TECHNICAL DATA

MPX 4000 Stereo / Bridged 4 x 180 W / 2 x 500 W on 4 Ohm 4 x 60 W / 2 x 160 W on 4 Ohm 4 x 250 W on 2 Ohm 4 x 80 W on 2 Ohm Ohm 000 Hz (-3 dB) < 0.05% (1 kHz) > 60 dB (1 kHz) > 100 dB 400 mV 4 V 20 kOhm Hz, 12 dB per octave Hz, 12 dB per octave 012 dB at 45 Hz + 12 V (V), minus to ground 2 x 15 A 319 x 59 x 226 mm 2.65 kg
Max. output power (1 kHz sinus burst 2:8, B+=14.4V) Nominal output power (DIN 45 324, B+=14.4V) Max. output power (1 kHz sinus burst 2:8, B+=14.4V) Nominal output power (DIN 45 324, B+=14.4V) Loudspeaker impedance (stereo) Frequency response Total harmonic content (DIN 45 403) Stereo separation (IEC 581 ) Weighted noise distance (IEC A) Input sensitivity LOW LEVEL INPUT Input impedance LOW LEVEL INPUT Low-pass filter High-pass filter Bass boost Supply Fuse Sizes (W x H x D) Weight
MPX 4500 Max. output power (1 kHz sinus burst 2:8, B+=14.4V) Nominal output power (DIN 45 324, B+=14.4V) Max. output power (1 kHz sinus burst 2:8, B+=14.4V) Nominal output power (DIN 45 324, B+=14.4V) Loudspeaker impedance (stereo) Frequency response Total harmonic content (DIN 45 403) Stereo separation (IEC 581 ) Weighted noise distance (IEC A) Input sensitivity LOW LEVEL INPUT Input impedance LOW LEVEL INPUT Low-pass filter High-pass filter Bass boost Supply Fuse Sizes (W x H x D) Weight Stereo / Bridged 4 x 225 W / 2 x 600 W on 4 Ohm 4 x 80 W / 2 x 240 W on 4 Ohm 4 x 300 W on 2 Ohm 4 x 120 W on 2 Ohm Ohm 000 Hz (-3 dB) < 0.05% (1 kHz) > 60 dB (1 kHz) > 100 dB 400 mV 4 V 20 kOhm Hz, 12 dB per octave Hz, 12 dB per octave 012 dB at 45 Hz + 12 V (V), minus to ground 2 x 20 A 319 x 59 x 226 mm 2.75 kg
SUBJECT TO TECHNICAL CHANGE
FEATURES Complementary push-pull final stage Automatic switching on/off via car radio Infinitely adjustable high pass and low pass filters Infinitely variable bass equalisation Adjustable input sensitivity Bridgeable 4-/3-/2-channel mode Tri-mode Electronic protective circuit against short circuiting, DC offset and excess temperature Mute switch for suppressing switch-on crackle interference Low-level outputs (cinch jacks) for connecting a subwoofer amplifier Status indicator (green LED) and overload indicator (red LED)

IMPORTANT INSTALLATION INFORMATION This appliance may only be connected to a 12 volt system with negative ground. The heat radiated when the amplifier is used means that sufficient air circulation is required at the place of installation. It is very important that the cooler's cooler ribs do not contact any metal plating or any surfaces which could impair air circulation. The amplifier may not be installed in small confined spaces or spaces without air circulation (e.g. spare wheel recess or under the vehicle carpeting). Installation in the boot is recommended. Install the amplifier in such a way that it is protected as far as possible against vibrations and dust and dirt. Make sure that the input/output cables are sufficiently distant from the power supply cables as otherwise interference may occur. Make sure that the fuse and operating elements are accessible after installation. The appliance's reliability and performance depend on the quality of installation. Preferably get an expert to install the system, particularly if you want to install several loudspeakers or a complex multi-way system.

CONNECTIONS

4.1 POWER SUPPLY AND AUTOMATIC SWITCHING ON Important notice: Before commencing the installation, disconnect the plus terminals from the car battery in order to prevent short circuits. The power cabling usually installed in on-board car networks is not sufficient for a power amplifier's demands. Make sure that the power lines to GND and to the +12 V terminal have been sufficiently specified. A cable crosssection of at least 12 mm must be used to connect the battery to the amplifier's terminals. First connect the amplifier's GND terminal to the battery's minus pole. It is very important that the connection is good. Dirt residues must be carefully removed from the battery's connection point. A loose connection may cause malfunctions or interference noise or distortion. The +12 V amplifier connection must then be connected with a power cable possessing an integrated fuse to the battery's plus pole. The fuse should be located close to the battery; for safety reasons, the cable from the positive terminal of the battery to the fuse must not exceed 60 cm in length. Only insert the fuse when all installation work, including the connection of the loudspeakers, has been completed. Now connect the car hi-fi receiver's remote control connection to the amplifier's REM control jack. A cable with a cross-section of 0.75 mm is sufficient for connecting the amplifier's REMOTE connection and the control device.

