Directed Electronics 350 Stereo Amplifier User Manual

OWNER’S MANUAL
Model 350
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CONGRATULATIONS
Thank you for choosing a Directed Audio
power amplifier. Directed has been the
leader in high-quality and innovative
security products in the U.S. since
1990. Now we introduce to the car
audio industry the same winning
formula - products that meet the stringent standards of today’s mobile electronics enthusiast yet priced for
anyone’s budget. Featuring high-efficiency MOSFET power supplies, flexible
on-board crossovers, and state-of-the-art
audio design, Directed Audio amplifiers
will satisfy every music lover’s needs for
years to come. Your Directed Audio
power amplifier comes with a two year
limited warranty if it is installed by an
authorized DEI dealer. Amplifiers not
installed by an authorized Directed
dealer are covered by a one year partsand-labor limited warranty. Please save
your sales receipt and refer to the
warranty section of this manual for
complete details.
© 2000 Directed Electronics, Inc.
TABLE OF CONTENTS
Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 2
Amplifier Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
Amplifier Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5
Speaker Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . .Page 6
Crossover Setting and Gain Adjustment . . . . . . . . . . . . . . . .Page 7
Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 9
WARNING
High-powered car audio
systems may produce
sound pressure levels that exceed the
threshold at which hearing loss may
result.
© 2000 Directed Electronics, Inc.
They may also impair a driver’s ability to
hear traffic sounds or emergency vehicles. Use common sense and practice
safe listening habits when listening to or
adjusting your audio system.
1
INSTALLATION GUIDELINES
1. Please read the owner’s manual
carefully before you install the
amplifier.
2. Disconnect the battery ground
terminal prior to making any electrical connections.
3. Check for any hazards or obstructions such as gas tanks, fuel or
brake lines, and wiring harnesses
before mounting the amplifiers.
4. Pick a mounting location that will
provide adequate access and ventilation and protect the amplifier
from heat, moisture, and dirt.
5. Avoid sharp metal areas when
routing cables to the amplifier, and
run RCA cables away from the
power cables and other potentially
noisy car harnesses.
6. The amplifier should be grounded
with a short, heavy gauge wire
connected directly to the car at a
bare metal surface. Make sure
that the metal area is part of the
car chassis or frame, not a separate
part with poor electrical connection
to the chassis.
7. Always fuse your power connection
at the battery within 8-10 inches of
the battery terminal. Use a fuse or
circuit breaker rated at about 5-10
2
more amps than the on board
fuse(s) of the amplifier(s). The
gauge of power wire used should
take into account the total current
draw of the system, and the length
of wire used. IASCA and other
autosound competition organizations have charts available for this;
you can also find a chart in the
MECP study guide. Minimum wire
gauge recommendations for the
individual amplifiers are listed on
the specification page. It is a good
© 2000 Directed Electronics, Inc.
INSTALLATION GUIDELINES (continued)
is generated. For low impedance
speaker applications or restricted
ventilation installations, an external
cooling fan may be advisable.
9. Your connections to the amplifier’s
speaker and power terminals
should be made with crimped spade
lugs, and the battery and ground
connections to the vehicle should be
made with crimped ring terminals
of the appropriate size (surface
area is what counts); soldering the
terminals after crimping is also
recommended.
© 2000 Directed Electronics, Inc.
10. Due to the high-frequency MOSFET
switching power supply used in all
Directed Audio amplifiers, filtering
the power cable is not generally
required (remember that the amp
can’t deliver full output if the power
supply is restricted). Proper
grounding of the signal source is
mandatory for the amplifier to
reach its performance peak. If the
RCA inputs are not grounded
adequately via the signal source,
electrical noise from the vehicle
may be picked up in the system.
3
AMPLIFIER CONNECTIONS
Refer to Figure 1 for details.
1. GROUND TERMINAL - connect this
terminal to the car chassis with a
short heavy gauge wire, DO NOT
CONNECT TO THE NEGATIVE
TERMINAL OF THE CAR BATTERY or
to factory chassis ground points
already occupied by factory wires!
If you are grounding multiple amplifiers, you may use a high-current
distribution block with proper gauge
cables, or use individual grounds for
each amp attached to the vehicle at
separate but close ground points.
2. REMOTE TERMINAL - connect this
terminal to the amplifier remote
output from your head unit or signal
source or power antenna output
wire from decks that do not have
separate amp remote outputs. Do
not connect this terminal to a
constant source of +12V.
3. +12V POWER TERMINAL - connect
this terminal to the positive
terminal of the car or separate
audio system battery. Refer to the
installation guidelines and specs
page for proper gauge of wire. YOU
MUST PROTECT THIS WIRE WITH A
FUSE or circuit breaker located
close to the battery.
4. POWER FUSES - protects the amplifier against electrical damage. DO
NOT REPLACE THE FUSES WITH
LARGER AMPERAGE FUSES ! If the
fuses blow, check your system for
wiring problems or see your dealer.
5. SPEAKER OUTPUT TERMINALS Refer to the speaker wiring
diagrams (pg.6) for different
wiring options.
6. SUBWOOFER OUTPUT - connect
the subwoofer to these terminals.
