Quantum Q168A - Speaker ESX - Free user manual and instructions

Product type	Amplified subwoofer
Dimensions (W x H x D)	195 x 74 x 260 mm
Power supply	12 V (9 to 15 V), negative ground
Fuse	20 A
RMS output power	1 x 100 W
Max output power	1 x 200 W
Frequency range	30 – 150 Hz
Adjustable low-pass filter	50 – 150 Hz
Subsonic filter	Fixed at 30 Hz
Phase Shift	0° / 180°
Adjustable Bass Boost	0 – 12 dB @ 45 Hz
Remote bass level control	Yes (cable supplied)
Audio inputs	RCA and high-level (HI LEVEL IN)
Auto turn-on	Yes (AUTO TURN ON)
Protection circuit	LED PROTECT (overheating, short circuit)
Speaker size	15 x 20 cm (6 x 8 inches)
Installation precautions	Disconnect battery before installation; use appropriate cables

Frequently Asked Questions - Quantum Q168A ESX

What precautions should be taken before installing the Quantum Q168A subwoofer?

Before installation, disconnect the negative battery terminal to avoid short circuits. Mount the amplifier away from shocks, vibrations, dust and dirt. Keep output and input cables away from the power cable to avoid interference.

How to connect the power supply?

First connect the GND terminal to the negative battery pole. Then connect the +12 V terminal to a power cable with an integrated fuse (20 A) placed within 30 cm of the battery. Connect the REM control cable to the remote output of the car radio.

Can I use the high-level input if my car radio does not have RCA output?

Yes, the high-level input (HI LEVEL IN) allows connecting the car radio's speaker wires directly. Never use both RCA and high-level inputs simultaneously, as this would damage the device.

How does the auto turn-on (AUTO TURN ON) work?

Set the AUTO TURN ON switch to the ON position. The amplifier detects a voltage increase (DC offset) on the high-level input when the source turns on, and turns on automatically. No REM cable is needed in this case. Works with most modern sources.

How to adjust the input sensitivity?

Set the car radio volume to halfway, then adjust the amplifier's INPUT LEVEL potentiometer to achieve a medium sound volume. This ensures sufficient power reserve and a good signal-to-noise ratio.

How to use the Bass Boost?

The BASS BOOST control adjusts the bass level from 0 to 12 dB at 45 Hz. Use it sparingly to avoid distortion or speaker damage.

What does the PHASE SHIFT switch mean?

It allows inverting the signal phase between 0° and 180°. This helps synchronize the subwoofer sound with other speakers according to the vehicle's acoustics.

How to adjust the low-pass filter?

Adjust the LOW PASS potentiometer between 50 and 150 Hz to set the cutoff frequency. The lower the value, the more only deep bass is reproduced.

What to do if the PROTECT LED lights up red?

The red LED indicates overheating or a short circuit. The amplifier turns off automatically. Check the speaker connections (too low impedance) and ensure adequate ventilation. After resolution, the device will restart.

Can I use the remote bass level control?

Yes, connect the supplied remote control to the REMOTE port of the amplifier. It allows adjusting the bass level from the driver's seat without touching the device.

USER MANUAL Quantum Q168A ESX

Abstract geometric logo design with stylized letter 'S' and diagonal line (no text or symbols)

QUANTUM

Black Q18BA electronic device with ventilation grille and ports (no visible text or symbols on body)

ACTIVE SUBWOOFER SYSTEM

Q168A

VERS.1.2

INHALTSVERZEICHNIS TABLE OF CONTENT TABLE DES MATIÈRES SOMMARIO INDICE

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    A["6"] --> B["LINE INPUT"]

HOCHPEGELEINGÄNGE

AUTOMATISCHE EINSCHALTFUNKTION

Please read the user's manual carefully before the installation and the first operation of the amplifier.

SPECIFICATIONS

Subwoofer	15 x 20 cm (6" x 8")
Output Power RMS	1 x 100 W
Output Power Max	1 x 200 W
Frequency Range	20 – 150 Hz
Lowpass Filter	50 – 150 Hz
Subsonic Filter	Fixed at 20 Hz
Phase Shift	0° / 180°
Bass Boost	0 – 12 dB @ 45 Hz
Operating Voltage	+12 V (9 – 15 V), negative ground
Fuse Rating	15 A
Dimensions (B x H x L)	195 x 74 x 260 m

All Specifications are subject to change

IMPORTANT NOTES PRIOR TO INSTALLATION

• This device is only suited for a 12 volt system with negative ground.
• Ensure that the input and output cables are sufficiently separated from the power supply cables. Otherwise, interferences may occur.
• Ensure the accessibility of the fuse and the operating elements after installation.
• The reliability and performance of the amplifier depends on the quality of installation. Preferably consult an expert to install the system.
• Avoid any damage or removing of the components of the vehicle like wires, cables, board computer, seat belts, gas tank or the like.

