MONO CLASS D AMPLIFIERS
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FEATURES
3
GOLD PLATED TERMINALS:
BASS DRIVE EQUALIZATION CIRCUITRY:
All the terminals on the amplifier are solid brass and satin nickel plated for high conductivity
and minimum impedance loss. The power and ground terminals are extra large and capable
of accepting 2 gauge wire. The speaker terminals can accept 8 gauge wire. When wiring the
amplifier, be sure to strip just enough wire that fits into the terminal so that bare wires do not
touch each other, or the amplifier chassis and cause a short circuit.
A narrow "Q" shelving equalization circuit is included in the amplifiers. The equalization
system allows you to choose the center frequency which you want to boost and also a
separate adjustable boost control. This boost control allows you to add up to 15dB of Bass
Drive effect. Utilize the Bass Drive to tailor your bass response to your systems needs.
Please keep in mind that adding Bass Drive you are adding stress on your speakers. Make
sure your speakers can handle the extra power output! It would be foolish to add 15dB of gain
to low excursion 8" and 10" subwoofers.
POWER AND PROTECTION CIRCUITRY:
Type RS amplifiers feature our unique IC controlled protection circuitry. This sophisticated
circuit constantly monitors the heatsink internal temperature and various voltages, adjusting
the amp automatically and protecting it from dangerous conditions. The 2 LEDs located on
the input side of the amplifier provide indication of the amplifier status, and the Power LED will
light Green 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 turn RED 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 off. There are certain critical diagnostic conditions which will turn the amplifier off
immediately.
“ADR”: - ACTIVE DYNAMIC REGULATION
Cadence RS amplifiers feature our proprietary ADR, Active Dynamic Regulated power
supplies. 100% HexFET devices are utilized in the power supply for high speed (100KHz)
switching frequencies. The power supplies are capable of supplying the main amplifier with a
considerable amount of reserve voltage for peak "high demand" situations. The ADR circuit
provides full bandwidth power for authoritative bass response, high current output into low
impedance loads and increased headroom. TheADR is supplied with power via a high speed,
high temperature capacitance bank and 100% pure copper rails on the PCB enabling fast
transientresponsetomusicaldemands.
1. Speaker short circuit.
2. Input Overload.
CLASS D AUDIO STAGE PERFORMANCE
3. Thermal overload.
4. Reverse Polarity.
The audio output section of the RS amplifiers feature high speed high voltage, low Rdson
MosFET transistors. This design contributes to ultra low distortion and extreme high power
capabilities. Our proprietary Class D modulation scheme, in conjunction with a very carefully
designed output filter, ensure clean, accurate sound reproduction with authority for deep
slammingtruebass.YOUWILLHEARTHEDIFFERENCE.
To reset the amplifier, you must first diagnose what caused the problem, correct the fault and
restartthesystem. SeetheTroubleShootingpageforfurtherdetails.
STIFFENING CAPACITOR DIRECT CONECTION:
Aunique feature of the CadenceType RS amplifiers, is their direct capacitor connection to the
amplifier's internal power supply.As you know, the speed in which the reserve capacity of any
stiffening capacitors reaching the amplifier's power supply is critical. You want this reserve
voltage to be immediately available upon your amps hitting a bass note. Our terminal
connection puts the negative of the capacitor in direct line with the negative terminals of the
power supply MosFET's and the positive of the capacitor with the center tap of the power
supply transformer coil. In essence, it's like your amplifier having its own personal battery.
MUTE CIRCUIT:
Boom
!
The RS amplifiers feature an anti-thump, mute and delay circuit. This eliminates irritating and
speaker damaging turn-on and turn-off transients normally experienced with less expensive
amplifiers.
Harder
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4
FEATURES
AMPLIFIER MODE SWITCH
INDUCTION AND TUNNEL FAN COOLING:
This switch enables you to slave multiple RS amplifiers off one master. Input signal will be
connected to the master in a system, and then a PM2 bridging cable can be used to connect
the master out to the slave in of a second amplifier, and in multiple amplifier systems, this
amplifier’s master output can be connected to a third amplifier’s slave input, thus allowing the
daisy chaining of an almost unlimited number of amplifiers from one signal source. In
addition, a single Competition Podium Remote control (CPR) can optionally be connected to
the master amplifier, in order to control all the slave amplifiers connected to it. Note that when
an amplifier is set in the SLAVE mode, its level control, phase shift, subsonic filter, bass EQ,
low pass filter, as well as remote control function will be totally bypassed, as these functions
will be controlled by the master amplifier to ensure perfect level and spectral matching
betweenallamplifiers.
