Cadence QRS Series, QRS Q3000, QRS Q4000, QRS Q5000, QRS Q2000 Owner's Manual

QRS Series Amplifiers // Owners Manual

INTRODUCTION

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Thank you for purchasing this Cadence QRS Series amplier. Over the years, the technology used to create audio
ampliers has grown by leaps and bounds. We have tens of thousands of satised customers still using our rst
generation Ultra Drive ampliers which are more than 19 years old. Our competition is satised with just continuing
to build the same units year after year without thought for improvement, but not Cadence. We consider it our
mission to use our expertise in developing the latest technologies and to bring you the absolute best sounding,
most powerful ampliers on the market and of course at a reasonable price. We are very proud to introduce this
second generation of QRS Series ampliers. You will be amazed at the quality and power that these new amps offer.
You will “Boom-Harder!” with QRS Series ampliers.

We have spared no expense in designing these ampliers, creating the most rugged, reliable, powerful and best
performing ampliers. In fact we are so sure of the quality we backup every QRS Series amplier with our exclusive
two-year warranty which exemplies 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 amplier. Should you need technical
assistance during or after your installation please call our technical-line between 9:30 am and 5:00 PM EST (M - Th) at
[phone]. Read this entire guide fully before attempting your installation.

WARNING: BE AWARE! Use of this amplier 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 ampliers at high volume levels while driving will impair your ability to hear
necessary trafc 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 amplier, secure it tightly. An unmounted amplier 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.

Introduction

FEATURES

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POWER AND PROTECTION CIRCUITRY:

QRS Series ampliers 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 amplier provide indication of the amplier
status, the Power LED will light when the amplier is receiving proper power, ground and remote voltages and the IC monitoring sequence indicates the amp is functional. In
case the amplier encounters a diagnostic condition as listed below, the second LED will light indicating a Diagnostic condition. When a diagnostic condition is sensed the
amplier 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 amplier off immediately.

1. Speaker short circuit.

2. Input Overload.

3. Thermal overload.

4. Reverse Polarity.

To reset the amplier, you must rst diagnose what caused the problem, correct the fault and restart the system.

MUTE CIRCUIT:

The QRS Series ampliers feature an anti-thump, mute and delay circuit. This eliminates irritating speaker damaging turn-on and turn-off transients normally experienced with
less expensive ampliers.

BASS EQUALIZATION CIRCUITRY:

A narrow “Q” shelving equalization circuit is included in the ampliers. The equalization system is preset at 45Hz. The boost control allows you to add up to +12dB of Bass EQ
effect. Utilize the Bass EQ to tailor your bass response to your systems needs. Please keep in mind that by adding Bass EQ you are adding stress on your speakers. Make sure
your speakers can handle the extra power output! It would be foolish to add 18dB of gain to low excursion 8” and 10” Sub woofers or mid ranges and tweeters. It’s a sure way
to blow your speakers. The Bass EQ was designed for High Power sub woofers.

“ADR”: - ACTIVE DYNAMIC REGULATION

Cadence QRS Series ampliers 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 amplier 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. The ADR
is supplied with power via a high speed, high temperature capacitance bank and 100% pure copper rails on the PCB enabling fast transient response to musical demands.

Features

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SUPER CLASS AB AUDIO STAGE PERFORMANCE

The audio output section of the QRS Series ampliers feature Japanese studio grade, high current Bipolar audio transistors. Unlike other manufacturers who use a host of
different type of transistors, not originally designed for audio output, i.e.: power supply transistors, motor control transistors to produce the audio signal (you can only imagine
what they sound like.) Cadence uses only true audio transistors in the audio section of these ampliers. These transistors were designed and engineered to produce music.
That’s why Cadence ampliers clearly sound better. They are cleaner with lower distortion, higher current capable and more reliable. We challenge you to test listen a Cadence
amplier and hear the difference yourself.

PROTECTION CIRCUITRY:

Cadence ampliers incorporate many outstanding protection circuits to help protect the amplier from being damaged during operating conditions.

Thermal Protection: When the amplier reaches an unsafe operating temperature of 80 degrees Celsius the amplier will turn off. Once the amplier cools down, simply reset
the amplier by its Remote connection, (turn the amplier off and then on again once you have given the amplier a chance to cool down) and the amp will once again begin
to play.

