separately.
NOTE: screws are 1/4” -20 x 5/8”
Kit 1:
(P/N: SBK-5MM)
Kit 2:
(P/N: SBK-2S)
Kit 3:
(P/N: SBK-1L)
• 4 thick (5mm) rubber pads (50x50mm, with adhesive)
• 4 thin (3mm) rubber pads (50x50mm)
• 2 small brackets with 8 screws
• 1 large bracket with 4 screws (used only on DXD-12012)
Refer to the instructions included with the stacking bracket kit for instructions how to properly install them.
Consult your place of purchase or www.kreiselsound.com for more information regarding product accessories
that may be required for proper system setup.
All connections for the subwoofer are located on the rear of the unit. Figure 5 & 6 illustrate the connections for a
typical multiple subwoofer system (Duo/Quattro) using XLR cables & the subwoofer's built in XLR "DIRECT PASSTHRU" feature. You may use this method of connection if your receiver/processor offers an XLR subwoofer output
jack. If your receiver/processor only offers an RCA subwoofer output jack, you will require an adapter cable that
converts the RCA output to an XLR style connector in order to use the XLR "DIRECT PASS-THRU" feature.
Home Theater System (with receiver/processor with internal crossover & XLR's):
● Set auto on/off switch to "ALWAYS ON"
● Set crossover bypass switch to "BYPASS (OFF)" (indicated by green dot)
● The "VARIABLE LOW-PASS FILTER" frequency control knob has no effect when above switch
is set to "BYPASS (OFF)"
● Adjust the "BASS LEVEL" control knob to the "REFERENCE LEVEL" setting (indicated
by green dot)
● Set the "VARIABLE PHASE" control knob to "0" (indicated by green dot)
If you do not wish to use the XLR "DIRECT PASS-THRU" feature, you may connect your Duo/Quattro system
subwoofer using regular high quality RCA cables if your receiver offers multiple RCA subwoofer output jacks. If
your receiver has only 1 available subwoofer output jack, you will need to purchase RCA Y-cables (a.k.a. signal
splitters) in order to connect your woofers as shown in Figure 7.
Home Theater System (utilizing receiver/processor with internal crossover & RCA's):
● Set crossover bypass switch to "BYPASS (OFF)" (indicated by green dot)
● The "VARIABLE LOW-PASS FILTER" frequency control knob has no effect when above switch is set to
"BYPASS (OFF)"
● Adjust the "BASS LEVEL" control knob to the "REFERENCE LEVEL" setting (indicated by green dot)
● Set the "VARIABLE PHASE" control knob to "0" (indicated by green dot)
CAUTION!
To reduce risk of shock or damage, connect AC power cord after all other connections have been completed. Do
NOT plug the power cord of the subwoofer into the switched outlet of a receiver or other piece of equipment. The
power cord should be plugged directly into an AC outlet.
13
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
SETUP NOTES:
When used in Duo/Quattro systems, the controls on each subwoofer MUST
be set identical to one another for proper performance.
When used in Duo/Quattro systems, the input impedance of each subwoofer
is connected in parallel, lowering the total input impedance as follows:
-Single subwoofer XLR input = 15k
-Duo system combined XLR inputs = 7.5k
-Quattro system combined XLR inputs = 3.75k
Some equipment with high output impedance may not be able to properly
drive multiple subwoofers & may require a line driver/buffer.
U E
20
C
8A
F S B O
From 3rd Subwoofer’s
XLR “DIRECT PASS-THRU” to
4th Subwoofer’s
“XLR BALANCED INPUT”
(Quattro only)
U E
20
2 0 AC
8A
A T LO
OPTION A.
HOME THEATER RECEIVER OR PROCESSOR
WITH PREAMP SUBWOOFER OUT (XLR)
From 2nd Subwoofer’s
XLR “DIRECT PASS-THRU” to
3rd Subwoofer’s
“XLR BALANCED INPUT”
(Quattro only)
PREAMP OUTPUTS
SUBWOO ER
Receiver/Processor
subwoofer XLR output
F SE
0
C
A
S B O
2
OPTION B.
HOME THEATER RECEIVER OR PROCESSOR
WITH PREAMP SUBWOOFER OUT (RCA)
PREAMP OUTPUTS
SUBWOOFER
To XLR balanced input of
1st subwoofer in system
From 1st Subwoofer’s
XLR “DIRECT PASS-THRU” to
2nd Subwoofer’s
“XLR BALANCED INPUT”
(Duo & Quattro)
Receiver/Processor
subwoofer RCA output
RCA to XLR adapter cable
to XLR balanced input of
1st subwoofer in system
20
2 0 AC
8A
A T LO
REAR VIEW (Quattro)
Figure 6. Duo/Quattro Installation Using Balanced XLR Input
14
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
SETUP NOTES:
When used in Duo/Quattro systems, the controls on each subwoofer MUST
be set identical to one another for proper performance.