Due to the extreme high power capabilities of these amplifiers, they feature a built-in
induction fan cooling system. The amplifiers draw in cool air through the nosepiece side
vents, for circulation across the circuitry.The main heatsink for the amplifier and power supply
sections is a CAD designed forced cooled tunnel that runs the length of the amplifiers.Afan at
each end, one pulling air in, and the other forcing air out, ensure that the power electronics
stay cool for continued, clean operation. It is important not to block either the input or exhaust
ports. Some of our competitors are more interested in making a quick buck and will purposely
leave the fan out of their amps and then charge you a hefty sum to buy and add the fan on
later.At Cadence, if we feel that our amplifiers will work better with a fan then we install it at the
factory and don't make it an expensive add on option.
PROTECTION CIRCUITRY:
Cadence amplifiers incorporate many outstanding protection circuits to help protect the
amplifier from being damaged during operating conditions.
Thermal Protection: When the amplifier reaches an unsafe operating temperature of 80
degrees Celsius the amplifier will turn off. Once the amplifier cools down, simply reset the
amplifier by its Remote connection, (turn the amplifier off and then on again once you have
given the amplifier a chance to cool down) and the amp will once again begin to play.
“ARVA” - AUTOMATIC RAIL VOLTAGE ADJUSTMENT CIRCUITRY:
Cadence RS amplifiers feature "ARVA" circuitry in their power supply. This circuit constantly
monitors the output stage and under high current demands will adjust the power supply rail
voltages so that enough power is available for peak situations. The "ARVA" also improves the
damping factor of the amplifier when playing low impedance mono loads. Cadence Type RS
amplifiers have tighter sounding bass reproduction thanks to this unique circuitry.
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 off and then on by the Remote power for
proper operation after correcting a diagnostic condition.
BATTERY VOLTAGE:
Cadence RS 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 16 volts while the minimum voltage is 12 volts.
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
connection.
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 miss-function.
Boom
!
Harder
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INSTALLATION BASICS
5
INSTALLATION BASICS:
REMOTE TURN ON CONECTION:
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.
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 ignition.
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.
STIFFENING CAPACITOR DIRECT CONNECTION:
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 heatsink so that it can dissipate the heat it produces efficiently. The amplifier can be
installed either horizontally or vertically.
The benefits of this feature have been described earlier in the Features section. Connect the
Positive terminal of the capacitor to the terminal marked (+) on the amp and the negative
terminal of the capacitor to the terminal marked (-). Use the heaviest gauge wire available for
this connection. We recommend using Cadence Extreme Series Power Capacitors due to
their industry leading low ESR rating. Multiple capacitors can be connected via BUS BAR
terminals for larger amplifier installations. Use a CAP-1DR per amplifier model ZRS-8, a
CAP2DRperamplifiermodelZRS-9, andaCAP5DRforamplifiermodelZRS-10.
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.
POWER/GROUND WIRING:
USING THE RS AMPLIFIERS IN CONJUNCTION
WITH A MULTI- CHANNEL AMPLIFIER:
The RS amplifiers are supplied with ANL fuse blocks, and we suggest you construct a Red
wiring harness with 1 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
powerterminalmarked 12V+.
The RS amplifiers are of course meant for sub bass applications, and as such need to be
usedinconjunctionwithasecondamplifierforacompletefullrangesystem.
RefertothewiringdiagramonPage6.
ConnecttheLineOutoftheRSamplifiertotheLineInputofamulti-channel amplifier.
The wire harness should be made of red 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+.
Set the multi-channel amplifier’s internal crossover to High Pass, as it will drive the high
frequency speakers, such as separates, coaxials, or plate type speakers, typically mounted
inthedoorsorkickpanels.
Mount a master fuse right at the battery + terminal as shown. Add up the current draw for all
amplifiersinthesystemtodeterminetheratingforthisfuse.
Asecond 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
wiretotheamplifierscrewterminalmarked Ground.
Use a power distribution block, such as the Cadence FH-1, FH-2 or FH-3 at the amplifier
locationtosupply+12volttoeachamplifier.
Connecttheremoteturnonsignalfromthesourcetoallamplifierremoteturnonterminals.
We at Cadence recommend that you use our ZIK-4 amplifier installation kit, which contains all
thecablingandaccessoriesnecessaryforagood, reliableinstallation.