POWER SUPPLY AND TURN-ON-CONNECTION

ATTENTION: Before you start with the installation, disconnect the ground connection from the vehicle's battery in order to prevent short circuits. Use the enclosed cable plug to connect each terminal.

The power wiring which is usually installed in on-board car networks is not sufficient for a power amplifier's demands. Make sure that the power wires to GND and to the +12V terminal has been sufficiently specified.

First connect the GND terminal [1] of the amplifier to an appropriate ground connection at the chassis. To ensure a good connection, residue dirt and dust from the connection point. A loose connection may cause malfunctions or interferences noise and distortion.

Then connect the +12 V terminal [2] of the amplifier with the battery by using an appropriate cable including an in-line fuse. This fuse [4] should be located very close to the battery [3]; for safety reasons not more than 30 cm away. Only insert the fuse when the installation, including the connection of the loudspeakers, has been accomplished.

Then connect the remote turn-on-wire [5] from the head unit with the amplifier's REM terminal. A cable with a cross-section of 0.5 mm^2 is adequate.

AUDIO SIGNAL CABLES

When installing the audio cables between the RCA outputs of the head unit and the RCA inputs of the amplifier [6], the audio and power supply cables should, if possible, not be routed along the same side of the vehicle. We recommend a separated installation, e.g. routing the power cable through the cable channel on the left side and the audio cables through the cable channel of the vehicle on the right side or vice versa. This prevents interferences due to crosstalk into the audio signal.

HIGH LEVEL INPUTS & AUTO TURN ON

The high level inputs under HI LEVEL IN [7] is suitable to connect the device input with speaker wires, if your head unit is not equipped with pre-amplifier RCA outputs. Extend therefore every regarding speaker cable from your head unit with appropriate speaker cables from your car audio retailer to the mounting location of the amplifier. Then connect the each matching loudspeaker cable with the cables of the included High Level Input jack.

CAUTION: Never use the high level inputs and the RCA inputs at the same time. This may damage the device seriously. Use the enclosed cable plug to connect each terminal.

AUTO TURN ON

Push the AUTO TURN ON switch [8] to ON position. The amplifier detects now a voltage rise (6 Volts) over the connected input signal on the HI LEVEL IN [7] when the head unit will be switched on. Hence, the amplifier will also be turned on. As soon as the head unit will be turned off, the amplifier turns also automatically off. In this case the turn-on connection [5] is not needed.

NOTE: The AUTO TURN ON function usually works with 90% of all head units, because they are equipped with "High Power"-outputs. Only with a few older and still existing head units the Auto Turn On function is not working.

INPUT SENSITIVITY

Turn the INPUT LEVEL [9] controller of the amplifier to the MIN position. Then turn the volume controller of the head unit to 80 - 90% of its full setting. Now turn INPUT LEVEL [9] clockwise until you hear some distortion. Then turn back INPUT LEVEL [9] slightly until you hear a cleaner sound.

VARIABLE BASS BOOST

By using the BASS BOOST controller [10] you are able to increase the bass enhancement from 0 to 12 dB. ATTENTION: Use the BASS BOOST wisely!

PHASE SWITCH

The PHASE SHIFT switch [11] allows to switch the phase from 0^ to 180^ to match the output signal with the vehicle's interior acoustic.

VARIABLE LOW PASS FILTER

Set the desired crossover frequency by using the controller LOW PASS [12]. Thus to that only the frequencies below the chosen crossover frequency will be amplified and the subwoofer plays more precisely and efficient.

With the included bass level cable remote controller [13] allows to adjust the bass level e.g. out of the driver's seat. Connect the remote controller and the REMOTE terminal [14] with the enclosed cable.

PROTECTION CIRCUIT

The PROTECT LED [15] lights up red, when the amplifier is overheated, or a short circuit occurs respective a too low impedance load is connected to the speaker outputs. If this events, the internal built-in protection circuit shuts down the amplifier automatically. The amplifier should work again properly after you have solved the problems.

The POWER LED [16] lights up green, if the amplifier is in operation.

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    A["6"] --> B["LINE INPUT"]
    B --> C["Circle with crescent"]

ENTRÉE HAUT NIVEAU

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    A["6"] --> B["LINE INPUT"]

INGRESSO ALTO LIVELLO

CONTROLLO REMOTO DAL LIVELLO DEI BASSI

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    A["6"] --> B["LINE INPUT"]
    B --> C["Circle with crescent"]

ENTRADAS DE ALTO NIVEL

Abstract geometric logo design with stylized letter 'S' and intersecting lines (no text or symbols)

QUANTUM

Audio Design GmbH

Am Breilingsweg 3 · D-76709 Kronau/Germany

Tel. +49 7253 - 9465-0 · Fax +49 7253 - 946510

www.audiodesign.de • www.esxaudio.de

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