QUANTUM QS-TWO-ISO Class D 2-Channel Nano Amplifier Owner’s Manual

QUANTUM QS-TWO-ISO Class D 2-Channel Nano Amplifier Owner's Manual

SAFETY INSTRUCTIONS

PLEASE NOTE THE FOLLOWING ADVICE BEFORE THE FIRST OPERATION!

THE PURCHASED DEVICE IS ONLY SUITABLE FOR AN OPERATION WITH A 12V ON-BOARD ELECTRICAL SYSTEM OF A VEHICLE. Otherwise fire hazard, risk of injury and electric shock consists.

PLEASE DO NOT MAKE ANY OPERATION OF THE SOUND SYSTEM, WHICH DISTRACT YOU FROM A SAFE DRIVING. Do not make any procedures, which demand a longer attention. Perform these operations not until you have stopped the vehicle on a safe place. Otherwise the risk of accident consists.

ADJUST THE SOUND VOLUME TO AN APPROPRIATE LEVEL, THAT YOU ARE STILL ABLE TO HEAR EXTERIOR NOISES WHILE DRIVING. High performance sound systems in vehicles may generate the acoustic pressure of a live concert. The permanent listening to extreme loud music may cause the loss of your hearing abilities. The hearing of extreme loud music while driving may derogate your cognition of warning signals in the traffic. In the interests of the common safeness, we suggest to drive with a lower sound volume. Otherwise the risk of accident consists.

MOUNT THE DEVICE AND OTHER COMPONENTS OF THE SOUND SYSTEM SUFFICIENTLY. Otherwise the device and components may get loose and act as dangerous objects, which could cause serious harm and damages in the passenger room.

ENSURE NOT TO DAMAGE COMPONENTS, WIRES AND CABLES OF THE VEHICLE WHEN YOU DRILL THE MOUNTING HOLES. If you drill the mounting holes for the installation into the vehicle’s chassis, ensure by any means, not to damage, block or tangent the fuel pipe, the gas tank, other wires or electrical cables.

ENSURE CORRECT CONNECTION OF ALL TERMINALS. Faulty connections may could cause fire hazard and lead to damages of the device.

ENSURE THAT CABLES MAY NOT CAUGHT UP IN CLOSE-BY OBJECTS. Install all the wires and cables like described on the following pages, therewith these may not hinder the driver. Cables and wires which are installed close-by the steering wheel, gear lever or the brake pedal, may caught up and cause highly dangerous situations.

DO NOT OPEN THE DEVICE. Otherwise fire hazard, risk of injury and electric shock consists. Also this may cause a loss of the warranty.

REPLACE FUSES ONLY WITH FUSE WITH THE SAME RATING. Otherwise fire hazard and risk of electric shock consists.
DO NOT USE THE DEVICE ANY LONGER, IF A MALFUNCTION, WHICH REMAINS UNREMEDIED. Refer in this case to the chapter TROUBLE SHOOTING. Otherwise risk of injury and the damage of the device consists. Commit the device to an authorized retailer.

DISCONNECT THE GROUND CONNECTION FROM THE VEHICLE’S BATTERY BEFORE INSTALLATION. Before you start with the installation of the sound system, disconnect by any means the ground supply wire from the battery, to avoid any risk of electric shock and short circuits.

DO NOT INSTALL THE DEVICE AT LOCATIONS, WHERE IT WILL BE EXPOSED TO HIGH HUMIDITY AND DUST. Install the device at a location, where it will be protected from high humidity and dust. If humidity and dust attain inside the device, malfunctions may be caused.

DO NOT SPLICE ELECTRICAL WIRES. The electrical wires should not be bared, to provide power supply to other devices. Otherwise the load capacity of the wire may get overloaded. Use therefor a appropriate distribution block. Otherwise fire hazard and risk of electric shock consists.

DO NOT USE BOLTS AND SCREW NUTS OF THE BRAKE SYSTEM AS GROUND POINT. Never use for the installation or the ground point bolts and screw-nuts of the brake system, steering system or other security-relevant components. Otherwise fire hazard consists or the driving safety will be derogated.

