ZRS C4 QUICK INSTALLATION GUIDE
REMOTE TURN-ON
FROM HEAD UNIT
POWER CONNECTION REQUIREMENTS:
MINIMUM 4 GAUGE CABLES.
GROUND CONNECTION CABLE SHOULD USE SAME GAUGE
WIRE AS POWER CABLE. KEEP GROUND CABLE AS
5
SHORT AS POSSIBLE. ALL AMPLIFIERS IN A MULTI-AMP
INSTALLATION SHOULD GROUND TO THE SAME
LOCATION TO AVOID GROUND LOOPS.
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 ZRS Seriesamplifier with our exclusive two-year warranty which exemplifies
our commitment to excellence in car audio musical reproduction. (See enclosed warranty
card for details.)
Please read this installation guide carefully for proper use of your Cadence power amplifier.
Should you need technical assistance during or after your installation please call our
technical-line between 9:30 am and 5:00 PM EST at 732/370-5400. Read this entire guide
fully before attempting your installation.
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. Playing
Cadence amplifiers at high volume levels while driving will impair your ability to hear
necessary traffic sounds. While driving always keep your sound volume at reasonable
levels. We at Cadence 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.
We suggest you construct a Red wiring harness with 2 additional fuse. One fuse should be
located near the car battery. This fuse near the battery offers protection against damage
from short circuits to the car chassis between the battery and the amplifier. A second fuse
closer to the amplifier offers additional safety to the amplifier itself. This fused red power
wire should be attached to the amplifier power terminal marked 12V+.
The wire harness should be made of primary cable of at least 4 gauge. The harness should
terminate in a large ring terminal for connection directly to the positive terminal of the car
battery. Use a spade plug to attach the wire, which connects to the amplifier location
marked 12V+.
A second black color wire of equal gauge should be used as a ground connection to a
welded chassis member. 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. Attach the
black ground wire to the amplifier screw terminal marked Ground.
We recommend that you use the Cadence amplifier installation kits, which contain all the
cabling and accessories necessary for a good, reliable installation.
Over the years we have received amplifiers back to our service department with melted
power/ground terminals. The cause of this is a bad ground connection. When there is a lack
of good ground, heat builds up at the weakest point which happens to be the contact screw
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 with your hands, near their amplifier
connection after having played the amp for a while. If the wires feel hot to the touch you
probably have a bad or loose connection. If you are sure of your connections and the wires
still feel hot to the touch, you should upgrade the gauge of wire to next heaviest gauge.
The remote turn on connection is located on the barrier strip next to the power and ground
connections. This connection is responsible for turning the amplifier on and off with the rest
of the system. A smaller gauge wire can be used to make this connection to your radio's
power antenna lead. Should your system not have any turn on leads, you can wire the
remote terminal to an accessory lead, which turns on, with your cars ignition.
The ZRS Series amplifiers feature RCA preamp inputs. Run RCA cables from your sound
source to the inputs of the amplifier. We suggest the use of high quality shielded RCA patch
cords to help reduce and eliminate unwanted electrical noise to your system.
To avoid electrical noise from being injected in to your sound systems be sure to run the
RCA cables on the opposite side of the vehicle that you used to carry the power and ground
leads of the amplifier.
100 AMP FUSE
4 GAUGE MINIMUM FOR 4-OHM BRIDGED OR 2-OHM STEREO
HIGH POWER INSTALLS. YOU MUST INSTALL AN ADDITIONAL
100 AMP IN-LINE FUSE IN THE MAIN POWER CABLE
CONNECTION.
ZRS Type C4 - 4 Channel High Power Amplifier
4-Ohm Power:
2-Ohm Power:
4-Ohm Bridged:
2 x 900 Watts = 1800 Watts Max
IHF-2002 Peak Power:
Damping Factor:
Preamp Input Voltage:
Low Pass Crossover:
High Pass Crossover:
Crossover Slope:
Band Pass Control:
Minimum THD:
Frequency Response:
Dimensions:
4 x 150 Watts RMS
4 x 225 Watts RMS
2 x 450 Watts RMS
>500 @ 100Hz
300mV to 7Volt
30Hz-300Hz
10Hz-300Hz
12dB + 24dB
YES
<0.1%
10Hz - 40Khz +/- 3dB
9.6” x 2.32” x 22” (243x59x554mm) W/H/L
ZRS C4 ZRS C4
To amp -
4-Ohm Bridged Mono
4-Ohm
Single Voice Coil
Or
DVC 2-Ohm
Wired in Series
to 4-Ohm
To amp +
Configuration
To amp +
To amp -
Midrange
DVC 2-Ohm
Wired in Series
to 4-Ohm
Or
Midrange
When bridging the ZRS C4, minimum
impedance per channel is 4 ohm mono
bridged. When using DVC 2 ohm
woofers, voice coils must be wired in
series to 4 ohm.
4-Ohm
Single Voice Coil
3-Channel
Configuration
Tweeter
Crossover
Tweeter
Crossover
Channels 1 and 2 to Front Left + Front
Right component speakers with channels
3 and 4 bridged to 4 ohm mono load.
Channels 3 and 4 can be bridged to one
4-Ohm mono woofer.
Two 2-Ohm woofers can be used for
Stereo bass on Channels 3 and 4.
4-Ohm
Single Voice Coil
Or
To amp +
To amp -
DVC 2-Ohm
Wired in Series
to 4-Ohm
Midrange
Midrange
Tweeter
Crossover
Tweeter
Crossover
4-Channel
Configuration
6x9 or 6.5” Speakers
Channels 3 and 4 Rear
Tweeter Tweeter
4-Ohm
4-Ohm Tweeters in Parallel4-Ohm Tweeters in Parallel
Tweeter Tweeter
Channels 1 and 2 to Front Left + Front Right
Component Speakers.
