Rockville dB55 Multichannel Amplifier User Manual

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Rockville dB55 Multichannel Amplifier User Manual | Manualzz
ROCKVILLE
power $
Sam,
%
$
Allan \
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©
CER - 200°
dB
Series
OWNER’S MANUAL for dB25, dB45,
and dB55 CLASS AB AMPLIFIERS
Introduction
Thank you for purchasing this Rockville dB Series amplifier. Over the years, the technology used to create audio amplifiers has grown by leaps
and bounds. Our competition is satisfied with just continuing to build the same units year after year without thought for improvement, but not
Rockville. We consider it our mission to use our expertise in developing the latest technologies and to bring you the absolute best sounding
amplifiers on the market and of course at a reasonable price. You will be amazed at the quality and power that these new amps offer.
We have spared no expense in designing these amplifiers, creating the most rugged, reliable, powerful and best performing amplifiers. In fact we
are so sure of the quality we backup every dB Series amplifier with one year warranty which exemplifies our commitment to the end user. (See
enclosed warranty card for details.)
Please read this installation guide carefully for proper use of your dB Series amplifier. Read this entire guide fully before attempting your installation.
IMPORTANT SAFETY INSTRUCTIONS
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: BE AWARE! Use of this amplifier at extreme high volumes for extended periods of time may cause hearing loss and or
hearing damage. During periods of prolonged high volume levels it is recommended that you use ear safety devices. Your ability to hear
necessary traffic sounds will be impaired. While driving always keep your sound volume at reasonable levels. We at Rockville want you
listening for many years to come.
* When installing the amplifier, secure it tightly. An unmounted amplifier in your car can cause serious injury to passengers and damage to your
vehicle if it is set in motion by an abrupt driving maneuver or short stop.
* To reduce risk of electric shock, never open the unit. There are no user serviceable parts, refer service to an authorized Rockville service center.
* Do not expose this unit to any kind of moisture.
* Please ensure that the unit is situated in a properly ventilated area.
Installation
Installation Basics
Before you begin your installation, disconnect the NEGATIVE(-) terminal from your car’s battery. This safety precaution will avoid possible short circuits while wiring your amplifier.
Rockville amplifiers operate on 12-volt negative ground systems only. It is recommended that you layout your sound system design on paper first. This will help you during the
installation so that you will have a wiring flow chart and not miss-wire any of your components.
Mount the amplifier in the trunk or hatch area of your vehicle. Never install an amplifier in the engine compartment or on the firewall. Please be sure to leave breathing room around the
amplifier heat sink so that it can dissipate the heat it produces efficiently. The amplifier can be installed either horizontally or vertically.
When mounting the amplifier on the trunk floor, be sure to watch for your gas tank, gas lines and electrical lines. Do not drill or mount any screws where they might penetrate the gas
tank of your car.
Mounting The Amplifier
The dB Series amplifiers feature four mounting tabs located at the amplifiers four corners. Choose a convenient mounting location with unobstructed airflow. Lay down the amplifier and
mark the location of the mounting holes. Remove the amplifier and drill pilot holes for the screws. Place the amplifier and secure it to the mounting surface using the supplied screws.
DO NOT OVER TIGHTEN THE SCREWS.
© ROCKVILLE
(owns а а |= ©) dE dB25 O m) un m EEE)
1. Make sure to disconnect the NEGATIVE (-) terminal from your car’s battery.
2. Attach an 8 guage or heavier wire to the amplifier screw terminal marked GND. Connect the other end to the car’s chassis. The connection should be as close to the amp as possible;
preferably 40” or less. When connecting the ground wire make sure that there is no paint or other insulator blocking a good ground connection. When installing multiple amplifiers, mount
them in close proximity so that they can all share the same ground point.
3. Connect the remote terminal to the head unit’s remote output using 16 gauge or heavier wire. This connection is responsible for turning the amplifier on and off with the rest of the
system. If there is no dedicated remote output, make this connection to the power antenna lead. Should your head unit not have any turn on leads, you can wire the remote terminal to an
accessory lead, which turns the amplifier on with your car’s ignition.