Over the years we have received many an amp 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 is the contact screw of the 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 the wire to next heaviest gauge.
Boom
!
Harder
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6
MOUNTING
MOUNTING THE RS AMPLIFIERS:
Chooseaconvenientmountinglocationwithunobstructedairflow.
1 - Mount and fasten amplifier bracket A onto the mounting surface, with two screws as
shown.
2-SlidetheamplifiersothathookBengageswithbracketA.
3-Fastenthefrontoftheamplifiertothemountingsurfacewithscrewsasshown.
1
A
3
2
A
B
Boom
Harder
!
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BASIC SINGLE RS AMPLIFIER INSTALLATION WITH A 2ND AMPLIFIER FOR THE HIGHS
7
Mode switch
Line level
inputs from head unit
Ground
BURST
PR
POWER
FULL POWER
LEVEL
Remote turn on
BATTERY
VOLTAGE
-50 dB FULL
POWER
CPR Remote
Control
Fuse at battery
Woofer
1 ohm
minimum
Boom
Harder
Stereo RCA cable from RS LINE OUT
to highs amp LINE IN
Distribution
block
!
2 CHANNEL
HIGH FREQUENCY AMPLIFIER
Remote turn on
Master fuse
at battery
NOTE:
Set the HIGHS amplifier
crossover to HIGH PASS
Ground
High frequency speakers
Battery
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8
USING THE CPR REMOTE CONTROL WITH THE RS AMPLIFIERS
CPR(COMPETITIONPODIUMREMOTE)BASICS
The CPR is an optional unit and not included with the ZRS amplifiers. Please see your
dealer for pricing and availability of the CPR.
TheoptionalCPRremotecontrolcanbeusedforstreetorSPLcompetitionsalike.
Apart from the usual level control, it also sports a few extra features that SPL competitors
especiallywillfindhandy.
LEVELCONTROL:
With the level control in the Full Power, or fully clockwise position, the amplifier output will be
as set by the level control on the amplifier itself, in other words, no effect on the level. In the -
50dB, orminimumposition, theamplifieroutputlevelwillbeattenuatedby50dB.
BURSTBUTTON:
TheBURSTbuttonoverridesthelevelcontrolontheCPRinthefollowingmanner:
WhenthelevelcontrolisatFullPower, pressingtheBURSTbuttonwillhavenoeffectatall.
When the level control is set to -50 dB or any intermediate position, and the BURST button Is
depressed, the amplifier output will instantaneously jump up the level as determined by the
amplifier’slevelcontrol, regardlessofsetting.
DIGITALBATTERYVOLTAGEMONITOR:
Maintaining a properly charged battery system for competition purposes is critical, and with
the Digital Battery Voltage Monitor on the CPR, a competitor can conveniently check the
batterystatusduringburps.
POWERBARGRAPH:
The 5 LED Power Bar-Graph on the CPR indicates the relative amplifier power output in real
time, so that the competitor can be sure that the system is delivering as much power to the
speakersaspossible.
INSTALLATION:
Please refer to the wiring diagrams on pages 7, 10 and 11 on using the CPR with single, dual
mono bridged and multiple RS amplifier systems. Use the supplied 8 pin cable to connect it to
theappropriatejackontheamplifier.
Be sure to use the cable which came with the CPR. Do not substitute cables.
Boom
!
Harder
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ADJUSTING THE SYSTEM
ADJUSTING THE SYSTEM
9
SETTING THE TOP PANEL CONTROLS
Once the system is operational, the first thing to do, is set all crossover points to approximate
settings. In the case of the basic system described on Page 6, start off with the RS amplifier
Low Pass filter, and the highs 2 channel amplifier’s internal crossover at 100 Hz or so. Set all
equalizercontrolsto0dB
AUDIOPREAMPINPUT
The RS 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 from your system.
Now you should set the amplifiers LEVEL adjustment. The knob accessible on the top of the
amplifier marked Input Level adjusts the input sensitivity from 200mV to 9Volts.
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.
To adjust the input sensitivity, turn the control using a small flat head screwdriver fully counter
clock wise to the 9volt 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 200mV marking and until audible distortion
occurs. When you begin to hear any distortion in the sound back down one notch and your
ampisset. Itishelpfultohaveasecondpersontohelpyousetthegain.
AUDIOPREAMPOUTPUT
The RS amplifiers feature RCA preamp outputs which can be used to signal feed secondary
amplifiers in your system without the use and expense of "Y" adaptors. The preamp output is
fullrange.