When used in Duo/Quattro systems, the input impedance of each subwoofer
is connected in parallel, lowering the total input impedance as follows:
-Single subwoofer RCA input = 8k
-Duo system combined RCA inputs = 4k
-Quattro system combined RCA inputs = 2k
Some equipment with high output impedance may not be able to properly
drive multiple subwoofers & may require a line driver/buffer.
U E
20
C
8A
F S B O
Route 1 RCA cable to unbalanced input
of each subwoofer in system
marked with green dot
HOME THEATER RECEIVER OR PROCESSOR
WITH PREAMP SUBWOOFER OUT (RCA)
U E
20
2 0 AC
8A
A T LO
PREAMP OUTPUTS
SUBWOOFER
Receiver/Processor
subwoofer RCA output
3x RCA “Y-cables” (signal splitters)
F SE
0
C
A
S B O
2
Route 1 RCA cable to unbalanced input
of each subwoofer in system
marked with green dot
20
2 0 AC
8A
A T LO
REAR VIEW (Quattro)
Figure 7. Duo/Quattro Installation Using Unbalanced RCA Input
15
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
CALIBRATION
For optimal performance, you should calibrate your system to ensure proper level matching between all speakers
and the proper setting of all controls (including crossover frequency, phase, and any channel delays your receiver/
processor may offer). This procedure will vary depending on system configuration and the information below is
provided as a basic guide to assist you. Refer to the owner's manual for your receiver/processor for information
on performing the steps required to enter their setup mode and adjust any applicable settings.
After all connections have been made, turn on the AC power to your system, starting with the first piece of
source equipment in the signal chain (such as a CD or DVD player), then power on any dedicated equalizer, then
power on your receiver/processor/amplifier(s), and last but not least, power on the subwoofer. A few seconds
after powering on the subwoofer, the LED should turn green indicating the unit is "ON". If there is music playing
from your source, you should hear sound if the subwoofer is receiving a signal and the volume control set above
minimum (or to "REFERENCE LEVEL"). Verify that sound is coming from the subwoofer before proceeding with
system calibration (it may be necessary to walk up to the subwoofer and listen or feel the unit to detect if it's
operational when playing at low volume). If the subwoofer is not operating, and the LED is green, recheck all
your signal cable connections to the subwoofer first, then verify if the subwoofer's control settings match the
settings shown in the illustrations for your connection method. If the signal connections and subwoofer controls
are correct, and AC power is applied to the subwoofer and it is powered on (indicated by a green LED), you may
need to verify if your receiver/processor is properly set to output signal from the jack you used to connect the
subwoofer. You may need to enter your receiver's/processor's setup mode and adjust any applicable speaker
settings to properly match your system configuration before your receiver/processor outputs a signal from the
subwoofer output jack.
Receiver/Processor With Automated Setup & Calibration Function
After you have verified the subwoofer is operational, you should perform the auto-setup routine on your receiver/
processor (if available). Many newer home theater receivers/processors combine a measurement microphone
and an automated setup routine to assist you with proper setting of speaker levels, crossover frequency, speaker
delay and phase. Consult the owner's manual for your receiver/processor for further instructions on how to
perform the setup routine. After the auto-setup routine is complete, verify the final settings the receiver/processor
selected to ensure there are no erroneous settings (e.g. the settings should match your system configuration).
Some settings to verify include:
● Number of speakers (e.g. 7.1 or 5.1 system, etc.)
● Type/size of speakers (e.g. small or large front/surround and set subwoofer to yes/on)
● Crossover point should be similar for identical speakers (e.g. if your system using 3 of the same
speakers for all front channels, verify the receiver/processor selected the same crossover point for
all these channels)
● Crossover frequency should correspond with speaker size & low frequency response (e.g. large
speakers may be able to use a lower crossover frequency such as 80Hz and smaller speakers may
require a higher frequency such as 100-150Hz)
● Gain settings for each channel should be reasonably close (e.g. if the speakers are placed at even
distances, the gain setting for each channel should typically be within a couple dB from channel to
channel). If the receiver/processor gain trim setting for the subwoofer channel is a large value (e.g.