4. Use 8 gauge or heavier wire to connect the screw terminal marked +12V to the car battery’s POSITIVE (+) terminal. In order to protect the battery and electrical systems of your
vehicle, add an in-line fuse holder within 18” of the car battery. This in-line fuse offers protection against damage from short circuits. The power wire should terminate in a large ring
terminal connected directly to the POSITIVE (+) terminal. An optional second fuse can be installed closer to the amplifier for additional protection to the amplifier itself. If installing multiple
amplifiers, install a distribution block near their location and, using a 4 gauge wire, connect the block to the in-line holder that is connected to the battery.
5. Insert fuse(s) into the in-line fuse holder(s) and check that all connections are properly secured.
6. Before powering up the system, set all of the ampilifier’s level controls to minimum, the crossover/setting switches to the desired postion, and the head unit’s volume to 3/4.
We have received amplifiers back to our service department with melted power/ground terminals caused by a bad ground connection. When there is a lack of good ground, heat builds up
at the contact screws of the amplifier terminal. Over time the heat generated will begin to melt the terminal. It is a good practice to feel the power and ground wires near the amplifier after
using the amp for a while. If the wires feel hot to the touch you probably have a bad or loose connection. If after adjusting your connections the wires still feel hot, you should upgrade to
next heaviest gauge wire. As connections can work loose due to vehicle vibrations we recommend periodically tightening all power and ground connections.
The majority of the dB Series amplifers are supplied with built-in fuses. Never replace the built in or supplied external fuse with one of a larger value.
| |
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© dB 4 OHMMONO BRIDGED Dre © ссе ав25 ©
| |
HEAD UNIT
BATTERY or
VEHICLE'S ACCESORY LEAD 5
Settings
Adjusting The System
1. Once the system is operational, set all crossover points to approximate settings. In the case of the basic sub woofer system Low Pass filter crossover at 100Hz or so. Set the bass
equalizer controls to 0 dB. Turn the controls using a small flat head screwdriver. Do not apply any pressure while turning as this might break the control unit.
2. Now set the ampilifier’s Input Sensitivity adjustment. The control(s) accessible on the side of the amplifier marked LEVEL or INPUT LEVEL adjusts the input sensitivity. Turn it counter
clock wise to the MIN position. Adjust your head unit’s volume level to maximum. Now, turn the level control on the amplifier clockwise (towards the MAX position) until audible distortion
occurs. When you begin to hear distortion in the sound, back down one notch and your amp is set. It is helpful to have a second person to help you set the gain. When setting up a multi-
amp system, set each amplifier’s level controls separately. Start off with the bass amplifier, then adjust the highs amplifier’s level control to match. Please note that the level control of any
car amplifier should not be mistaken for a volume control. It is a sophisticated device designed to match the output level of your source unit to the input level of the amplifier. Do not adjust
the amplifier level to maximum unless your input level requires it. Your system can also be extremely sensitive to noise when the LEVEL is set to maximum and does not match your input
signal. These adjustments need to be made only once when first setting up the system.
3. Once you are satisfied with the level control settings, use any equalizer controls to adjust the system tonal level for personal preference. Keep in mind that after equalizing, you may
have to go back and reset the amplifier's level controls.
If your unit has been professionally installed please do not change the gain settings set by the installer, he is the professional!
Using The Electronic Crossovers
All dB series Class AB amplifiers feature fully adjustable 12dB per octave low-pass and high-pass electronic crossovers. The dB45 and dB55 feature separate crossovers for channels
1-2 and 3-4.
For Low Pass systems, set the CROSSOVER MODE switches to LOW PASS. Now the control marked LPF will control the low pass frequencies from 50Hz — 250Hz (dB55, dB25) and
50Hz — 3KHz (dB45). A frequent mistake made is setting the low pass frequency too low, especially when using vented sub woofer enclosures. We recommend that for most installations
you do not set the frequency knob lower than 80Hz.
When using the amplifiers for coaxial or component speakers, you will want to set the CROSSOVER MODE switch to FULL (preferred) or HIGH PASS. The HPF control knob adjusts the
high pass frequencies between 15Hz — 4KHz (dB55), 15Hz — 1KHz (dB45), and 60Hz — 1.2KHz (dB25).