ENSURE NOT TO BEND OR SQUEEZE CABLES AND WIRES BY SHARP OBJECTS. Do not install cables and wires not close-by movable objects like the seat rail or may be bent or harmed by sharp and barbed edges. If you lead a wire or cable through the hole in a metal sheet, protect the insulation with a rubber grommet.

KEEP AWAY SMALL PARTS AND JACKS FROM CHILDREN. If objects like these will be swallowed, the risk of serious injuries consists. Consult promptly a medical doctor, if a child swallowed a small object.

SPECIFICATIONS

INSTALLATION AND FUNCTIONAL INSTRUCTIONS

First locate the ISO cable between the vehicle and the hea unit/car radio, which is located in the radio slot on the dashboard. Then pull out both plug connections to be able to connect the QM-TWO-ISO amplifier between them. If your vehicle’s head unit/car radio does not have an ISO connection, appropriate adapter cables such as the MPK sets for all common vehicle types are available from specialist dealers

Due to the small dimensions of the amplifier, you can store it in the radio slot of the dashboard, but make sure that the amplifier gets enough cooling.

After connecting and installing the amplifier, the front channels (CH1/FL and CH2/FR) from the control unit/car radio are amplified. The rear channels (CH3/RL and CH4/RR) continue to play unmodified. For example, it is advisable to operate an active subwoofer system with the signal output (OUTPUT) of the amplifier.

1. Connect the enclosed cable plug to the INPUT / OUTPUT and SPEAKER OUTPUT sockets on the amplifier. Then plug connector A into the free slot on the head unit / car radio and plug socket B onto the corresponding connector on the ISO cable coming from the vehicle.

2. Connect the enclosed cable plug to the POWER INPUT socket on the amplifier. Then plug connector C into the free slot on the head unit / car radio and plug socket D onto the corresponding connector on the ISO cable coming from the vehicle.
   The amplifier does not have an internal device fuse. The fuse is secured via the cable fuse of the head unit/car radio. If this is defective, only replace the fuse with an equivalent one.

3. Bring this switch to position “DC”, then the amplifier then detects a voltage rise to 6 volts when the head unit is turned on by a so-called “DC offset” and then turns on the amplifier.
   Note: As soon as the head unit is switched off again, the amplifier switches itself off.

4. The X-OVER switch selects the desired operating mode:
   LP: Lowpass mode: this switch position should not be selected in this operating mode.
   HP: High pass mode: fixed at 80 Hz, frequency is limited downwards. Use this switch position if you want to operate small to medium-sized loudspeakers.
   FULL: Full range mode: the entire frequency range is amplified. Use this switch position if you want to operate medium to large speakers.

5.  The LEVEL INPUT controller determines the input sensitivity of the amplifier to adapt to the output signal of the head unit.
   • Turn the LEVEL INPUT controller of the amplifier to the MIN position.
   • Turn the volume controller of the head unit to 80 – 90% of its full setting.
   • Turn the LEVEL INPUT controller clockwise until you hear some distortion.
   • Then turn back the LEVEL INPUT controller slightly until you hear a cleaner sound.

6. If the POWER/PROTECT is blue, the amplifier is ready for operation. If the POWER/PROTECT is red, there is a malfunction. Refer in this case to the section TROUBLE SHOOTING.

7. The OUTPUT RCA jacks of the wire harnesses provide a linear full range audio signal for driving additional amplifiers or active subwoofer systems.

TROUBLE SHOOTING

NOTE
All instructions in this troubleshooting refer to the entire sound system and its individual components. The features of your device may not match the functions described in the notes. Then skip this point and move on to the next one.

NO FUNCTION / THE POWER LED IS NOT ILLUMINATED
First check the fuse of the routed power cable on the vehicle battery
The fuse is defective Replace the defective fuse with an equivalent one, never with a higher value.

• The fuse fails again. In this case there appears to be a short circuit between the fuse and the amplifier. To do this, check the + 12V power cable along its entire length from the battery to the amplifier for damage and whether there is a short circuit to ground, e.g. a contact with the vehicle chassis or the body. If necessary, replace the defective power cable.