+12 or -12dB) verify that you have the subwoofer 'BASS LEVEL" control set to "REFERENCE LEVEL".
● Low subwoofer
cessor)effectthe
ofthe"AUTOON/
OFF" signal sensing circuit. If your receiver/processor gain is set to a low values (e.g. attenuating
the signal -6dB or more) this reduces the signal available to properly "turn on" the subwoofer
when using the "AUTO ON/OFF" feature. If your subwoofer turns off unexpectedly when watching
movies at low volumes, you may wish to increase the receiver's/processor's subwoofer gain trim, and
manually reduce the volume using the subwoofer's "BASS LEVEL" control to maintain proper balance.
● Polarity/phase
● Eq settings; if your receiver/processor allows you to see the eq settings for each channel, verify that
it is not adding any extra "limiter", or "HPF" to the subwoofer channel, and that it is not adding a high
level of boost (e.g. >+3dB) or cut (e.g. -10db)
16
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
NOTE:
In some installations, automated room eq algorithms may make undesired changes to the subwoofer signal
settings trying to obtain what they believe is the best room response curve. In some systems these changes have
been known to degrade the overall sound quality of the subwoofer. If using a receiver/processor with automated
room eq function, we advise you listen to the system first with the eq disabled, then again with the eq enabled,
to determine if the changes are beneficial.
Receiver/Pre-amp Without Automated Setup
Older receivers and/or music preamps may not provide an automated setup function. With these sytems, optimal
calibration usually requires some type of test equipment be utilized to provide test tones and take measurements
to properly calibrate your system. Some equipment you may use for this includes:
● Test signal source; pink noise and/or sine wave of various frequencies (CD, DVD, your receiver/preamp, or
external measurment equipment)
● SPL meter (low cost handheld versions can be purchased online)
● RTA or other frequency response
ement
tional)
● Start with a quiet room free of excess background noise (e.g. people talking, kids playing, dogs barking,
etc.).
● Verify that subwoofer control settings match illustrations for your type of system configuration
● Set any receiver/pre-amp speaker settings at an appropriate starting point (e.g. crossover)
● Start playing a test signal with energy in the subwoofer crossover region (e.g. pink noise) through all speakers
● While observing an SPL meter (or listening to the mid-bass level), have an assistant adjust the "VARIABLE
PHASE" knob from 0° to 180° and observe any change in mid-bass level. Set the control to the position with
the greatest amount of bass.
● Play a test signal (e.g. pink noise) through only 1 speaker at a time. If using your receiver, you may need to
enter it's setup mode to perform this function.
● Place an SPL meter in your typical listening position, approximately at ear height (use of a tripod may
be required), and set to "C" weighting and "Slow" response (if those settings are available)
● Adjust volume to a modest level ~ 75dB (loud enough to clearly hear, but not excessively loud)
● Adjust controls as necessary to play the same test tone through each speaker in the system, 1 speaker at a
time
● Adjust the individual channel gain/trim of your equipment to obtain the same SPL reading from each
speaker as you measured from the first speaker
A home theater receiver may walk you though portions of this procedure. Follow any instructions from your
receiver's owner's manual as applicable to your system setup. Once finished, listen to some familiar music and
movie tracks. Minor adjustment of the "BASS LEVEL" may be desired. Do not be afraid to experiment with slight
adjustments to find what may improve the sound in your system!
At this point, if the subwoofer is placed in a good location & the controls have been properly set to blend the
subwoofer's output with your main speakers, you should have a system that offers greatly improved low frequency
response & dynamics, and the ability to play your system at higher volume levels with less distortion. Music should
sound evenly balanced, deeper and very smooth. Movies will now have a much more realistic sense of involvement,
especially in scenes with special effects such as car chases, airplanes, spaceships, explosions and more. Best of
all, these KEN KREISEL DXD subwoofers equally combine the ability to reproduce the subtle nuances
of a great music recording and the dynamics required for playing movies at theater levels inside your house.
17
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
PROTECTION CIRCUITRY
Your new subwoofer is equipped with special protection circuitry to provide maximum performance with greatest
reliability.
The unit is protected against:
1) Overdriving the speaker or amplifier.
2) Overheating the amplifier.
3) Excessive drop in power line voltage.
The first type of protection circuitry which prevents overdriving of the speaker or amplifier operates constantly
without being audible under most situations. In some extreme situations (e.g. sustained high output levels in warm
environments), the unit may shut down momentarily. This indicates operation of the thermal or undervoltage
protection circuitry. If this should happen, you should reduce the volume setting or shut the unit off until
normal operating conditions return. You may also want to plug the unit into a different wall outlet (or circuit), as
inadequate power line voltage & current will be most noticeable under high output conditions.
