MXB2250 - Car stereo Crunch - Free user manual and instructions

USER MANUAL MXB2250 Crunch

Black-and-white line drawing of a traditional Chinese architectural structure with arches and columns, no visible text or symbols

3D CAD model of a rectangular metal plate with mounting holes and a central hole (no text or symbols)

Top-down line drawing of a car's front view showing dashboard, steering wheel, and seat (no text or symbols)

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Top-down line drawing of a car interior with no text or symbols

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Top-down line drawing of a car viewed from the side, showing front, rear, and side views with no text or symbols.

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Top-down line drawing of a car front view showing speaker and sound waves (no text or symbols)

Kabelanschlüsse

Top-down line drawing of a car viewed from the side, showing front, rear, and side views with no text or symbols.

Kabelanschlüsse

Top-down schematic of a car showing front, rear, side, and interior components (no text or labels)

Kabelanschlüsse

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

Page

General Installation Notes, Installation of the amplifier, Electrical Connection.... 16

2 Channel Amplifier - Features.... 17

4 Channel Amplifier - Features.... 18

2 Channel Amplifier - Applications, One 2 Channel Amplifier in Stereo Mode.... 19

2 Channel Amplifier - Applications, One 2 Channel Amplifier in Mono/Subwoofer Mode.... 20

4 Channel Amplifier - Applications, One 4 Channel Amplifier with Front-/Rear Speakers.... 21

4 Channel Amplifier - Applications, One 4 Channel Amplifier in Mono/Subwoofer Mode with two Subwoofers.... 22

4 Channel Amplifier - Applications, One 4 Channel Amplifier in 3 Channel Mode with Stereo Front Speakers and Mono Subwoofer.... 23

4 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

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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.

3D CAD model of a rectangular metal plate with mounting holes and a central hole (no text or symbols)

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 mm² for MXB-280/MXB-2125/MXB-2200/MXB-480 or min 16-25 mm² for MXB-2250/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.

CHASSIS GROUND REMOTE BATTERY CHASSIS GROUND

2 Channel Amplifier - Features

MXB-280/MXB-2125/MXB-2200/MXB-2250

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 INPUT LEVEL This allows you to match the amplifier input sensitivity to the output level of the source (head unit) POWER - LED It indicates amplifier has turn on signal HI INPUT Accepts speaker level inputs from head units that do not have line level (RCA) outputs OUTPUT Provides a full range line level (RCA) output that allows the use of additional amplifiers LINE LEVEL - LINE OUTPUT 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 BASS BOOST Allows you to adjust the bass boost from 0dB up to 12dB 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 circuit is engaged to protect both the speakers and the amplifier against damage. LINE LEVEL - INPUT Accepts line level (RCA) inputs from 0.2 to 4 Volts

4 Channel Amplifier - Features

MXB-480/MXB-4100/MXB-4125/MXB-4175

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 INPUT SELECT Allows you to chose 2 or 4 channel operations POWER - LED It indicates amplifier has turn on signal INPUT BASS BOOST 0dB-12dB FILTER HIGH PASS LOW PASS FLAT POWER HI INPUT +1 +2 - LOW PASS 60Hz-1.2K 4V INPUT SELECT 2/4ch INPUT LEVEL OUTPUT L R CH1 Ch3 CH2 CH4 HI INPUT +3 - +4 - PROTECT BASS BOOST 0dB-12dB FILTER HIGH PASS LOW PASS FLAT OUTPUT Provides a full range line level (RCA) output that allows the use of additional amplifiers INPUT LEVEL This allows you to match the amplifier input sensitivity to the output level of the source (head unit) 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 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 circuit is engaged to protect both the speakers and the amplifier against damage.

2 Channel Amplifier - Applications

MXB-280/MXB-2125/MXB-2200/MXB-2250

One 2 Channel Amplifier in Stereo Mode

Top-down line drawing of a car's front view showing dashboard, steering wheel, and seat (no text or symbols)

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.

INPUT LEVEL

• 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.

BASS BOOST

- Turn the BASS BOOST control into "0dB" - position.

HI INPUT Gray: Left Speaker + Brown: Left Speaker - Black: Ground White: Right Speaker + Green: Right Speaker - Connect RCA cable from head-unit with RCA input (LINE LEVEL INPUT). crunch BLACKMAXX Speakers (Right) 2 - 8 Ohms Speakers (Left) 2 - 8 Ohms

2 Channel Amplifier - Applications

MXB-280/MXB-2125/MXB-2200/MXB-2250

One 2 Channel Amplifier in Mono/Subwoofer Mode

Top-down line drawing of a car interior with no text or symbols

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/ + 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.