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 awlessly and without any musical interruption.

Speaker Short Circuit Protection: Should your speakers short circuit due to voice coil burn out, or should the amplier 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 amplier. You must reset the amplier 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 nd that your speakers and speaker wires are not shorted, please check
your ground connection.

Input Overload Protection: This circuit will either shutdown the amplier completely or make the amplier spurt on and off indicating that it is in a diagnostic condition. Turn the
system off and reduce the gain on the amplier or volume from your head unit, this should result in a corrected condition.

DC Offset Protection: Should any DC voltage try to enter the amplier via the speaker terminals it will cause the amplier 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 amplier ever malfunction.

Features

5

REMOTE TURN ON CONNECTION:

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 amplier 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.

INSTALLATION BASICS:

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
amplier. Cadence ampliers operate on 12-volt negative ground systems only.

It is recommend that you layout your sound system design on paper rst. This will help you during the installation so that you will have a wiring ow chart and not miss-wire any
of your components.

Mount the amplier in the trunk or hatch area of your vehicle. Never install an amplier in the engine compartment or on the re wall. Please be sure to leave breathing room
around the amplier heat sink so that it can dissipate the heat it produces efciently. When mounting the amplier on the trunk oor, 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.

SETTING THE CONTROLS:

AUDIO PREAMP INPUT

The QRS Series ampliers feature RCA pre amp inputs. Run RCA cables from your sound source to the inputs of the amplier. We suggest the use of high quality shielded
RCA patch cords to help reduce and eliminate unwanted electrical noise to your system. 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 amplier.

SUBSONIC FILTERING

For sub woofer installations with a passive LP crossover using models Q5000, Q4000, Q3000, and Q2000, you can set the amplier’s CROSSOVER MODE selector to HIGH
PASS while setting the FREQUENCY KNOB to 30Hz, this will act as SUBSONIC FILTER for all signals below 30Hz. 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. Models Q6000m, Q7000m, Q8000m, and Q9000m come with a
built in subsonic lter that ranges from 10Hz to 50Hz.

Installation Basics

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ADJUSTING THE SYSTEM

Once the system is operational, the rst thing to do, is set all crossover points to approximate settings. In the case of the basic sub woofer system Low Pass lter crossover at
100 Hz or so. Set the Bass Equalizer controls to 0 dB ( Flat Switch Position.) Now you should set the ampliers input sensitivity adjustment. The knob accessible on the side of
the amplier marked GAIN adjusts the input sensitivity from 6 Volts to 0.2 Volts. To adjust the input sensitivity, turn the control using a small at 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 amplier 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 amplier’s gain separately. Start off with the bass amplier, then adjust the highs amplier’s level control to match. Once you
are satised 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 ampliers level controls. The level control of any car amplier 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 amplier. Do not adjust the amplier gain 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. The gain adjustments need to be made only once when rst
setting up the system.

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 CROSSOVER - 4 CHANNEL / 5 CHANNEL MODELS

The 4 / 5 channel models feature separate crossovers for channels 1-2, 3-4, and 5 (5 channel model). All the QRS Series ampliers feature 12dB per octave fully adjustable
low-pass and high pass electronic crossovers.

FOUR CHANNEL AMPLIFIER CONFIGURATIONS.

1. All four channels High Pass for internal component speakers in doors and rear decks.

2. Channels 1 and 2 High Pass for front component speakers, while channels 3 and 4 are wired to sub woofers.

3. Bridge channels 1 and 2 for single high power sub woofer channel. Bridge channels 3 and 4 for second high power sub woofer channel.

For Low Pass systems, set the CROSSOVER MODE switches to LOW PASS. Now the knob marked LOW PASS will control the low pass frequencies from 50Hz to 250Hz
(Q9000m, Q8000m, Q7000m, and Q6000m); 50Hz to 500Hz (Q4000, Q3000, Q2000); or, for the Q5000, 150Hz to 4KHz (Ch 3-4) and 50Hz to 250Hz (Ch 5). 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 100Hz (the 12 o’clock position).