CARE OF YOUR SUBWOOFER
Your new subwoofer does not require any regular maintenance. Normal dusting or cleaning of the surface for
appearance purposes is all that is required. Avoid using harsh detergents or chemicals when cleaning the cabinet.
Abrasives, detergents, or cleaning solutions may damage the finish on the cabinet. We recommend using only
a damp cloth or automotive grade "quick detailer" designed for painted surfaces, plastic & metal trim, to clean
the cabinet.
During normal conditions, your new subwoofer may be left on continuously without any problems. The unit is
equipped with a signal-sensing automatic turn on/off function that will automatically turn the unit on when a
signal is present at the RCA inputs and turn off the unit after several minutes without signal present at the RCA
inputs (if the panel mounted switch is set to "AUTO ON/OFF").
NOTE: the auto on/off signal sensing does not operate when using the XLR inputs - set the switch to "ALWAYS
ON" when using XLR inputs. If you plan to leave the subwoofer unused for an extended period of time (e.g. when
away on vacation), we recommend that you turn off the master power switch located on the lower rear panel.
18
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
TROUBLESHOOTING AND SERVICE
If you should experience a problem with the operation of your subwoofer, please check all of the following before
seeking service. Following is a simple troubleshooting guide to assist you.
1.
2.
3.
4.
5.
7.
8.
Verify unit is plugged in and power outlet used has proper AC voltage & current.
Is power switch on?
Is auto turn on/off properly set?
Is the subwoofer receiving an input signal from your source?
Have all controls on the subwoofer (volume, crossover, phase, etc.) been properly set?
Is the volume control properly set to match source signal?
If the subwoofer has been running at high levels for an extended period of time, one of the protection
circuits may be engaged.
• Does the built-in amplifier panel feel extremely hot?
for full output?
• Is your AC power line circuit sufficiently rated to supply adequate VA
If the protection circuitry is active, the unit may cycle on and off until operating parameters return to normal.
Under more serious conditions, the unit may shut off completely. Normal operation will return upon cooling,
but depending on the fault condition you may be required to turn the main power off for several minutes and
then back on again to reset the unit.
The following conditions require service by a qualified technician:
1.
2.
3.
4.
The unit has been exposed to liquid.
The power cord has become damaged.
The unit does not appear to operate normally or exhibits a marked change in performance.
Part of the cabinet, drivers, or electronics have been physically damaged.
Thank you for your purchase!
For additional help visit our support page on the web at: www.kreiselsound.com/support.php
19
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
SPECIFICATIONS
DRIVER CONFIGURATION:
DXD-808 DXD-12012
KEN KREISEL PROFESSIONAL Push-PullHigh Velocity DeepBass Drivers
DRIVER SIZE:
8"
12"
MAGNET WEIGHT:
82 oz. (5.125 lbs.)
96 oz. (6.0 lbs.)
VOICE COIL:
2" Four Layer
2" Four Layer
IN-ROOM FREQUENCYRESPONSE: 15Hz -
Hz
10Hz -
Hz
LOW PASS CROSSOVER:
40Hz - 160Hz
12dB/octave
40Hz - 160Hz
12dB/octave
PHASE:
0°-180° variable0°-180° variable
AMP POWER (Class D):
1250+ W
750+ W
INPUTS:
INPUT IMPEDANCE:
1x Balanced XLR
2x Unbalanced RCA 1x Balanced XLR
2x Unbalanced RCA
XLR: 15k ohms
RCA: 8k ohms
XLR: 15k ohms
RCA: 8k ohms
OUTPUTS:
1x XLR direct pass thru
(unbuffered)
XLR
pass thru
(unbuffered)
WARRANTY (parts & labor):
Five years
Five years
DIMENSIONS (H,W,D)
(includes feet)
17 5/8" x 10 7/8" x 13"
23 3/4" x 15 3/8" x 19 3/8"
WEIGHT (approx.):
47 lbs. (21.3 kg)
78 lbs. (35.4 kg)
k
ontinuous
1250+ W
750+ W
Specifications subject to change without notice.
20
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
ontinuous
For additional help visit our support page on the web at: www.kreiselsound.com/support.php
DXD808/DXD12012 Operation Manual
Rev 1.07
01/2014
Copyright © 2013 Ken Kreisel ● www.kreiselsound.com
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