4.2 AUDIO CABLES When installing the audio cable between the cinch output of your car receiver and the cinch input of the amplifier inside your car, the audio and power supply cables should, wherever possible, not be routed along the same side of the vehicle. We recommend an isolated installation, e.g. routing the power cable through the cable duct on the left-hand side and the audio cable through the cable duct on the right-hand side or vice versa. This reduces interference due to crosstalk into the audio cables.
4.3 LOUDSPEAKER CONNECTIONS In normal operating mode (i.e. one loudspeaker on each individual amplifier channel), the lowest terminal resistance is 2 ohm per channel. In bridging mode (two amplifier outputs combined) the lowest terminal resistance doubles to 4 ohm. The impedance in tri-mode may not fall below 2 ohm per channel. Never connect the loudspeakers' minus terminals to the vehicle chassis. Never connect the +12 V supply voltage to a loudspeaker output as this would destroy the amplifier final stage. If the amplifier is operated with lower terminal resistances or incorrectly used as described above, both the amplifier and the loudspeakers may be damaged. The warranty becomes void in such cases.
OPERATING ELEMENTS AND IN/OUTPUTS
5.1 SETTING THE INPUT SENSITIVITY The input sensitivity may be adapted to any car radio or tape deck. Turn the volume control of your radio to its central position and then adjust the input-level controls (3) and (4) to produce an average medium volume. This setting usually provides sufficient power reserves at optimum weighted noise voltage. ATTENTION: only reproduce loud test noises briefly to prevent damaging the loudspeakers.
5.2 LOW-PASS FILTER WITH ADJUSTABLE CROSS-OVER FREQUENCY If the amplifier is used as a subwoofer amplifier, set the switch (9)/(10) to "LPF". Set the desired cross-over frequency using the control (7)/(8). This makes the filter adaptable to the installed woofer's sound requirements. The filter's high edge steepness is responsible for the precision reduction of medium and high frequency ranges.
5.3 HIGH-PASS FILTER WITH ADJUSTABLE CROSS-OVER FREQUENCY If the amplifier is to be used as an amplifier for satellite loudspeakers (mid-range/tweeter loudspeakers), set switch (9)/(10) to "HPF". Set the desired cross-over frequency using the control (11)/(12). Only the frequencies above the set cross-over frequency will then be amplified. This effectively minimizes distortions caused by excessive membrane movement at low frequencies and small satellite loudspeakers without reducing the bass level.

5.4 BASS-BOOST The bass-boost function (5/6) is used to increase or equalize the lower bass frequencies.
5.5 OUTPUTS FOR CONNECTING ADDITIONAL AMPLIFIERS The input signal of the LINE INPUT connections CH1, CH2, CH3, CH4 (1 and 2, Fig. 7) is accumulated and forwarded directly to the LINE OUT (14) jacks. The LINE OUT connections allow the use of a subwoofer amplifier without requiring additional T-plugs and cables.
FIG. 1 POWER SUPPLY / REMOTE SWITCH-ON CONNECTIONS (1) (2) (3) (4) (5) (6) GND terminal for the ground, to the battery's minus pole REM terminal for remote switch-on Terminal for + 12 V battery voltage Battery Cable fuse To your car radio's automatic aerial connection If your car is not equipped with an automatic aerial connection, connect this cable's plus pole (+) to the ignition lock. An on/off switch should be inserted in this case. Make sure that this switch is switched off if the amplifier is not used.
FIG. 2 4-CHANNEL MODE Connect and set the amplifier as shown in Fig. 2 if it is to be controlled by a car radio with four output channels and used with four loudspeakers: (1) (2) (3) (4) (5) (6) (7) (8) To the car radio, front left output To the car radio, front right output To the car radio, rear left output To the car radio, rear right output Front left loudspeaker Front right loudspeaker Rear left loudspeaker Rear right loudspeaker

FIG. 3/4

3-CHANNEL MODE
The 3-channel mode uses the high-pass filter for channels 1/2 and the low-pass filter for Channels 3/4. Section 5 describes how they are used.
FIG. 3 Connect and set the amplifier as shown in Fig. 3 if it is to be controlled by a car radio with stereo output and used with stereo satellite loudspeakers and a subwoofer. (1) (2) (3) (4) (5) To the car radio, left output To the car radio, right output Left satellite loudspeaker Right satellite loudspeaker Subwoofer
FIG. 4 Connect and set the amplifier as shown in Fig. 4 if it is to be controlled by a car radio with stereo receiver and separate subwoofer output and used with stereo satellite loudspeakers and a subwoofer. (1) (2) (3) (4) (5) (6) To the car radio, left output To the car radio, right output To the car radio, subwoofer output Left satellite loudspeaker Right satellite loudspeaker Subwoofer
FIG. 5 2-CHANNEL MODE If the amplifier has to generate more power to operate two subwoofers, connect and set it as shown in Fig. 5. The use of the low-pass filter used is described in Chapter 5. (1) (2) (3) (4) To the car radio, left output To the car radio, right output Subwoofer Subwoofer
FIG. 6 USE AS AN AMPLIFIER FOR 4 SATELLITE LOUDSPEAKERS AND A SUBWOOFER USING AN ADDITIONAL 1-CHANNEL AMPLIFIER (MPX MONO) (1) (2) (3) (4) (5) (6) (7) (8) (9) To the car radio, front left output To the car radio, front right output To the car radio, rear left output To the car radio, rear right output Front left loudspeaker Front right loudspeaker Rear left loudspeaker Rear right loudspeaker Subwoofer