When using the ampliers for component speakers or coaxial, you will want to set the CROSSOVER MODE switches to HIGH PASS. The HIGH PASS control knobs adjust
the high pass frequencies between 50Hz - 500Hz (Ch1-2) and 50Hz - 150Hz (Ch 3-4). Do not attach tweeters directly to the amplier even in the high pass mode without a
secondary passive crossover to protect them. 500Hz high pass is not a frequency high enough for tweeters.

Installation Basics

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MOUNTING THE AMPLIFIERS:

Choose a convenient mounting location with unobstructed airow.

The QRS series ampliers feature four mounting tabs located at the ampliers four corners.

Using the supplied screws and grommets, gently mount the amplier in to position.

Do not over tighten the screws.

Mounting and Wiring

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The QRS Series ampliers are supplied with built-in fuses, never replace the fuse that the amp came with, with one of a larger value.

We suggest you construct a Red wiring harness with 2 additional fuses. 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 amplier. A second fuse closer to the amplier offers additional safety to the amplier itself. This fused red power
wire should be attached to the amplier power terminal marked 12V+.

The wire harness should be made of red primary cable of at least 4 gauge for all QRS Series ampliers. 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 amplier 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 ampliers, mount them in close proximity so that they can all share the same ground point. Attach
the black ground wire to the amplier screw terminal marked Ground.

We recommend that you use the Cadence AMPKIT4 or AMPKIT8 amplier installation kits, which contains all the cabling and accessories necessary for a good, reliable installation.

Over the years we have received ampliers 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 amplier 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 amplier 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.

BATTERY

FUSE

GROUND

REMOTE TURN ON

Mounting and Wiring

FEATURES

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The Q3000 features a unique CLONE FUNCTION to assist in setting up a 2-channel bridged system with perfect gain and crossover tracking between the speakers. Typically
when setting up a system you would need to set up channels 1 - 2 and then channels 3 - 4 crossovers and gains separately not guaranteeing perfect balance or frequency
cutoffs. By using the CLONE FUNCTION you can control channels 1 - 2 from the processed signals of channels 3 - 4 thereby guaranteeing that all 4 channels are getting
identical voltages and have their crossover settings identical at identical frequencies. Here is how you do it:

4 Channel Amp Clone Features (Q3000, Q4000)

2. SET THE CROSSOVER

MODE SWITCH TO CLONE
CH3 AND CH4. THIS WILL
SEND THE PROCESSED
SIGNAL OF CH3 AND CH4
TO CH1 AND CH2.

1. PLUG STEREO RCA’S

INTO CH3 AND CH4.

3. NOW ALL CONTROLS

FOR CH1 AND CH2 WILL
BE NON FUNCTIONAL. ALL
CROSSOVER SETTINGS WILL
BE CONTROLLED FROM CH3
AND CH4.

4 Channel Amp with 2 C hannel Input (Q3000, Q4000)

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If your head unit has only one pair of Left and Right
RCA out put jacks, plug them in to RCA input Jacks
1 and 2 of the amplier. The amplier preamp
circuit will automatically mix the signals to
channels 3 and 4 thereby preserving your Left
and Right Balance control but with no Fade
control Front to Rear.

TO AUDIO OUTPUTS OF HEAD UNIT OR

SIGNAL PROCESSOR WITH STEREO

OUTPUTS

L

R

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TO AUDIO OUTPUTS OF HEAD UNIT OR

SIGNAL PROCESSOR WITH STEREO

OUTPUTS

If your head unit has two pairs of RCA output jacks, input Front Left and Front Right to channels 1 and 2. Then attach the rear pre-outs to channels 3 and 4. The pre-amp circuitry
will not mix any signals thereby preserving full left to right balance and font to rear fader control.

Should your head unit have an additional subwoofer RCA output it would need to be attached to a separate subwoofer amplier.

When conguring a four channel amplier to a three channel system, you can use an RCA “Y” adaptor to send the subwoofer pre amp signal to channels 3 and 4 and bridge
those channels to the subwoofer. Use “Y” adaptors to mix channels 1 and 3 and input them into RCA channel 1, then mix channels 2 and 4 and input them into RCA channel 2.
The result will be preserved Left and Right balance with constant subwoofer output.