FIGURE 1—AMPLIFIER CONNECTIONS
4
© 2000 Directed Electronics, Inc.
AMPLIFIER CONTROLS
Refer to Figure 2 for details.
1. RCA INPUT JACKS - accepts linelevel outputs from head units or
signal sources at voltages from
200mV to 8 volts.
2. GAIN ADJUSTMENT - controls the
gain (input sensitivity) of the
amplifier. Each control sets the gain
for that half of the amplifier.
3. CROSSOVER SELECTION SWITCH controls the type of filter for each
of two on-board active crossovers.
Set crossover switches for proper
filter type depending on system
configuration.
4. REMOTE SUB LEVEL - controls the
subwoofer output level
5. SUBWOOFER LOW-PASS
CROSSOVER - use the gain and
crossover frequency controls to
adjust the subwoofer output.
6. BASS EQ - This switch activates an
8dB bass boost circuit. Use as
necessary for low frequency
enhancement.
7. CROSSOVER FREQUENCY - controls
the frequency range of the amplifier. Each half of the amplifier can
be set independently for optimum
performance.
8. LED INDICATOR - the green Power
LED lights to indicate normal operation. The green LED will shut off to
indicate amp shutdown due to
thermal, short circuit, DC offset, or
over-current conditions detected by
on-board protection circuits.
FIGURE 2—AMPLIFIER CONTROLS
© 2000 Directed Electronics, Inc.
5
SPEAKER WIRING DIAGRAMS
Five channel operation
Three channel operation
For bridged three channel operation as shown in this diagram, connect right channel
RCAcables to the “FRONT” inputs of the amplifier, and left channel RCA cables to the
“REAR” inputs of the amplifier.
6
© 2000 Directed Electronics, Inc.
CROSSOVER SETTINGS AND GAIN ADJUSTMENT
Your Directed Audio power amplifier needs to be adjusted carefully to achieve
maximum performance. These are some guidelines to follow when fine-tuning
the amplifier.
• For normal complete system applications, the crossover selection switches should be
set to "HPF".
• The crossover frequency controls need to be adjusted to suit your particular system.
For subwoofer applications, try and keep the setting low enough to prevent image
smearing (you should not be able to hear male voices from the subwoofer) but not so
low as to create a gap between the subwoofer and the mid-bass/midrange speakers.
For mid-bass/midrange settings, try to keep the frequency low enough to keep your
sound stage in front of you, without overdriving the speaker. It will be to your advantage to spend some extra time with these adjustments, listening to familiar music or
system set-up discs to achieve the kind of musical reproduction that you prefer.
• The gain adjustments allow you to set proper signal match for clean, quiet amplifier
operation. For full-range and simultaneous stereo/mono bass applications, start by
playing some music you are familiar with. With the gain adjustments on the amplifier
in the middle of their rotation, bring up the volume on your head unit to the 3/4
volume setting or until you start to hear distortion or clipping. If you hear distortion
before you reach the 3/4 volume setting of your head unit, reduce the gain settings
on the amplifier and start to raise the head unit volume again. When you can listen
to the music at or slightly above 3/4 on your head unit without audible distortion,
slowly raise the gain of the amplifier until distortion is heard, then back off the gain
until the distortion is not audible. This setting will allow you to reach full output with
all but the quietest of source material, while avoiding excessive noise in the system.
You may need to set the rear channels gain control lower to maintain a good sound
stage.
• The same procedure should be used for adjusting the amplifier when the on board
crossover is set to LPF or FLAT, but you will also have to take into consideration the
effect that gain adjustment has on system frequency response and imaging. Again,
plan on spending some time with music that you know getting the gain and crossover
settings the way you like. Test discs and analyzers may help with this process, but in
the end it's your ears that count - listen to the music !
© 2000 Directed Electronics, Inc.
7
SPECIFICATIONS
ch 1-4
ch 5
RMS continuous power per channel,Channels 1-4 driven into 4 ohms
from 20 to 20,000 Hz, with less than 0.08% total Harmonic Distortion
@ 14.4 VDC. Channel 5 driven into 4 ohms from 20-250 Hz, with less
than 0.08% THD @ 14.4 VDC.
35
watts
100
watts
RMS continuous power per channel,Channels 1-4 driven into 2 ohms
from 20 to 20,000 Hz, with less than 0.1% Total Harmonic Distortion
@ 14.4 VDC. Channel 5 driven into 2 ohms from 20-250 Hz, with less
than 0.1% THD @ 14.4 VDC.
50
watts
150
watts
RMS continuous power, 3-channel operation, channels 1-4 bridged into
4 ohms from 20 to 20,000 Hz, with less than 0.1% Total Harmonic
Distortion @ 14.4 VDC. Channel 5 driven into 2 ohms from 20-250
Hz, with less than 0.1% THD @ 14.4 VDC.