Audio Preamp Input
The dB Series amplifiers feature RCA pre amp inputs. Run RCA cables from your sound source to the amplifier inputs. We suggest you use high quality, shielded RCA patch cords to help
reduce and eliminate unwanted electrical noise to your system. Use good quality RCA interconnect cables. Cheaper cables usually have poor shielding that can cause interference pickup.
Be sure to run the RCA cables on the side of the vehicle opposite to the side used to carry the power and ground leads of the amplifier.
Subsonic Filtering
dB55: For sub woofer installations with a passive LP crossover, you can set the amplifier’s CROSSOVER MODE selector to HIGH PASS while setting the HPF knob from the lowest setting
to 50Hz, this will act as SUBSONIC FILTER for all signals below that setting. This is especially useful for vented enclosures where the port tuning frequency falls below the sub woofer
tuning frequency to protect against sub woofer unloading.
6
5 Channel Amp Configurations
5 Channel Amp with 2 Channel Input
If your head unit has one single pair of RCA outputs, input them in to the amplifiers Channel 1 and 2 input jacks and set the Input Mode Switch to 2Ch. The amplifiers preamp circuitry will automatically
mix all the channels and output will occur on all 5 channels. There will be Left and Right balance with constant subwoofer but no Front to Rear Fader Control.
SOURCE
=— R
SSL
INPUT INPUT
REMOTE
H1 CH3 1 HPF MT o LPF SUBSONIC == CHS O)
ESO FULL РВОТЕСТ | * —* * —e |
MIN MAX 16H: акне 50Hz 250Hz 15Hz 50Hz О
Bo О © D o X-OVER D LEVEL BASS EQ INPUT MODE >
Oi | 1 @ . e . L | | ( )
MIN MAX 15Hz aKHz HPF FULL LPF 40Hz aKHz[MIN MAX 0dB 12dB SCH 4CH 2CH
ROCI E aæss О
INPUT MODE SWITCH
IN 2CH POSITION
5 Channel Amp with 4 Channel Input
If your head unit has two pairs of RCA outputs, input Front Left and Front Right in to amplifier channels 1 and 2 input jacks. Rear Left and Rear Right in to amplifiers channels 3 and 4 input jacks. Set
the Input Mode Switch to 4Ch. The amplifiers preamp circuitry will automatically mix all the channels and output will occur on all 5 channels. There will be Left and Right balance and Front to Rear
fader with constant subwoofer.
SOURCE
INPUT
О ©
50Hz 5
_ BASS EQ Ci) MODE o
. . e .
MIN MAX 16Hz 4KHz HPF FULL LPE 40Hz aKHz[MIN MAX озв 1298 сте 4CH 2CH
— en —— ROCK 6 dess (O)
INPUT MODE SWITCH
IN 4CH POSITION
5 Channel Amp with 5 Channel Input
If your head unit has three pairs of RCA outputs, input Front Left and Front Right in to amplifier channels 1 and 2 input jacks. Rear Left and Rear Right in to amplifiers channels 3 and 4 input jacks.
Subwoofer output in to channel 5. If your head unit has only a single subwoofer output, use a Y adaptor to feed both channel 5 inputs. Set the Input Mode Switch to 5Ch. The amplifiers preamp
circuitry will automatically mix all the channels and output will occur on all 5 channels. There will be Left and Right balance, Front to Rear fader with independent subwoofer.
SUBWOOFER OUT
SOURCE
INPUT —— ems ——
CH1 CH3
POWER
HPF X-OVER O
SUBSONIC
. .
50Hz
BASS EQ
° РВОТЕСТ
15Hz 4KHz
HPF X-OVER LPF
INPUT MODE
5CH 4CH 2CH
MAX 0dB 12dB
o
15Hz 4KHz
dB55 NO
INPUT MODE SWITCH
IN 5CH POSITION
10
5 Channel Amp Speaker Wiring
Minimum impedance for channels 1 through 4 is 2 ohm stereo.
