Congratulations on your purchase of a CRUNCH BLACKMAXX Amplifier. These quality audio products are designed and engineered to afford you years of uncompromised musical service. CRUNCH has utilized the latest electronic technologies in order to deliver a superb listening experience.

Contents

General Installation Notes, Installation of the amplifier, Electrical Connection.. Channel Amplifier - Features.... Channel Amplifier - Features.... Channel Amplifier - Applications, One 2 Channel Amplifier in Stereo Mode.... Channel Amplifier - Applications, One 2 Channel Amplifier in Mono/Subwoofer Mode... Channel Amplifier - Applications, One 4 Channel Amplifier with Front-/Rear Speakers... Channel Amplifier - Applications, One 4 Channel Amplifier in Mono/Subwoofer Mode with two Subwoofers.. Channel Amplifier - Applications, One 4 Channel Amplifier in 3 Channel Mode with Stereo Front Speakers and Mono Subwoofer... Channel Amplifier - Applications, One 4 Channel Amplifier in Stereo Mode (Front-/Rear Speakers) with One 2 Channel Amplifier in Mono/Subwoofer Mode... 25 Specifications..... 27
General Installation Notes
The amplifier is generally mounted in the rear trunk area but can be mounted in any convenient area such as beneath a seat. Please be sure to locate this unit where you have reasonable air circulation and protection from moisture. When considering the mounting location you should minimize the length of the power and speaker leads. Minimizing both leads will yield a more reliable installation. It is also important to ensure that the heat sink fins are not against a panel or a surface, preventing air circulation. Do not install the amplifier on a subwoofer box or on vibrating parts of the vehicle, since the vibrations can cause damage to the amplifiers electrical components.
Installation of the amplifier
Mark the location for the mounting screw holes by using the amplifier as a template. Drill holes at the marked locations and firmly fasten the amplifier in place with the mounting screws supplied in the accessory kit. Before drilling or cutting any holes, investigate the layout of your automobile thoroughly: Take care when working near the gas lines or hydraulic lines and electrical wiring.

Electrical Connection

Ground (GND) This wire is the electrical ground and must be fastened securely to the vehicle chassis. The best method is to use a threading sheet metal screw since the threads cut into bare metal. Ensure that all paint or other insulation is remove from around the hole area, and using self tapping screw, securely affix the bare wire ends to the vehicle chassis. Use as short a piece of cable as possible - use the same gauge as was used for the +12V cable. Make sure that the connection is safe, a loose connection may result in amplifier noise and fault condition. Remote (REM) Many radios or other music sources have an output terminal for connection of the remote turn-on of the power amplifier. If a radio doesn't have a remote turn-on feature, then you can use the antenna relay wire, which activates the antenna motor. Please note, if the power antenna retracts when the radio is operating, then you cannot use the antenna relay wire to operate the remote turn-on. Batterie Connection (+12V) This wire is usually connected directly to the positive battery terminal. Ensure that the + power supply wire is fused via an assigned fuse in line with the + power supply wire. Please use a sufficient gauge for the installed amplifiers (min. 10-16 mm for MXB-280/MXB2175/MXB-480 or min 16-25 mm for MXB-2300/MXB-4125/MXB-4175).This connection must be completed using spade lug with insulating sleeve. Fuses The integrated amplifier fuses protect the units from short circuit and overload. The fuse rating is for 4 Ohm loads (impedance) of the speakers, for 2 Ohm loads the fuses may have to get increased by up to 50% in case of higher power consumption.

BATTERY

CHASSIS GROUND

REMOTE

2 Channel Amplifier - Features MXB-280/MXB-2175/MXB-2300

FILTER - SWITCH

This switch will route the output of the full range (FLAT), or a low pass (LOW PASS), or the output of the high pass (HIGH PASS) filter to the internal power amplifier

HIGH-/LOWPASS - ADJUST

HIGH PASS - The built in high pass filter is fully variable from 60Hz to 1200Hz (1.2KHz), with a rolloff of 12dB/octave LOW PASS - The built in low pass filter is fully variable from 40Hz to 150Hz, with a rolloff of 12dB/octave
This allows you to match the amplifier input sensitivity to the output level of the source (head unit)

BASS BOOST

Allows you to adjust the bass boost from 0dB up to 12dB

POWER - LED

It indicates amplifier has turn on signal

PROTECT - LED

It indicates the fault operation of the amplifier. When the fault conditions (overload, excessive heat or short circuit of speaker) arise, the protection curcuit is engaged to protect both the speakers and the amplifier against damage.