4 Channel Amp with 4 C hannel Input (Q3000, Q4000)

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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 Switch to Full Range.

Basic 4 Channel Conguration (Q3000, Q4000)

LEFT SPEAKER

2-4 OHM

RIGHT SPEAKER
2-4 OHM

LEFT SPEAKER

2-4 OHM

RIGHT SPEAKER
2-4 OHM

FRONT SPEAKERS

REAR SPEAKERS

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When bridging the four channel amplier, make sure that your nal woofer impedance on each bridged
channel is no lower than 4 ohms. Set the Crossover Mode Switch to Low Pass and begin by setting the
crossover frequency control to 100Hz and tuning from there.

4 Channel Amplier Bridged to 2 Channels (Q3000, Q4000)

RIGHT SUBWOOFER
MINIMUM IMPEDANCE
4 OHMS

LEFT SUBWOOFER
MINIMUM IMPEDANCE
4 OHMS

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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 positive side (+) and Channel 4 negative side ( – ) terminals.

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. Please see page 11 for RCA input conguration details and instructions when wiring a 3 channel system.

4 Channel Amplier in 3 Channel Mode (Q3000, Q4000)

LEFT SPEAKER

2-4 OHM

RIGHT SPEAKER
2-4 OHM

SUBWOOFER

MINIMUM IMPEDANCE

4 OHMS

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4 Channel with Mixed Mono (Q3000, Q4000)

CH 1-2 CROSSOVER MODE SWITCH
IN HIGH PASS POSITION
CH 3-4 CROSSOVER MODE SWITCH
IN LOW PASS POSITION

COMPONENT VALUES FOR

6dB PASSIVE CROSSOVER

FREQUENCY INDUCTOR CAPACITOR

80 Hz
100 Hz
120 Hz
150 Hz

7.5 mH

6.5 mH

5.5 mH
4 mH

470 uF
330 uF
330 uF
220 uF

SUBWOOFER
MINIMUM IMPEDANCE
4 OHMS

SUBWOOFER
MINIMUM IMPEDANCE
8 OHMS

FRONT

SPEAKERS

LOW PASS

FILTER INDUCTOR

LEFT SPEAKER

4 OHM

RIGHT SPEAKER
4 OHM

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4 Channel with Dual Mixed Mono Conguration (Q3000, Q4000)

ALL CROSSOVER
SETTINGS IN THIS
MODE SHOULD BE
SET TO FULL RANGE.

SUBWOOFER
MINIMUM IMPEDANCE
8 OHMS

SUBWOOFER
MINIMUM IMPEDANCE
4-8 OHMS

FRONT SPEAKERS

REAR SPEAKERS

HIGH PASS

FILTER

CAPACITORS

LOW PASS
FILTER INDUCTOR

LOW PASS
FILTER INDUCTOR

LEFT SPEAKER

4 OHM

LEFT SPEAKER

4 OHM

RIGHT SPEAKER
4 OHM

RIGHT SPEAKER
4 OHM

COMPONENT VALUES FOR

6dB PASSIVE CROSSOVER

FREQUENCY INDUCTOR CAPACITOR

80 Hz
100 Hz
120 Hz
150 Hz

7.5 mH

6.5 mH

5.5 mH
4 mH

470 uF
330 uF
330 uF
220 uF

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If your head unit has one single pair of RCA
outputs, input them in to the amplier’s Channel
1 and 2 input jacks and set the Input Mode
Switch to 2Ch. The amplier’s 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.

If your head unit has two pairs of RCA outputs,
input Front Left and Front Right in to amplier’s
Channel 1 and 2 input jacks. Rear Left and Rear
Right in to the amplier’s Channel 3 and 4 input
jacks. Set the Input Mode Switch to 4Ch. The
amplier’s 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 fade with constant subwoofer.

If your head unit has three pairs of RCA outputs,
input Front Left and Front Right in to amplier’s
Channel 1 and 2 input jacks. Rear Left and
Rear Right in to amplier’s Channel 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
amplier’s 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 fade with independent subwoofer.