COMPONENT SPEAKERS
MINIMUM IMPEDANCE
2-4 OHMS
Channel 5 minimum impedance is 2 ohm mono capable.
INPUT
CH5
©
50Hz О
INPUT MODE SET im)
TO 5 CHANNEL
os em 5CH 4CH 2CH
dB55
3- + EH
series RIDGED4 - OM
— BRIDGED4- С HM
© @cH1- HCH CH5 + FUSE +12V REM GND
O O
00 db > О
SUBWOOFER
2 ONO
O
Q ROCKVILLE deB55 O)
COMPONENT SPEAKERS
MINIMUM IMPEDANCE
4 OHMS
COMPONENT SPEAKERS
MINIMUM IMPEDANCE
4 OHMS
SUBWOOFER
MINIMUM IMPEDANCE
2-4 OHMS
11
4 Channel Amp with 4 Channel Input
If your head unit has two pairs of RCA outputs, input Front Left and Front Right in to amplifier channels 1 and 2 input jacks. Rear Left and Rear Right in to amplifiers channels 3 and 4 input jacks. The
amplifiers preamp circuitry will automatically mix all the channels and output will occur on all 4 channels. There will be Left and Right balance and Front to Rear fader.
SOURCE
© Power ©
© PRoTECT
° . FULL HPF LPF/BPF
HPF (SUBSONI) coller
и X-OVER
e . e . | | | . .
15Hz 1KHz 50Hz 3KHz FULL HPF LPF/BPF 0dB 12dB
ROCKVILLE —emeem dB45 [OQ
13
4 Channel Amp Speaker Wiring
Install any combination of speakers independently on all 4 channels being careful not to load any single channel below 2 ohm stereo. For typical 6” x 9” or 6.5” or component speaker
installs, set the Crossover Mode Switches to Full Range.
INPUT — nn ———
CH1 CH3
© LEVEL HPF(SUBSONIC) LPF O Power ©
(1) (1) (1) O PROTECT
O MIN MAX 15Hz 1KHz 50Hz ЗЧ FULL HPF LPF/BP BASS
LEVEL HPF (SUBSONIC) X-OVER QUALIZER
CH2 CH4 MIN MAX 15Hz 1KHz FULL HPF LPEgÉP 0dB 1208
© ROCKVILLE dB45 ©
FRONT SPEAKERS |
CROSSOVER MODE SWITCHES
IN FULL RANGE POSITION
+12V REM GND
O
O
à
2
a
wo
a Ш
352
Zn
SL
=
Sas
Q ROCKVILLE dBA5
REAR SPEAKERS
4 Channel Amp in 3 Channel Mode
Channels 1 and 2 should be wired to speakers no lower than 2 ohm loads per channel in stereo. Channel 3 and 4 should be bridged as per the diagram wiring the woofer to
channel 3’s positive (+) terminal and channel 4’s negative ( —) terminal. Set the crossover mode switch of channels 1 and 2 to either Full Range or High Pass, while channels 3
and 4 should be set to Low Pass.
CHANNEL 1-2 CROSSOVER
SWITCH TO FULL OR HPF
INPUT я
CH1 CH3
LEVEL HPF(SUBSONIC)
© O Power ©
(D (1) (M QO Protect
О MIN MAX 15Hz 1KHz 50Hz 3KHz yr LPF/BPF BASS
a) VON (1) хай EQUALIZER
CH2 CH4 MIN MAX Hz 1K Hz SK 0dB 1208
© ROCKVILLE dB45 ©
U
LEFT RIGHT
SPEAKER hB SS —— SPEAKER CHANNEL 3-4 CROSSOVER
2-4 OHM 2-4 OHM SWITCH TO LPF
> BhRIVOEL
© JCH1 CH FUSE +12V REM GND O
OQ OQ,
olf 7
© B | Roc —
| | SUBWOOFER
MINIMUM IMPEDANCE
4 OHMS
«> 15
O
MINIMUM IMPEDANCE O
2-OHM STEREO
4-OHM MONO
Q@rockviLLe dBas [©
4 Channel Amp Bridged to 2 Channels
When bridging the four channel amplifier, make sure that your final woofer impedance on each bridged channel is no lower than 4 ohms. Set the Channel 1 and 2 Crossover Mode
Switch to LPF; set the Channel 1&2 and Channel 3&4 Crossover Mode Switches to LPF. Begin by setting the crossover frequency controls to 100Hz and tuning from there.