HI INPUT

Accepts speaker level inputs from head units that do not have line level (RCA) outputs
LINE LEVEL - INPUT OUTPUT
Provides a full range line level (RCA) output that allows the use of additional amplifiers Accepts line level (RCA) inputs from 0.2 to 4 Volts
4 Channel Amplifier - Features MXB-480/MXB-4125/MXB-4175
HIGH PASS - The built in high pass filter is fully variable from 60Hz to 1200Hz (1.2KHz), with a rolloff of 12dB/octave
LOW PASS - The built in low pass filter is fully variable from 40Hz to 150Hz, with a rolloff of 12dB/octave Accepts line level (RCA) inputs from 0.2 to 4 Volts

INPUT SELECT

Allows you to chose 2 or 4 channel operations

BASS BOOST POWER - LED

It indicates amplifier has turn on signal Allows you to adjust the bass boost from 0dB up to 12dB

OUTPUT

Provides a full range line level (RCA) output that allows the use of additional amplifiers
2 Channel Amplifier - Applications MXB-280/MXB-2175/MXB-2300
One 2 Channel Amplifier in Stereo Mode
Interconnect cable checklist:
Connect the LINE LEVEL INPUT of the amplifier to the head unit line output with good quality RCA to RCA cables. Connect the speakers with the terminal block (SPEAKERS/ + L - and + R -) of the amplifier. The minimum final speaker impedance must not be below 2 Ohm per channel. Too low speaker loads result in too high heat dissipation and may cause the amplifier run into protection. Please observe speaker channel and polarity as printed by the speaker terminal block. Incorrect phasing of the speakers results in total loss of bass response.

Caution Be careful not to connect speaker (-) to the ground or vehicle chassis. FILTER SELECT
If larger than 20 cm speakers are used, the FLAT position is recommended. For all smaller speakers (8.7cm - 16cm) the Highpass-Position (HIGH PASS) is recommended, which eliminates the lowest frequencies and protects the speakers from damage. Set the crossover-frequency between 60Hz - 150Hz, depending of the size of the installed speakers. The Highpass adjustment can be done with the HIGH PASS control. In this configuration example the LOW PASS control is not used.
Turn the INPUT LEVEL control on the amplifier to 4V position. Turn the head unit volume control to about 80-90% of its full setting. Turn the INPUT LEVEL control clockwise until you hear some distortion. Then turn back the INPUT LEVEL control slightly until you can hear clean sound.
Turn the BASS BOOST control into 0dB - position.
Speakers (Right) 2 - 8 Ohms
Green: Left Speaker White: Left Speaker + Black: Ground Brown: Right Speaker + Gray: Right Speaker R L
Connect RCA cable from head-unit with RCA input (LINE LEVEL INPUT).
Speakers (Left) 2 - 8 Ohms
One 2 Channel Amplifier in Mono/Subwoofer Mode
Connect the LINE LEVEL INPUT of the amplifier to the head unit line output with good quality RCA to RCA cables. Connect the speakers with the terminal block (SPEAKERS/ + BRIDGED -) of the amplifier. The minimum final speaker impedance must not be below 2 Ohm per channel. Too low speaker loads result in too high heat dissipation and may cause the amplifier run into protection. Please observe speaker channel and polarity as printed by the speaker terminal block. Incorrect phasing of the speakers results in total loss of bass response.
In 1 Channel/Mono-Mode select the Lowpass-Position (LOW PASS), which eliminates the higher frequencies. The recommended crossover frequency ranges between 60 - 100Hz, depending on the size and response of the Subwoofer. The Lowpass adjustment can be done with the LOW PASS control. In this configuration example the HIGH PASS control is not used.

The BASS BOOST - Control increases the bass level at 45 Hz max. +12dB. Caution! Please use the Bass-Boost carefully. The additional boost may result in clipping or overload.