Channels 3 and 4 to Rear Left + Rear Right
Component Speakers, 6” x 9” Speakers or
6.5” Speakers. Minimum Impedance 2 ohms
per channel.
Multi-Speaker
2-Ohm
Stereo
Crossover Crossover
Load
2-Ohm
Stereo
Load
Configuration
8-Ohm
Midrange
4-Ohm
Midrange
8-Ohm
Midrange
8-Ohm
Midrange
4-Ohm
Midrange
8-Ohm
Midrange
4-Ohm
Midrange
8-Ohm
Midrange
8-Ohm
Midrange
4-Ohm
Midrange
8-Ohm
Midrange
8-Ohm
Midrange
Eight 8-Ohmspeakers installed in parallel or
Four 4-Ohm speakers installed in parallel.
Do not mix impedances and do not run amp
below 2 ohm stereo load per channel.
ZRS C4 CONTROLS
4-Channel Band Pass Configuration.
The ZRS C4 features a unique band pass system where by channels 1 and 2 can be configured to a band pass system while separately
setting channels 3 and 4 to their own band pass frequencies. This band pass system is especially useful when installing multiple midrange
and tweeter speakers. Please see below for detailed instructions.
Set Channels 1 and 2 Crossover Switch to BPF (Band
Pass Filter) and adjust the HPF (High Pass Filter) knob to
the frequency you wish to choose to block low frequency
signals. In the drawing below we set the knob to
approximately 30Hz. Set the LPF (Low Pass Filter) to the
frequency you wish to choose to block high frequency
signals, we chose 300Hz. Now channels 1 and 2 will only
play signals between 30Hz and 300Hz.
RCA PREAMP
INPUT
High end Ti ffany Styl e RCA
connectors are used for the preamp
inputs ensuring tight loss-less signal
connections for ensured high fidelity.
GAIN CONTROL
Set Channels 3 and 4 Crossover Switch to BPF (Band
Pass Filter) and adjust the HPF (High Pass Filter) knob to
the frequency you wish to choose to block low frequency
signals. In the drawing below we set the knob to
approximately 30Hz. Set the LPF (Low Pass Filter) to the
frequency you wish to choose to block high frequency
signals, we chose 300Hz. Now channels 1 and 2 will only
play signals between 30Hz and 300Hz.
INPUT
HEAVY DUTY
HEATSINK
The ZRS C4 amplifies
features advanced input
gain control from 0.3 volts
to 7 volts so that it can
operate efficiently and at
full power from any head
unit pre amp signal.
Super heavy-duty heatsink
guarantees that your amplifier
will stay cool no matter how
h a r d y o u p o u n d i t .
C o mp u te r i z e d t he r ma l
protection circuitry guarantees
the amplifiers stability.
The Band Pass Setting is especially useful when setting
up component speakers where you want to activly block
low frequencies from reaching your midrange speakers
and tweeters and for multiple midrange speaker
installations. When using a 3-way amplifier system
installation, the ZRS C4 is the perfect midrange/midbass
power amplifier.
4-Ohm
Midrange
4-Ohm
Midrange
4-Ohm
Midrange
4-Ohm
Midrange
POWER & DIAGNOSTIC
LED INDICATORS
ZRS amplifiers feature
s o p h i s t i c a t e d I C
cont r o lled prote c t i on
circuitry. If the amp goes
i n t o a d ia g n o s t ic
condition from thermal
over load or speaker short
circuit the LED will light
and amp will shut down.
12dB HIGH PASS
CROSSOVER SLOPE
Channels 1 and 2 electronic crossover features
sophisticated 12dBHigh Pass filter circuitry. The 12dB
filter ensures a more gradual cutoff necessary for front
speaker stages and tweeters where frequency overlap
is critical for high quality sound reproduction,
Before you begin with your installation, disconnect the NEGATIVE (-) terminal from your car's battery. This safety precaution will avoid possible short circuits while wiring your amplifier.
Cadence amplifiers operate on 12-volt negative ground systems only.
It is recommend 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.
Once the system is operational, the first thing to do, is set all crossover points to approximate settings. In the case of the basic sub woofer system Low Pass filter crossover at 100 Hz or so.
Set the Bass Boost equalizer controls to 0 dB ( Flat Switch Position.)
Now you should set the amplifiers Input Sensitivity adjustment. The knob accessible on the side of the amplifier marked INPUT GAIN adjusts the input sensitivity from 300mV to 7Volts.
To adjust the input sensitivity, turn the control using a small flat head screwdriver fully counter clock wise to the minimum position. Do not apply any pressure while turning as this might
break the control unit. Adjust your radio volume level to maximum volume. Now turn the level control on the amplifier clockwise towards the Maximum marking until audible distortion
occurs. When you begin to hear any 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 gain separately. Start off with the bass amplifier, then adjust the highs amplifier’s level control to match.
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 amplifiers level controls.
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 gain to maximum unless your input level requires it.
If your unit has been professionally installed please do not change the gain settings set by the installer, he is the professional!
Your system can also be extremely sensitive to noise when the LEVEL is set to maximum and does not match your input signal. The gain adjustments need to be made only once when first
setting up the system.
Channels 3 and 4 electronic crossover features
sophisticated Linkwitz-Riley 24dB Low Pass filter
circuitry. The 24dB filter ensures a steep cutoff of high
frequencies and assists the amplification circuitry
emphasize its power output in the set frequency range
thereby increasing the audio spectrums headroom.
24dB LOW PASS
CROSSOVER SLOPE
The ZRS C4 features heavy duty bolt down terminals,
the power and ground terminals accept 4 gauge wire
while the speaker terminals can accept 10 gauge wire.
CONNECTION
TERMINALS
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