The fuse is apparently okay
Use a standard 12 volt voltmeter to check the voltage between the + 12V connection and the ground connection on the amplifier.

• There is no voltage. Use the voltmeter to check the fuse, which is located close to the vehicle battery, to see whether there is voltage between the output and ground. If there is no voltage there, either the fuse holder or the fuse is defective, although it appears to be okay. If necessary, replace the fuse holder or fuse.
• There is voltage. If you operate the amplifier with a pre-amplifier signal (RCA), you must have laid a remote turn-on wire from the head unit to the REM terminal of the amplifier. The AUTO TURN-ON switch must be in the OFF position. However, you can test the AUTO TURN-ON switch to SIG. to see if the amplifier then turns on. If so, there is a problem with the control line..
  • A remote turn-on wire is connected to the REM terminal at the amplifier. Use the voltmeter to check whether there is voltage between the REM terminal of the amplifier and ground. The head unit must be switched on. There is no voltage.
  • Check the remote turn-on wire from the amplifier to the head unit for a short circuit or damage. If necessary, replace the control line.. There is voltage.
  • The amplifier is probably malfunctioning or defective. Contact your retailer. If you operate the amplifier with the loudspeaker signals (high level mode), the AUTO TURN-ON switch must be switched to DC.
• The AUTO TURN-ON switch is in the DC position, but the amplifier remains off. Check the speaker cables from the head unit to the amplifier for short circuits or damage. If necessary, replace the speaker cables or insulate the damaged area.

THE POWER LED IS ON, BUT NO SOUND COMES FROM THE SPEAKERS
Check the following steps: Low level mode: Are the RCA cables on the head unit and on the amplifier correctly connected?

• The RCA cables are correctly connected. Then an RCA cables could be defective. Check the function of the RCA cables on another audio device. If necessary, replace the defective RCA cables.
  High level mode: Are the loudspeaker cables on the head unit and the high level inputs of the amplifier or on the high level cable plug correctly connected?

• The speaker cables are connected correctly. A speaker cable could be defective. If necessary, replace the speaker cable or insulate the damaged area.
  Are the speaker cables correctly connected between the speakers or the subwoofer at the speaker outputs of the amplifier?

• The speaker cables are connected correctly. A speaker cable could be defective. If necessary, replace the speaker cable or insulate the damaged area.
  Is the high pass filter or subsonic filter set higher than the low pass filter on the amplifier? Then slowly turn down the controller for the high pass filter or subsonic filter until the sound can be heard.
  Is the input mode switch on the amplifier set correctly? Check the setting and change the switch position if necessary.
  Are the crossover switches on the amplifier set correctly? Check the settings and change the respective switch position if necessary.
  Are the speakers or the subwoofer working? Hold a standard 9 volt block battery to the terminals of each loudspeaker or the subwoofer

• A faint cracking sound can be heard. The speaker or subwoofer is fine

• There is nothing to be heard. The loudspeaker or subwoofer could be defective. If necessary, replace the defective speaker or subwoofer.
  Are the settings on the head unit set correctly?

• Check the fader and balance settings

• Check whether the mute function is activated

• Check whether a high pass or low pass filter is activated

• Check whether playback has been paused

• Check the source settings

• Check whether any existing subwoofer output is activated

DISTORTION OR HISSING NOISE CAN BE HEARD FROM THE SPEAKERS
Check the following steps:

Is a input level controller on the amplifier set too high?
Slowly turn the controller back until you hear a clean audio signal.

Is the Bass Boost controller on the amplifier set too high?
Slowly turn the controller back until you hear a clean audio signal.

Is the loudness function on the head unit set too high?
Deactivate loudness or turn the loudness setting back until you can hear a clean audio signal.

Are the EQ and sound settings on the head unit set too high?
Turn down the settings for Treble, Middle and Bass or deactivate the equalizer until you can hear a clean audio signal.

ENGINE SPEED DEPENDENT NOISE CAN BE HEARD FROM THE SPEAKERS
Check the following steps:

Have the RCA cables been laid separately from the power cable in the vehicle?
If necessary, lay the cables again and make sure that the audio cables are laid separately from the power cable on the left and right in the vehicle.