Subwoofer 4 - 8 Ohms

4 Channel Amplifier - Applications MXB-480/MXB-4125/MXB-4175
One 4 Channel Amplifier with Front-/Rear Speakers
Connect the head unit line outputs with good quality RCA to RCA cables to the INPUT CH1&2 / CH3&4 of the amplifier. Connect the Front-/Rear Speakers with the terminal blocks (SPEAKERS / + CH1 -, + CH2 -, + CH3 -, and + CH4 -) of the amplifier. The minimum final speaker impedance must not be below 2 Ohm per channel. Too low speaker loads result in too high heat dissipation and may cause the amplifier run into protection. Please observe speaker channel and polarity as printed by the speaker terminal block. Incorrect phasing of the speakers results in total loss of bass response.
Caution Be careful not to connect speaker (-) to the ground or vehicle chassis. FILTER SELECT (CH1/2 & CH3/4)
INPUT LEVEL (CH1/2 & CH3/4)
Turn the INPUT LEVEL controls on the amplifier to 4V position. Turn the head unit volume control to about 80-90% of its full setting. Turn the INPUT LEVEL controls clockwise until you hear some distortion. Then turn back the INPUT LEVEL controls slightly until you can hear clean sound.
BASS BOOST (CH1/2 & CH3/4)
The INPUT SELECT - switch must be in 4 - position.
Green: Left Speaker White: Left Speaker + Black: Ground Brown: Right Speaker + Gray: Right Speaker -

Rear-Speakers 2 - 8 Ohms

Connect RCA outputs from head-unit with RCA inputs (INPUT CH1/2 and CH3/4).
Front-Speakers 2 - 8 Ohms
One 4 Channel Amplifier in Mono/Subwoofer Mode with two Subwoofers
Connect the head unit line outputs with good quality RCA to RCA cables to the INPUT CH1&2 of the amplifier. Connect the Subwoofers with the terminal blocks (SPEAKERS / + BRIDGED - from Channel 1&2 and + BRIDGED - from Channel 3&4) of the amplifier. The minimum final speaker impedance must not be below 4 Ohm per channel pair. Too low speaker loads result in too high heat dissipation and may cause the amplifier run into protection. Please observe speaker channel and polarity as printed by the speaker terminal block. Incorrect phasing of the speakers results in total loss of bass response.

In Mono/Subwoofer-Mode select the Lowpass-Position (LOW PASS), which eliminates the higher frequencies. The recommended crossover frequency ranges between 60 - 100Hz, depending on the size and response of the Subwoofers. The Lowpass adjustment can be done with the LOW PASS control. In this configuration example the HIGH PASS control is not used.
The INPUT SELECT - switch must be in 2 - position.
Connect RCA outputs from head-unit with RCA inputs (INPUT CH1/2).

Subwoofer 4 - 8 Ohm Ohms

One 4 Channel Amplifier in 3 Channel Mode with Stereo Front Speakers and Mono/Subwoofer
Connect the head unit line outputs with good quality RCA to RCA cables to the INPUT CH1&2 / CH3&4 of the amplifier. Connect the Front Speakers with the terminal block (SPEAKERS / + CH1 - and + CH2 ) of the amplifier. Connect the Subwoofer with the terminal block (SPEAKERS / + BRIDGED - from Channel 3&4) of the amplifier. The minimum final speaker impedance must not be below 2 Ohms Stereo and 4 Ohms Mono. Too low speaker loads result in too high heat dissipation and may cause the amplifier run into protection. Please observe speaker channel and polarity as printed by the speaker terminal block. Incorrect phasing of the speakers results in total loss of bass response.
Caution Be careful not to connect speaker (-) to the ground or vehicle chassis.
FILTER SELECT (Front Speakers Channel 1&2)
X-OVER SELECT (Subwoofer Channel 3&4)
In Mono/Subwoofer-Mode select the Lowpass-Position (LOW PASS), which eliminates the higher frequencies. The recommended crossover frequency ranges between 60 - 100Hz, depending on the size and response of the Subwoofer. The Lowpass adjustment can be done with the LOW PASS control. In this configuration example the HIGH PASS control is not used.
Turn the BASS BOOST control from the Front Speakers (Channel 1&2) into 0dB - position. The BASS BOOST - Control from the Subwoofer (Channel 3&4) increases the bass level at 45 Hz max. +12dB. Caution! Please use the Bass-Boost carefully. The additional boost may result in clipping or overload.
One 4 Channel Amplifier in Stereo Mode (Front-/Rear- Speakers) with One 2 Channel Amplifier in Mono/Subwoofer Mode (Bass Amplifier)
Connect the INPUT of the 4 Channel Amplifier to the head unit line outputs with good quality RCA to RCA cables. Connect the OUTPUT of the 4 Channel Amplifier with the LINE LEVEL INPUT of the designated Bass Amplifier (2 Channel Amplifier) with a further RCA cable. Connect the Front-/Rear Speakers with the terminal blocks (SPEAKERS / + CH1 -, + CH2 -, + CH3 - and + CH4 -) of the 4 Channel Amplifier. Connect the Subwoofer with the terminal block (SPEAKERS / + BRIDGED -) of the designated Bass Amplifier (2 Channel Amplifier). The minimum final speaker impedance must not be below 2 Ohms for the 4 Channel Amplifier, the total impedance of the Subwoofer(s) must not be below 4 Ohms. Too low speaker loads result in too high heat dissipation and may cause the amplifier run into protection. If you use more than one speaker (Subwoofer), make sure that both are connected in phase. Incorrect polarity of the speakers results in total loss of bass response.