USINGTHEBUILT-INLOWPASSELECTRONICCROSSOVER
AlltheRSamplifiersfeature24dBperoctavefullyadjustablelow-pass crossovers.
SetthefrequencyadjustmentknobmarkedLOWPASFILTERtoadjustthefilterfrequencies.
SUBSONICFILTERING.
When setting up a multi-amp system, set each amplifier’s gain separately. Start off with the
bassamplifier, thenadjustthehighsamplifier’slevelcontroltomatch.
Once you’re satisfied with the level control settings, use the equalizer controls to adjust the
system tonal level for personal preference. Keep in mind that after equalizing, you may have
togobackandresetthelevelcontrols.
Your RS amplifier is capable of subsonic filtering. This feature is useful for today's popular
bandpass or vented subwoofer enclosures. The subsonic filter acts as a High Pass crossover
blocking the unwanted signals from reaching specific speakers. This helps to control the
mechanical excursion of the woofers at very low frequencies, thus causing a cleaner sound,
better utilization of amplifier power and improved speaker reliability.
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
inputlevelrequiresit.
PHASESHIFTCONTROL
The Phase Shift control on the RS amplifiers allows you to adjust acoustical integration
between the sub bass and higher frequency speakers in a system.Adjust this control for best
audibleresults.
If your unit has been professionally installed please do not change the gain settings set by the
installer, he is the professional!
AMPLIFIERMODESWITCH
Your system can also be extremely sensitive to noise when the LEVELis 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.
This switch enables you to slave multiple RS amplifiers off one master. Set it to MASTER for
single RS amplifier, or first of a multiple RS amplifier systems. In multiple RS amplifier
systems, setthisswitchtoSLAVEforanyamplifiersslavedoffamaster.
Boom
!
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10
MONO BRIDGING 2 AMPLIFIERS INTO 1 WOOFER
MASTER/SLAVE CONNECTION DIAGRAM
Mode switch
IMPORTANT:
Link between 2 amplifier
- speaker terminals
#14 minimum
Ground
BURST
PR
POWER
2 ohm
minimum
FULL POWER
LEVEL
BATTERY
VOLTAGE
-50 dB FULL
POWER
Pm2
Cable
Distribution
block
Mode switch
Master fuse
at battery
NOTES ON MONO BRIDGING 2 RS AMPLIFIERS INTO ONE SPEAKER LOAD
AMPLIFIER MODE SWITCH, INPUTSAND REMOTE CONTROL
Set theAMPLIFIER MODE switches as shown
Ground
Battery
Connect the source to the master amplifier inputs, and an optional CPR remote control to the master, as shown.
Use a PM2 bridging cable to connect the master output of the first amplifier to the slave input of the second.
Connect the speaker as shown, with the link between the negative speaker terminals of the two amplifiers.
Connect the ground terminal with as short a piece of cable as possible to the nearest metal chassis point.
Mount a master fuse right at the battery + terminal as shown.Add up the current draw for all amplifiers in the system to determine the rating for this fuse.
Use a power distribution block, such as the Cadence FH-1, FH-2 or FH-3 at the amplifier location to supply +12 volt to each amplifier.
Connect the remote turn on signal from the source to all amplifier remote turn on terminals.
Boom
!
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SYSTEMS WITH MULTIPLE AMPLIFIERS
11
NOTES ON MULTIPLE AMPLIFIERS AND SPEAKER PHASE
MONO BRIDGING MULTIPLE PAIRS OF AMPLIFIERS
MONOBRIDGINGMULTIPLEPAIRSOFAMPLIFIERS
Mode switch
The phase of each monobridged speaker per amplifier pair is the same. See the diagram on
the right.
2ORMOREAMPLIFIERSWITHSEPARATESPEAKERSONEACH
Please note that for this type of setup, the speaker phase on every alternate amplfier MUST
be reversed in order to keep the acoustical phase of all speakers in the system in phase with
eachother. Seethediagrambelow.
Pm2
Cable
BURST
PR
POWER
2 ohm
minimum
IMPORTANT:
Link between 2 amplifier - speaker terminals
#14 minimum
FULL POWER
LEVEL
AMPLIFIERMODESWITCH, INPUTSANDREMOTECONTROL
BATTERY
VOLTAGE
-50 dB FULL
POWER
Mode switch
The first, or master amplifier switch in these arrangements will of course act as the master in
all respects. It will accept the input from the source via RCA cables, and its level control,
crossover and filters, as well as remote control, if connected, will control all slaves. Do not
forgettosettheamplifierModeswitchesasindicatedonalldiagrams.