Is the amplifier’s ground connection correctly connected?
Make sure that the ground connection of the amplifier is not connected directly to the negative pole of the vehicle battery. Select a suitable ground point on the vehicle body for connection. If necessary, use contact spray to improve the conductivity of the connections.

Is the conductivity of the ground cable from the vehicle battery to the body okay? Make sure that the ground connection of the vehicle battery has a stable and conductive connection to the body. If necessary, use contact spray to improve the conductivity of the connections.

AN ACTIVE OPERATED TWEETER IS DISTORTED OR CRACKED
CAUTION: Tweeters will be damaged if the frequencies are too low. Please note the manufacturer’s information on which frequency setting is recommended. To be on the safe side, pause the playback of the head unit first. Check the following steps:

Is the crossover mode switch of the relevant channel pair on the amplifier set correctly?
Set the crossover mode switch to the high pass position (HP or HPF).

Is the high pass filter of the relevant channel pair set too low on the amplifier?
First turn the high pass controller fully clockwise. Now start playback on the head unit. Then turn the high pass controller slowly counter-clockwise until you can hear a clean sound from the tweeters and produce a balanced sound together with the woofers/mid-range speakers. Make sure that the woofers/mid- range speakers are set correctly with the respective high pass and low pass controllers.

AMPLIFIER ACTIVATES THE PROTECTIVE CIRCUIT / THE PROTECT LED ILLUMINATES
Check the following steps:
Short circuit on the speaker cables

• First disconnect all speaker cables from the amplifier. Use a Multimeter to check the ohmic impedance of each loudspeaker by measuring between its plus and minus lines. With standard loudspeakers the value fluctuates between 3 and 5 ohms. The values for low-resistance subwoofers can be lower.

• The measurement shows a resistance value of less than 0.5 Ohms
  Then there is a short circuit. Remove the wiring of the affected loudspeaker at its connections. Now use the Multimeter to check the ohmic impedance directly at the loudspeaker connections by measuring between the plus and minus connections.
  The measurement shows a resistance value of more than 0.5 Ohms

• The speaker is fine, so the speaker wire appears to be defective and causing a short circuit.
  Replace the defective speaker cable. The measurement shows a resistance value of less than 0.5 Ohms

• The speaker appears to be defective and is shorting out. Replace the defective speaker.

The load impedance of the loudspeakers or the subwoofer is too low

• Compare the ohmic impedance of the connected loudspeaker or subwoofer with the technical specifications of the
  amplifier. For example, if the amplifier is only designed for 2 or 4 ohm operation, no loudspeaker with less than 2 ohms may be connected.

The cross-section of the power cables is too small

• If the cable cross-section is too small, this leads to an increased ohmic resistance and thus to a voltage drop (volt-age loss). This indicates that the amplifier consumes more power.

The increased power consumption results in a significantly higher heat development and the amplifier switches to thermal protection mode. Therefore, observe the recommended cable cross-sections in these instructions and, if necessary, lay power cables with a larger cable cross-section.

The amplifier is overheated

• The heat sink of each amplifier requires sufficient air circulation to be able to dissipate the heat generated during
  operation. If necessary, change the installation position in favor of better cooling of the amplifier or ensure better air circulation at the installation location.

• Turn off the sound system and wait about half an hour for the amplifier to cool down again. With very hot outside temperatures and strong sunlight, enormous heat develops inside the vehicle. The amplifier then activates its thermal protection circuit to prevent damage. After cooling down, the amplifier works properly again.

NOTE
All instructions in this troubleshooting refer to the entire sound system and its individual components. The features of your device may not match the functions described in the notes. Then skip this point and move on to the next one.

Audio Design GmbH
Am Breilingsweg 3 · D-76709 Kronau/Germany
Tel. +49 7253 – 9465-0 · Fax +49 7253 – 946510
www.esxaudio.de · www.audiodesign.de
© Audio Design GmbH, all rights reserved.
Technical changes and mistakes reserved.

References

• Audio Design - The Home Of Car Audio, Navigation And More ...
• ESX - Car Audio Systems

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