100x2 150
watts watts
Dynamic power rating (IHF-202 Standard) at
minimum load
450 watts
Signal-to-Noise Ratio
Greater than 95 dB
Frequency Response
20-20,000 Hz ± 0.5 dB
Damping Factor @ 4 ohm
Greater than 200
Crossover
Switchable high or low pass
12 dB/octave, continuously
variable 50 to 500 Hz
Subwoofer Crossover
Bass Equalization
Low pass 12 dB/octave,
variable 50 to 250Hz
+8 dB, centered at 40Hz
Input Impedance
20K ohms
Input Sensitivity
Variable from 150 mV to 8 volt
Output Impedance (ch 1-4)
2 to 8 ohms, stereo
4 to 8 ohms, bridged
2 to 4 ohms
10 to 16 VDC
50A
#10
(ch 5)
Supply Voltage
Fusing and Power
Cable Requirements (AWG)
(Per amp, trunk mounted)
8
© 2000 Directed Electronics, Inc.
LIMITED TWO YEAR CONSUMER WARRANTY
Directed Electronics, Inc. (DEI ) promises to
the original purchaser, to replace this
product should it prove to be defective in
workmanship or material under normal use,
for a period of two years from the date of
purchase by the dealer as indicated by the
date code marking of the product
PROVIDED the product was installed by an
authorized DEI dealer. During this two year
period, there will be no charge for this
replacement PROVIDED the unit is returned
to DEI, shipping pre-paid. If the unit is
installed by anyone other than an authorized DEI dealer, the warranty period will be
1 year from date of purchase by the dealer
as indicated by the date code marking of
the product. During this 1 year period, there
will be no charge for this replacement
PROVIDED the unit is returned to DEI, shipping pre-paid. This warranty is non-transferable and does not apply to any unit that has
been modified or used in a manner contrary
to its intended purpose, and does not cover
damage to the unit caused by installation or
removal of the unit. This warranty is void if
the product has been damaged by accident
or unreasonable use, neglect, improper
service or other causes not arising out of
defects in materials or construction. ALL
WARRANTIES INCLUDING BUT NOT
LIMITED TO EXPRESS WARRANTY,
IMPLIED WARRANTY, WARRANTY OF
MERCHANTABILITY, FITNESS FOR PARTIC®
© 2000 Directed Electronics, Inc.
ULAR PURPOSE, AND WARRANTY OF
NON-INFRINGEMENT OF INTELLECTUAL
PROPERTY ARE EXPRESSLY EXCLUDED TO
THE MAXIMUM EXTENT ALLOWED BY
LAW, AND DEI NEITHER ASSUMES NOR
AUTHORIZES ANY PERSON TO ASSUME
FOR IT ANY LIABILITY IN CONNECTION
WITH THE SALE OF THE PRODUCT. DEI
HAS ABSOLUTELY NO LIABILITY FOR ANY
AND ALL ACTS OF THIRD PARTIES
INCLUDING ITS AUTHORIZED DEALERS
OR INSTALLERS. Unit must be returned to
DEI, postage pre-paid, with: consumer’s
name, telephone number, and address,
authorized dealer’s name and address, and
product description. IN ORDER FOR THIS
WARRANTY TO BE VALID, YOUR UNIT
MUST BE SHIPPED WITH PROOF OF
INSTALLATION BY AN AUTHORIZED DEI
DEALER. ALL UNITS RECEIVED BY DEI FOR
WARRANTY REPAIR WITHOUT PROOF OF
DEI DEALER INSTALLATION WILL BE
COVERED BY THE LIMITED 1 YEAR PARTS
AND LABOR WARRANTY. Note: This
warranty does not cover labor costs for the
removal and reinstallation of the unit. BY
PURCHASING THIS PRODUCT, THE
CONSUMER AGREES AND CONSENTS THAT
ALL DISPUTES BETWEEN THE CONSUMER
AND DEI SHALL BE RESOLVED IN ACCORDANCE WITH CALIFORNIA LAWS IN SANDIEGO COUNTY, CALIFORNIA.
9
OTHER PRODUCTS AVAILABLE FROM:
®
•
•
•
•
CLASS D MONO AMPLIFIERS
2 CHANNEL AMPLIFIERS
4 AND 5 CHANNEL AMPLIFIERS
SIGNAL PROCESSORS
•
•
•
•
TUBE SUBWOOFERS
POWERED SUBWOOFERS
SINGLE AND DUAL VOICE COIL SUBWOOFERS
COAXIAL SPEAKERS
•
•
•
SINGLE AND DUAL VOICE COIL SUBWOOFERS
COAXIAL SPEAKERS
COMPONENT SPEAKER SYSTEMS
•
•
SINGLE AND DUAL VOICE COIL DIE-CAST SUBWOOFERS
COMPONENT NEODYMIUM SPEAKER SYSTEMS
•
SINGLE AND DUAL VOICE COIL DIE-CAST SUBWOOFERS
•
•
•
•
•
HIGH PERFORMANCE POWER CABLES
PREMIUM SPEAKER/AUDIO CABLES AND ADAPTERS
POWER CAPACITORS
GOLD-PLATED POWER DISTRIBUTION AND FUSING BLOCKS
GOLD-PLATED POWER AND SPEAKER TERMINALS
Always use a
© 2000 Directed Electronics, Inc. • Vista, CA 92083 • All Rights Reserved
DEI is a proud member of
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