Caution Be careful not to connect speaker (-) to the ground or vehicle chassis. Control settings of the 4 Channel Amplifier: FILTER SELECT (CH1/2 & CH3/4)
Control settings of the Bass Amplifier (2 Channel Amplifier): FILTER SELECT
INPUT LEVEL see descriptions for 4 Channel Amplifier above BASS BOOST

Bass Amplifier

Connect OUTPUT of 4 Channel Amplifier with LINE LEVEL INPUT of Bass Amplifier.

4 Channel Amplifier

Rear Speakers 2 - 8 Ohms
MXB-280 Channels Output Power Ratings at 14.4 Volts W Watts at 4 Ohm load - RMS / MAX. Watts at 2 Ohm load - RMS / MAX. Output Power Ratings at 14.4 Volts bridged Watts at 4 Ohm load - RMS W Watts at 4 Ohm load - Max. Frequency response -3dB Damping factor Signal to noise ratio Channel seperation >70dB 0.10 % 0.2 - 4 Volts 47 kOhms >90dB > 150 20Hz - 30kHz 20Hz - 30kHz > 150 >90dB >70dB 0.10 % 0.2 - 4 Volts 47 kOhms 1 x x x x x x 1200 20Hz - 30kHz > 150 >90dB >70dB 0.10 % 0.2 - 4 Volts 47 kOhms 2 x 80 / x 175 / x 60 / x 110 / x 175 / x 300 / 4

MXB-2175

MXB-480

MXB-4125 4

x 60 / 80
4 x 85 / x 80 / x x 320 20Hz - 30kHz > 150 >90dB >70dB 0.10 % 0.2 - 4 Volts 47 kOhms
THD & N Input Gain Control Input Impedance Crossover Channel 1 & 2 Full/Lowpass/Highpass Variable Highpass Crossover 12 dB Variable Lowpass Crossover 12 dB BassBoost Control at 45Hz Crossover Channel 3 & 4 Full/Lowpass/Highpass Variable Highpass Crossover 12 dB Variable Lowpass Crossover 12 dB BassBoost Control at 45Hz RCA Line Outputs High Level Inputs Fuses Heatsink size in mm Width x Height Lenght -

0.2 - 4 Volts

47 kOhms
Full/LP/HP 60Hz - 1.2kHz 40Hz - 150Hz
Full/LP/HP 60Hz - 1.2kHz 40Hz - 150Hz 0dB bis +12dB 0dB bis +12dB

Full/LP/HP

0dB bis +12dB 0dB bis +12dB

Fullrange

5 Pin Plug
Full/LP/HP 60Hz - 1.2kHz 40Hz - 150Hz 0dB bis +12dB Fullrange
0dB bis +12dB 0dB bis +12dB Fullrange

5 Pin Plug x2

Fullrange 2x 15 Ampere 251 x 2x 20 Ampere 262 x 2x 30 Ampere 262 x 2x 20 Ampere 262 x 52 285
* All specifications subject to change without notice

Specifications

REV2.0