CHANNEL 1-2
CROSSOVER
SWITCH TO LPF
INPUT
| 00
LEVEL HPF (SUBSONIC) LPF
QO Power ©
O
PROTECT
O MIN MAX 15Hz 1KHz 50Hz 3KHz BASS
(1) D © EQUALIZER
CH2 CH4 MIN MAX я К E d ов 1208
© ROCKVILLE dB45 ©
LEFT SUBWOOFER
MINIMUM IMPEDANCE | | |
4 OHMS 0
CHANNEL 3-4
| | CROSSOVER
SWITCH TO LPF
lon BRIDGED сна]
© CH1 - + СН2 FUSE +12V REM GND O
© OR o
y
do
Se q °
- Sis
O de | are HH 239 Q ROCKVILLE dBA5 [©
RIGHT SUBWOOFER
MINIMUM IMPEDANCE
16 LL
4 Channel Amp with Mixed Mono
CHANNEL 1-2 CROSSOVER
SWITCH TO HPF
INPUT
© CHI CH3 LEVEL HPF(SUBSONIC) LPF (О Power
SUBWOOFER (1) O PROTECT
MINIMUM IMPEDANCE O MIN MAX 15Hz 1KHz 50Hz 3KHz BASS
8 OHMS LEVEL HPF (SUBSONIC) LPF EQUALIZER
com asa (D)
FILTER INDUCTOR CH2 CH4 MIN MAX 0dB 12dB
00 © ROCKVILLE dB45
U
LEFT FRONT SPEAKERS RIGHT
SPEAKER SPEAKER CHANNEL 3-4 CROSSOVER
4 OHM 4 OHM SWITCH TO LPF
Fon MN cel FUSE +12V REM GND O
ag 4 Lo o COMPONENT
© © a VALUES FOR
z 6dB PASSIVE
о o ? e O CROSSOVER
CH3 CH4 Е? Е 4 OHM
= + 2
© dB BRIDGED ыы £33 Q ROCKVILLE dB45 O FREQUENCY INDUCTOR
| | | | 80 Hz 16 mH
100 Hz 13 mH
120 Hz 11 mH
SUBWOOFER 150 Hz 9 mH
MINIMUM IMPEDANCE
CE 4 OHMS
17
4 Channel Amp with Dual Mixed Mono
SYSTEM A
SUBWOOFER
MINIMUM IMPEDANCE
8 OHMS
ALL CROSSOVER SETTINGS
FRONT SPEAKERS MD |
\
LOW PASS
IN THIS MODE SHOULD BE
SET TO FULL RANGE.
LEFT FILTER INDUCTOR RIGHT
SPEAKER I + SPEAKER When configuring mixed mono systems, wire either
4 OHM = - 4 OHM using SYSTEM A or SYSTEM B depending on the use of
external passive crossovers.
RIDGED
© CH1 CH2 FUSE +12V REM GND ©
5 6 & 8&0 o
y
<
890
© © © |255 O
O Зо 2
CH31 chal E ES
| | =3 O
© dB | bance)*| =33 Q ROCKVILLE dB45
AC CAPACITOR COMPONENT
LEFT RIGHT VALUES FOR
SPEAKER SPEAKER 6dB PASSIVE
4 OHM 4 OHM
LOW PASS HIGH PASS FILTER CROSSOVER
FILTER INDUCTOR CAPACITOR 4 OHM
| FREQUENCY INDUCTOR
SYSTEM B SUBWOOFER 80 Hz 46 mH
REAR SPEAKERS MINIMUM IMPEDANCE 100 Hz 13 MH
8 OHMS 120 Hz 11 mH
1 8 150 Hz 9 mH
2 Channel Amp Configurations
2 Channel Amp Input
Connect your head unit’s RCA outputs to the amplifiers Left and Right RCA input jacks. The dB25 2 channel amplifier features RCA pre-amp line outputs for feeding of a full-range signal to a
secondary full-range amplifier in a multi-amp system.