5 Channel Input Mode (Q5000)

2 CHANNEL MODE

4 CHANNEL MODE

5 CHANNEL MODE

INPUT MODE SET TO

2 CHANNEL

INPUT MODE SET TO

4 CHANNEL

INPUT MODE SET TO

5 CHANNEL

18

Minimum impedance for channels 1 through 4 is 2 ohm stereo.
Channel ve minimum impedance is 2 ohm mono capable.

INPUT MODE SET TO

5 CHANNEL

SUBWOOFER
MINIMUM IMPEDANCE
2-4 OHMS

COMPONENT

SPEAKERS

MINIMUM IMPEDANCE

2-4 OHMS

COMPONENT

SPEAKERS

MINIMUM IMPEDANCE

2-4 OHMS

5 Channel Amplier Speaker Wiring (Q5000)

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2 Channel Amplier 2 Ohm / 4 Ohm Stereo (Q2000)

LEFT SPEAKER

4 OHM OR 2 OHM

RIGHT SPEAKER
4 OHM OR 2 OHM

CROSSOVER MODE SWITCH

IN FULL RANGE

20

2 Channel Amplier 4 Ohm Bridged (Q2000)

CROSSOVER MODE SWITCH

IN LOW PASS

SUBWOOFER MINIMUM
IMPEDANCE 4 OHMS

21

Monoblock 2 Ohm Ampliers (Q6000m, Q7000m, Q8000m)

DVC 4 OHM SUBWOOFER
IN PARELLEL = 2 OHM LOAD

4 OHM SUBWOOFER 4 OHM SUBWOOFER

2 OHM MINIMUM LOAD

- OR -

The following models: Q6000m, Q7000m, and Q8000m are 2
ohm mono block ampliers. No matter how many woofers you
choose to wire up to these models, the nal impedance should
not fall below 2 ohms. Please see page 26 and 27 for various
speaker impedance congurations.

Monoblock 1 Ohm Amplier (Q9000m)

DVC 2 OHM SUBWOOFER
IN PARELLEL = 1 OHM LOAD

2 OHM SUBWOOFER 2 OHM SUBWOOFER

1 OHM MINIMUM LOAD

- OR -

The Q9000m is a 1 ohm mono block Class D amplier. No matter
how many woofers you choose to wire up to this amplier the nal
impedance load should not fall below 1 ohm. Please see pages 26
and 27 for various speaker impedance congurations.

22

RIGHT CHANNELS

23

High Level Inputs / Smart Turn On (All Models)

High Level Input

Many factory radios do not have preamp outputs thus all QRS Series models feature High Level inputs. High Level inputs, also referred to as speaker level inputs, allow you to
connect to the factory speaker wires. They are called High Level inputs because they convert the high voltage running through factory speaker wires to one the amplier can
handle. These inputs will provide the end user with clean, well dened sound for optimal musical enjoyment.

Smart Turn On

The Smart Turn On feature allows the amplier to automatically start when ever it sense current or sound signal. Use the Music Sense and DC sense settings when using the
High Level input. The DC setting will power up the amplier when high current signal is sensed. It is intended for high powered after market / stock head units. The MusicSense
setting will power up the amp when a low current signal is sensed. This setting is intended for use with low powered after market / stock head units*. Use the Radio Remote
Line In setting when using the RCA inputs.

HIGH LEVEL INPUTS

(VERTICAL ORIENTATION)

HIGH LEVEL INPUTS

(HORIZONTAL ORIENTATION)

LEFT CHANNELS

RIGHT CHANNELS

GROUND

LEFT CHANNELS

*Always use DC sensing rst. If you notice a longer turn on delay or hear any audible popping noises, switch to Music Sense.