Pm2
Cable
2 OR MORE AMPLIFIERS WITH SEPARATE SPEAKERS
Mode switch
Mode switch
1 ohm
Pm2
Cable
minimum
BURST
PR
POWER
2 ohm
minimum
Pm2
Cable
IMPORTANT:
Link between 2 amplifier - speaker terminals
#14 minimum
FULL POWER
LEVEL
BATTERY
VOLTAGE
-50 dB FULL
POWER
Mode switch
Mode switch
1 ohm
minimum
Pm2
Cable
IMPORTANT:
Note the reverse speaker phase on 2nd amplifier
To the Slave In of the next amplifier
Boom
To the Slave In of the next amplifier pair
IMPORTANT:
Reverse the speaker phase on every alternate amplifier
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12
BASIC SPEAKER WIRING DIAGRAMS FOR VARIOUS LOADS
NOTES ABOUT USING MUTLTIPLE SPEAKERS:
SERIES:
SINGLE VOICE COIL
SPEAKERS
SERIES:
DUAL VOICE COIL
SPEAKERS
Please note that the minimum impedance load for single Cadence Type RS amplifiers is 1 ohm.
If you choose to mono bridge two RS amplifiers into on load, the impedance should not be lower
than 2 ohm.
Lower impedance loads will cause overheating and may damage the amplifiers.
Do not use different type and different impedance speakers in the series and/or parallel
combinations shown, as unequal power sharing and acoustic outputs will result.
+
8 OHM
TO
AMPLIFIER
4+4
OHM
2 OHM
+
PARALLEL: SINGLE VOICE COIL SPEAKERS
-
4 OHM
TO
AMPLIFIER
-
+
+
2 OHM
2 OHM
TO
AMPLIFIER
1 OHM
TO
AMPLIFIER
4 OHM
4 OHM
2 OHM
2 OHM
-
-
+
4 OHM
TO
AMPLIFIER
2+2
OHM
-
+
1 OHM
TO
AMPLIFIER
4 OHM
4 OHM
4 OHM
4 OHM
4 OHM
-
+
8 OHM
TO
AMPLIFIER
+
2 OHM
TO
AMPLIFIER
-
1+1
OHM
4 OHM
+
2 OHM
TO
AMPLIFIER
-
8 OHM
8 OHM
8 OHM
8 OHM
Boom
Harder
-
!
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ADVANCED SPEAKER WIRING DIAGRAMS FOR VARIOUS LOADS
13
PARALLEL:
DUAL VOICE COIL
SPEAKERS
2 X DUAL VC 4 OHM SPEAKERS WITH
PARALLEL VOICE COILS, IN PARALLEL
3 X DUAL VC 8 OHM SPEAKERS WITH
PARALLEL VOICE COILS, IN PARALLEL
+
+
+
1 OHM
TO
AMPLIFIER
2.67 OHM
TO
AMPLIFIER
4+4
OHM
4+4
OHM
8+8
OHM
8+8
OHM
8+8
OHM
2 OHM
TO
AMPLIFIER
4+4
OHM
-
-
-
2 X DUAL VC 2 OHM SPEAKERS WITH
SERIES VOICE COILS, ALL IN PARALLEL
4 X DUAL VC 8 OHM SPEAKERS WITH
SERIES VOICE COILS, ALL IN PARALLEL
+
2 OHM
TO
AMPLIFIER
+
+
2 OHM
TO
AMPLIFIER
1 OHM
TO
AMPLIFIER
2+2
OHM
2+2
OHM
4+4
OHM
4+4
OHM
4+4
OHM
4+4
OHM
2+2
OHM
-
-
-
2 X DUAL VC 1 OHM SPEAKERS WITH
SERIES VOICE COILS, ALL IN PARALLEL
4 X DUAL VC 4 OHM SPEAKERS WITH
SERIES VOICE COILS, ALL IN PARALLEL
+
1 OHM
TO
AMPLIFIER
+
1 OHM
TO
AMPLIFIER
1+1
OHM
1+1
OHM
2+2
OHM
2+2
OHM
2+2
OHM
2+2
OHM
Boom
!