SOURCE
OUTPUT INPUT
L HIGH LOW POWER
5 PASS PASS X-OVER O ©
O В 1248 60Hz 1.2KHz 50Hz 250Hz FULL LOW HIGH PROTECT
R R
5 Q ROCKVILLE dB25 |6)
Qroexvnce
dB25 ©
20
2 Channel Amp Speaker Wiring
Install any two or four speakers being careful not to load either channel below 2 ohm stereo. For typical 6” x 9” or 6.5" speaker installs, set the Crossover Mode Switch to Full Range. If you
are using a system with a sub we recommend setting the crossover switch to high pass.
— BRIDGED ——
+ L - + R - +12V REM GND
O
Q ROCKVILLE dB25
e
FULL LOW HIGH TECT
° . . e
60Hz 1.2KHz — 50Hz 2501
LEFT FRONT RIGHT FRONT
SPEAKER SPEAKER LLE dB25 ®
4 OHM 4 OHM
CROSSOVER SWITCH SET TO FULL OR HIGH
O
Q ROCKVILLE dB25
RIGHT REAR
LEFT REAR
SPEAKER SPEAKER
4 OHM 4 OHM
21
2 Channel Amp Subwoofer Wiring
Install any subwoofer being careful not to load the amp below 4 ohm mono. Set the Crossover Mode Switch to Low.
X-OVER
FULL LOW HIGH PO
. . . e
60Hz 1.2KHz — 50Hz 250
o
Q ROCKVILLE dB25
MINIMUM IMPEDANCE:
2-OHM STEREO
4-OHM
dB
series
SUBWOOFER
MINIMUM IMPEDANCE
4 OHMS
22
Features
Bass Equalization Circuitry
A narrow “Q” peaking equalization circuit is included in the amplifiers. The equalization system is preset at 456Hz. The equalizer control allows you to add up to 12dB of bass boost.
Utilize the bass equalizer to tailor your bass response to your systems needs. Make sure your speakers can handle the extra power output! It would be foolish to add 12dB of gain to
low excursion 8” and 10” Sub woofers or mid ranges and tweeters. It’s a sure way to blow your speakers.
Power And Protection Circuitry
dB Series amplifiers feature our unique IC controlled protection circuitry. This sophisticated circuit constantly monitors the heat sink internal temperature and various voltages, adjusting
the amp automatically and protecting it from dangerous conditions. The 2 LED’s located on the side of the amplifier provide indication of the amplifier status, the Power LED will light
when the amplifier is receiving proper power, ground and remote voltages and the IC monitoring sequence indicates the amp is functional. In case the amplifier encounters a diagnostic
condition as listed below, the second LED will light indicating a Diagnostic condition. When a diagnostic condition is sensed the amplifier will then turn into a self preservation mode and
if the cause of the diagnostic condition is not corrected will eventually shut down. There are certain critical diagnostic conditions which will turn the amplifier off immediately.
Thermal Protection: When the amplifier reaches an unsafe operating temperature of 80 degrees Celsius the amplifier will turn off.
Once the amplifier cools down to a safe temperature, it will automatically turn on again.
If you live in a hot climate we suggest installing additional cooling fans in your trunk to exhaust the hot air which can build up in the trunk this will help keep the ambient temperature in
the trunk as low as possible so that your amps work flawlessly and without any musical interruption.
Speaker Short Circuit Protection: Should your speakers short circuit due to voice coil burn out, or should the amplifier sense an impedance too low to handle, the Protection LED will light, indicating
a diagnostic condition. Turn off your system, disconnect one speaker at a time and try to determine which speaker might be faulty. Correct the condition and restart the amplifier. You must reset the
amplifier by turning it OFF and then ON again by the Remote power connection after correcting a diagnostic condition. (Turn your radio off and then on again.)
Clipping or total shutdown may also be a result of a bad ground connection or loose ground. If you find that your speakers and speaker wires are not shorted, please check
your ground and power connections.