GROUND

• High-Speed MOSFET Power Supply

• Studio-Grade Bipolar Output Stage Transistors

• Fully Adjustable 12dB / Octave Crossover

• Fully Adjustable +12dB Bass Equalizer

• 2 Ohm Stable Stereo

• 4 Ohm Mono Bridgeable

• High Level Inputs

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuit

• LP / FR / HP Crossover Mode Switch

• 9 Volt Pre-Amp Circuit

• High-Speed MOSFET Power Supply

• Studio-Grade Bipolar Output Stage Transistors

• Fully Adjustable 12dB / Octave Crossover

Low Pass 50Hz - 500Hz

High Pass 50Hz - 150Hz

• Fully Adjustable +12dB Bass Equalizer

• 2 Ohm Stable Stereo

• 4 Ohm Mono Bridgeable

• 4 Channel Mixed-Mono Capable

• High Level Inputs

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuit

• 2 CH / 4 CH Input Mode Switch

• Clone Function

• 9 Volt Pre-Amp Circuit

• High-Speed MOSFET Power Supply

• Studio-Grade Bipolar Output Stage Transistors

• Fully Adjustable 12dB / Octave Crossover

Low Pass 50Hz - 500Hz

High Pass 50Hz - 150Hz

• Fully Adjustable +12dB Bass Equalizer

• 2 Ohm Stable Stereo

• 4 Ohm Mono Bridgeable

• 4 Channel Mixed-Mono Capable

• High Level Inputs

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuit

• 2 CH / 4 CH Input Mode Switch

• Clone Function

• 9 Volt Pre-Amp Circuit

Q4000

• Rated Power: 125 Watts RMS @ 4 ohm x 4

• Rated Power: 190 Watts RMS @ 2 ohm x 4

• 2 x 380 Watts RMS @ 4 ohm Mono Bridged

• Minimum THD at Rated Power: < 0.1%

• Frequency Response: 10Hz - 40KHz

• S / N Ratio: > 97dB

• Damping Factor: > 150 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 16.9”

24

Q5000

• Rated Power: 80 Watts RMS @ 4 ohm x 4 + 250 Watts x 1

• Rated Power: 120 Watts RMS @ 2 ohm x 2 + 250 Watts x 1

• 1 x 400 Watts RMS @ 2 ohm mono

• Minimum THD at Rated Power: < 0.05%

• Frequency Response: 10Hz - 40KHz

• S / N Ratio: > 97dB

• Damping Factor: > 114 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 18”

• High-Speed MOSFET Power Supply

• Studio-Grade Bipolar Output Stage Transistors

• Fully Adjustable 12dB / Octave Crossover

Low Pass 50Hz - 4KHz

High Pass 150Hz - 4KHz

• Fully Adjustable Bass Equalization Control

• 2 Ohm Stable Stereo

• 4 Ohm Mono Bridgeable

• 3 Channel Mixed-Mono Capable

• Channel 5 - 2 Ohm Mono Capable

• High Level Inputs

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuitry

• 2 CH / 4 CH / 5 CH Input Mode Selector

• 9 Volt Pre-Amp Circuit

Q3000

• Rated Power: 90 Watts RMS @ 4 ohm x 4

• Rated Power: 135 Watts RMS @ 2 ohm x 4

• 2 x 270 Watts RMS @ 4 ohm Mono Bridged

• Minimum THD at Rated Power: < 0.1%

• Frequency Response: 10Hz - 40KHz

• S / N Ratio: > 97dB

• Damping Factor: > 198 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 14.9”

Q2000

• Rated Power: 90 Watts RMS @ 4 ohm x 2

• Rated Power: 135 Watts RMS @ 2 ohm x 2

• 1 x 270 Watts RMS @ 4 ohm Mono Bridged

• Minimum THD at Rated Power: < 0.1%

• Frequency Response: 10Hz - 40KHz

• S / N Ratio: > 97dB

• Damping Factor: > 114 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 12.1”

Specications

25

Q6000m

• Rated Power: 400 Watts RMS @ 2 ohm

• Rated Power: 300 Watts RMS @ 4 ohm

• Bridged Power: N/A

• Minimum THD at Rated Power: < 0.1%

• Frequency Response: 10Hz - 250Hz

• S / N Ratio: > 97dB

• Damping Factor: > 100 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 10.9”

Q7000m

• Rated Power: 600 Watts RMS @ 2 ohm

• Rated Power: 400 Watts RMS @ 4 ohm

• Bridged Power: N/A

• Minimum THD at Rated Power: < 0.1%

• Frequency Response: 10Hz - 250Hz

• S / N Ratio: > 97dB

• Damping Factor: > 160 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 13.7”

Q8000m

• Rated Power: 800 Watts RMS @ 2 ohm

• Bridged Power: 500 Watts RMS @ 4 ohm

• Bridged Power: N/A

• Minimum THD at Rated Power: < 0.1%

• Frequency Response: 10Hz - 250Hz

• S / N Ratio: > 97dB

• Damping Factor: > 200 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 19.2”