-
-
Harder
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14
TROUBLESHOOTING
HOW TO TROUBLE SHOOT A SYSTEM
AMPLIFIEROVERHEATINGANDSHUTTINGDOWN
The most common cause for this problem is when amplifiers are overloaded with speaker
impedances lower than what they are rated for. Double-check the impedance of your
speakers and their wiring. Also check that no speaker leads are shorted to the vehicle metal
chassis.
GENERAL
Acar stereo system consists of many different pieces of equipment connected together, and
a logical process of elimination will find the problem area, by isolating sections, and checking
them one at a time. Before following the instructions below, check and double check all wiring
andconnections.
AMPLIFIERGOINGINTOPROTECTION
When an amplifier goes into protection mode, we have to first establish whether the problem
lies with the amplifier, or whether it is something in the installation. Disconnect all RCA and
speaker cables, leaving the power, ground and remote connections. Turn the system on, and
if the amplifier now powers up properly, add the RCAcables, and see if the amplifier goes into
protection. If not, proceed by reconnecting the speaker leads, etc. By following this simple
processofelimination, thefaultcanbediagnosedquiteeasily.
TOOLSNEEDED
Thefollowingtoolswillhelpinfindingproblems:
A general purpose multi meter, capable of checking voltage and resistance, is perhaps the
mostusefulpieceoftestgearthatanyinstallercanown.
You may also need a test speaker, and a head unit, as these will be handy for temporary
connectionforcheckingpurposeswhenyouareworkinginthetrunkofthevehicle.
LACKOFBASS
NOSOUND
Thelackofbasscanbeattributedtovariouscauses.
Checkthattheproperrecommendedenclosureshavebeenusedforthewoofers.
Thisisprobablythemostperplexingproblemtofind.
1. Reduce the amp gain to 9 volts and unplug the RCA cables and speakers from the
amplifier.
Check the phasing of multiple woofers connected to one amplifier, as well as those
connected to multiple amplifiers. Refer to pages 10, 11 and 12. If the positive and negative
terminals are reversed in a two woofer system, you will get a cancellation which sounds like a
lackofbass.Alwaysdoublecheckyourwiringforproperphase.
2. Check with your multi meter that each amplifier in the system has proper 12 volt DC supply
onit’spowerterminals.
3. Alsocheckthattheremoteturnonterminalhas12voltonit.
Position of woofer enclosures in the vehicle will also affect bass output. You should
experiment with different box positions, firing forward, backward or upwards to see which way
yougetmorebassintothecabin.
Ifallseemswell, andtheamplifierpowerindicatorslightupwithoutanydiagnosticlight:
4. Connect the head unit RCA directly to the amplifier (eliminating any signal processors
whichyoumayhaveinstalledinbetweentheheadunitandamplifier)andturnonthesystem.
IfthepowerLEDisonwithnoDiagnosticLEDcontinue:
5. Connecteachspeakeroneatatimetoseewhichspeakerputstheampindiagnostic.
By utilizing this process of elimination you can determine where the cause of the
problem is. If the amplifier goes in to diagnostic with nothing connected to it, and you
are sure of proper power and ground, please contact our service department for
furtherhelpay7323705400.
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SPECIFICATIONS
ZRS-8
15
OUTPUT POWER
ZRS-8
ZRS-8
4 Ohm Competition Rating:
2 Ohm Power:
50 Watts
750 Watts
100 Watts
1000 Watts
2000 Watts
4000 Watts
23” x 14” x 3”
150 Watts
1500 Watts
2500 Watts
5000 Watts
25” x 14” x 3”
1 Ohm Power:
1500 Watts
3000 Watts
21” x 14” x 3”
2 Ohm power with 2 amps bridged:
Dimensions (LxWxH):
COMMON TO ALL MODELS
Input level adjustment range:
Low pass filter adjustment range:
Low pass filter slope:
200 mV to 9 Volt
50 Hz to 150 Hz
24 dB/octave
15 Hz to 50 Hz
24 dB/octave
0 to 180 degrees
0 dB to +15 dB
30 Hz to 80 Hz
> 100 dB
Subsonic filter adjustment range:
Subsonic filter slope:
Phase shift adjustment range:
Bass boost range:
Bass boost center frequency adjustment range:
Signal to noise ratio:
Damping factor:
>500 @ 100 Hz
<0.034%
Minimum THD&N:
Due to constant product improvements, these specifications
are subject to change without notice. High current rated
powers are at amplifier minimum distortion and are for
competition purposes. Not responsible for typographical
errors. Copyright by Cadence Sound Systems, Inc. 2003
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MONO CLASS D AMPLIFIERS
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