Input Overload Protection: This circuit will either shutdown the amplifier completely or make the amplifier spurt on and off indicating that it is in a diagnostic condition. Turn the system
off and reduce the gain on the amplifier or volume from your head unit, this should result in a corrected condition.
DC Offset Protection: Should any DC voltage try to enter the amplifier via the speaker terminals it will cause the amplifier to shut down and not operate until this condition is remedied.
This circuit will also protect damaging high DC voltages from reaching your speakers should your amplifier ever malfunction.
You must reset amplifier by turning it OFF and then ON again after correcting a diagnostic condition (turn your radio off and then on again). If the amplifier stays in protection after a
reset, it is most likely faulty.
To reset the amplifier, you must first diagnose what caused the problem, correct the fault and restart the system.
24
Features
Mute Circuit
dB Series amplifiers feature an anti-thump, mute and delay circuit. This eliminates irritating speaker damaging turn-on and turn-off transients normally experienced with less expensive
amplifiers.
Battery Voltage
Rockville dB Series amplifiers are rated and regulated to 13.8 volts and below. Increasing voltage to 14.4 volts will increase the power output of the amplifier in the same proportion.
Maximum input voltage is 14.4 volts while the minimum voltage is 12 volts.
DO NOT EXCEED 14.4 INPUT VOLTAGE.
25
Specifications
26
dB55 5 Channel Amplifier
CEA Power Ratings:
2 Ohm: 120 Watts x 4 + 500 Watts <1% THD+N
4 Ohm: 80 Watts x 4 + 300 Watts <1% THD+N
RMS Power Ratings:
2 Ohm: 240 Watts x 4 + 1000 Watts
4 Ohm: 160 Watts x 4 + 600 Watts
Peak Power:
2 Ohm: 480 Watts x 4 + 2000 Watts
4 Ohm: 320 Watts x 4 + 1200 Watts
Dynamic Power: 4000 Watts
Minimum THD at Rated Power: < 0.05%
Frequency Response: 15Hz — 35KHz
S/N Ratio: >90dB
Damping Factor: > 100 @ 100Hz
3x 40 Amp Fuses
Dimensions: (Wx Hx L) 9x 2.4" x 18.6”
High-Speed MOSFET Power Supply
Optical Coupler Class “AB” + “D” Technology
Studio-Grade Bipolar Output Stage Transistors
Rugged switching MOSFETS for Class D in CH5
Fully Adjustable 12dB/Octave Crossover with
Differential Circuitry
Low Pass: (Ch3 — Ch4) 40Hz — 4KHz
(Ch5) 50Hz — 250Hz
High Pass: (Ch1 — Ch4) 15Hz — 4KHz
Subsonic Filter: (Ch5) 15Hz — 50Hz
Fully Adjustable 12dB Bass Equalizer
Mute and Delay Soft Start System
Remote Dashboard Subwoofer Control
e Full IC-Controlled Protection Circuitry
e Status Mode LED Indicator
* 8 Volt Preamp Circuitry
dB45
CEA Power Ratings
2 Ohm: 200 Watts x 4 Channels <1% THD+N
4 Ohm: 135 Watts x 4 Channels <1% THD+N
4 Ohm Bridged: 400 Watts x 2 Channels <1% THD+N
RMS Power Ratings:
2 Ohm: 400 Watts x 4 Channels
4 Ohm: 270 Watts x 4 Channels
4 Ohm Bridged: 800 Watts x 2 Channels
Peak Power:
2 Ohm: 800 Watts x 4 Channels
4 Ohm: 540 Watts x 4 Channels
4 Ohm Bridged: 1600 Watts x 2 Channels
Minimum THD at Rated Power: < 0.05%
Frequency Response: 10Hz - 50KHz
S / N Ratio: >90dB
Damping Factor: > 150 @ 100Hz
3x 35 Amp ATC Fuses
Dimensions: (Wx H x L) 9° x 2.4 x 21”
High-Speed MOSFET Power Supply