Q9000m

• Rated Power: 1200 Watts RMS @ 1 ohm

• Rated Power: 600 Watts RMS @ 2 ohm

• Rated Power: 300 Watts RMS @ 4 ohm

• Bridged Power: N/A

• Minimum THD at Rated Power: < 0.1%

• Frequency Response: 10Hz - 250Hz

• S / N Ratio: > 97dB

• Damping Factor: > 200 @ 100Hz

• Dimensions: ( W x H x L ) 7.9” x 2.4” x 13.7”

• High-Speed MOSFET Power Supply

• Studio-Grade Bipolar Output Stage Transistors

• Subsonic Filter 10Hz - 50Hz

• Fully Adjustable Bass EQ Boost Control

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuitry

• Dashboard Bass Remote Control Included

• RCA Preamp Line Output

• High Level Inputs

• Phase Control Switch

• 9 Volt Pre-Amp Circuit

• High-Speed MOSFET Power Supply

• Studio-Grade Bipolar Output Stage Transistors

• Subsonic Filter 10Hz - 50Hz

• Fully Adjustable Bass EQ Boost Control

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuitry

• Dashboard Bass Remote Control Included

• RCA Preamp Line Output

• High Level Inputs

• Phase Control Switch

• 9 Volt Pre-Amp Circuit

• High-Speed MOSFET Power Supply

• Studio-Grade Bipolar Output Stage Transistors

• Subsonic Filter 10Hz - 50Hz

• Fully Adjustable Bass EQ Boost Control

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuitry

• Dashboard Bass Remote Control Included

• RCA Preamp Line Output

• High Level Inputs

• Phase Control Switch

• 9 Volt Pre-Amp Circuit

• High-Speed MOSFET Power Supply

• Class D Output Stage

• Subsonic Filter 10Hz - 50Hz

• Fully Adjustable Bass EQ Boost Control

• Smart Turn On Circuit

• Full IC-Controlled Protection Circuitry

• Dashboard Bass Remote Control Included

• RCA Preamp Line Output

• High Level Inputs

• Phase Control Switch

• 9 Volt Pre-Amp Circuit

Specications

26

2 OHM

TO

AMPLIFIER

4 + 4
OHM

4 + 4
OHM

4 + 4
OHM

4 + 4
OHM

4 X DUAL VC 8 OHM

SPEAKERS WITH

SERIES VOICE COILS,

ALL IN PARALLEL

SERIES:

SINGLE VOICE

COIL SPEAKERS

PARALLEL:

SINGLE VOICE

COIL SPEAKERS

2 OHM

TO AMPLIFIER

4

OHM

4

OHM

4 OHM

TO AMPLIFIER

2

OHM

2

OHM

Speaker Wiring Chart

27

2 X DUAL VC 2 OHM SPEAKERS

WITH SERIES VOICE COILS,

ALL IN PARALLEL

SERIES:

DUAL VOICE COIL

SPEAKERS

PARALLEL:

DUAL VOICE COIL

SPEAKERS

8 OHM

TO AMPLIFIER

4 + 4
OHM

4 OHM

TO AMPLIFIER

2 + 2
OHM

2 OHM

TO AMPLIFIER

1 + 1
OHM

2 OHM

TO AMPLIFIER

2 OHM

TO AMPLIFIER

4 + 4
OHM

2 + 2
OHM

2 + 2
OHM

Please note that the minimum impedance load
for single Cadence QRS Series Ampliers is 2
ohm stereo and 4 ohm mono bridged.

Lower impedance loads will cause overheating
and may damage the ampliers.

Do not mix different impedance speakers in
series and / or parallel combinations, as unequal
power sharing and acoustic outputs will result.

Speaker Wiring Chart

// F eature s and spec ifica tions subj ect t o cha nge a nd or improvement without notice.

Thou gh we trie d our best to e nsure that this manua l is free and clear of errors p lease don’t hold us r espon sible for print ing e rrors. //

Copy right by C adenc e Aco ustic s LTD.

www.ca dence sound .com