Optical Coupler Class “AB” Technology
Studio-Grade Bipolar Output Stage Transistors
Fully Adjustable 12dB/Octave Crossover with Differential Circuitry
Low Pass: 50Hz — 3KHz
High Pass: 15Hz — 1KHz
Fully Adjustable 12dB Bass Equalizer
Mute and Delay Soft Start System
Full IC-Controlled Protection Circuitry
Status Mode LED Indicator
8 Volt Preamp Circuitry
Specifications
dB25
* CEA Power Ratings:
2 Ohm: 350 Watts x 2 Channels <1% THD+N
4 Ohm: 230 Watts x 2 Channels <1% THD+N
4 Ohm Bridged: 700 Watts x 1 Channels <1% THD+N
RMS Power Ratings:
2 Ohm: 700 Watts x 2 Channels
4 Ohm: 460 Watts x 2 Channels
4 Ohm Bridged: 1400 Watts x 1 Channel
Peak Power:
2 Ohm: 1400 Watts x 2 Channel
4 Ohm: 920 Watts x 2 Channel
4 Ohm Bridged: 2800 Watts x 1 Channel
Minimum THD at Rated Power: < 0.05%
Frequency Response: 10Hz — 100KHz
S / N Ratio: >90dB
Damping Factor: > 100 € 100Hz
3x 30 Amp ATC Fuses
Dimensions: ( W x HxL)9x2.4x 19.4”
High-Speed MOSFET Power Supply
Optical Coupler Class “AB” Technology
Studio-Grade Bipolar Output Stage Transistors
Fully Adjustable 12dB/Octave Crossover with Differential Circuitry
Low Pass: 50Hz — 250Hz
High Pass 60Hz — 1.2KHz
Fully Adjustable 12dB Bass Equalizer
Mute and Delay Soft Start System
RCA Line Output
Full IC-Controlled Protection Circuitry
Status Mode LED Indicator
8 Volt Preamp Circuitry
27
Woofer Wiring Guide
Please note that the minimum impedance load for single dB Series Amplifiers is 2 ohm stereo and 4 ohm mono bridged.
Lower impedance loads will cause overheating and may damage the amplifiers.
Do not mix different impedance speakers in series and/or parallel combinations, as unequal power sharing and acoustic outputs will result.
SVC configurations
PARALLEL
ONE 20 SVC WOOFER = 20) LOAD
20
—
20 € AMP
—O
20
TWO 20 SVC WOOFER = 40 LOAD
| | 20 20
40 @ AMP
о E %
28
PARALLEL
ONE 40 SVC WOOFER = 40 LOAD
40)
—Y
40 @ AMP
40
PARALLEL
TWO 40 SVC WOOFER = 20 LOAD
© &
20 @ AMP -0 (e)
Cu Ge
FOUR 20 SVC WOOFER = 20 LOAD
© & 20 S 20
Q © 9% ©,
AO
FOUR 40 SVC WOOFER = 40 LOAD
& © 40 S 40
Q 97 ©, © ©.
PARALLEL
FOUR 80 SVC WOOFER = 20 LOAD
© © © ¢ 68
Le Se
29
Woofer Wiring Guide
Please note that the minimum impedance load for single dB Series Amplifiers is 2 ohm stereo and 4 ohm mono bridged.
Lower impedance loads will cause overheating and may damage the amplifiers.
Do not mix different impedance speakers in series and/or parallel combinations, as unequal power sharing and acoustic outputs will result.
PARALLEL |
DVC configurations
ONE 20 DVC WOOFER = 40 LOAD ONE 40 DVC WOOFER = 20) LOAD
20
40
40 @ AMP 20 @ AMP
20) 40
SERIES/PARALLEL SERIES/PARALLEL
TWO 20 DVC WOOFER = 20 LOAD TWO 40 DVC WOOFER = 40) LOAD
© do 6 © Go &
-0)0) -00
TL B® ed Q_ GE
30
SERIES/PARALLEL
FOUR 40 DVC WOOFER = 20 LOAD
© 0 do do, di
3008
© 9 QP YO Y
CTS
FOUR 20 DVC WOOFER = 40 LOAD
31
ROCKVILLE
©2019 ROCKVILLE // Features and specifications are subject to change and or improvement without notice. Though we
tried our best to ensure that this manual is free and clear of errors please don’t hold us responsible for printing errors.

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