Caution

Be careful not to connect speaker (-) to the ground or vehicle chassis.

FILTER SELECT

• 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.

INPUT LEVEL

• 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.

BASS BOOST

• 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.

HI INPUT Gray: Left Speaker + Brown: Left Speaker - Black: Ground White: Right Speaker + Green: Right Speaker - Connect RCA cable from head-unit with RCA input (LINE LEVEL INPUT). BRANCH crunch BLACKMASS SMALL BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH BRANCH

4 Channel Amplifier - Applications

MXB-480/MXB-4100/MXB-4125/MXB-4175

One 4 Channel Amplifier with Front-/Rear Speakers

Top-down line drawing of a car viewed from the side, showing four seat compartments (no text or symbols)

Interconnect cable checklist:

• 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)

• 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.

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)

- Turn the BASS BOOST control into "0dB" - position.

INPUT SELECT

- The INPUT SELECT - switch must be in "4" - position.

HI INPUT Gray: Left Speaker + Brown: Left Speaker - Black: Ground White: Right Speaker + Green: Right Speaker - crunch Blackmaxx Connect RCA outputs from head-unit with RCA inputs (INPUT CH1/2 and CH3/4). Rear-Speakers 2 - 8 Ohms Front-Speakers 2 - 8 Ohms

4 Channel Amplifier - Applications

MXB-480/MXB-4100/MXB-4125/MXB-4175

One 4 Channel Amplifier in Mono/Subwoofer Mode with two Subwoofers

Top-down line drawing of a car front view showing speaker and floor-mounted components (no text or symbols)

Interconnect cable checklist:

• 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.

Caution

Be careful not to connect speaker (-) to the ground or vehicle chassis.

FILTER SELECT (CH1/2 & CH3/4)

• 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 Subwoofers. The Lowpass adjustment can be done with the LOW PASS control.
• In this configuration example the HIGH PASS control is not used.

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 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.

INPUT SELECT

- The INPUT SELECT - switch must be in "2" - position.

HI INPUT Gray: Left Speaker + Brown: Left Speaker - Black: Ground White: Right Speaker + Green: Right Speaker - crunch Connect RCA outputs from head-unit with RCA inputs (INPUT CH1/2). BLACKMAXX Subwoofer 4 - 8 Ohms + - + - + - + - + - Subwoofer 4 - 8 Ohms

4 Channel Amplifier - Applications

MXB-480/MXB-4100/MXB-4125/MXB-4175

One 4 Channel Amplifier in 3 Channel Mode with Stereo Front Speakers and Mono/Subwoofer

Top-down line drawing of a car viewed from the side, showing front, rear, and side views with no text or symbols.

Interconnect cable checklist:

• 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)

• 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.

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.

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)

• 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.

INPUT SELECT

- The INPUT SELECT - switch must be in "4" - position.

4 Channel Amplifier - Applications

MXB-480/MXB-4100/MXB-4125/MXB-4175

One 4 Channel Amplifier in 3 Channel Mode with

Stereo Front Speakers and Mono/Subwoofer

HI INPUT Gray: Left Speaker + Brown: Left Speaker - Black: Ground White: Right Speaker + Green: Right Speaker - Connect RCA outputs from head-unit with RCA inputs (INPUT CH1/2 and CH3/4). BRUNCH BLACKMAXX Subwoofer 4 - 8 Ohms + - + -

Front-Speakers 2 - 8 Ohms

4 Channel Amplifier - Applications

MXB-480/MXB-4100/MXB-4125/MXB-4175

One 4 Channel Amplifier in Stereo Mode (Front-/Rear- Speakers) with One 2 Channel Amplifier in Mono/Subwoofer Mode (Bass Amplifier)

Top-down schematic of a car showing front, rear, and side views with no text or symbols

Interconnect cable checklist:

• 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)

• 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.

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)

- Turn the BASS BOOST control into "0dB" - position.

INPUT SELECT

- The INPUT SELECT - switch must be in "4" - position.

Control settings of the Bass Amplifier (2 Channel Amplifier):

FILTER SELECT

- 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.

INPUT LEVEL

• see descriptions for 4 Channel Amplifier above

BASS BOOST

- 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.

4 Channel Amplifier - Applications

MXB-480/MXB-4100/MXB-4125/MXB-4175

One 4 Channel Amplifier in Stereo Mode (Front-/Rear- Speakers) with One 2 Channel Amplifier in Mono/Subwoofer Mode (Bass Amplifier)

Bass Amplifier crunch Connect OUTPUT OF 4 Channel Amplifier with LINE LEVEL INPUT OF Bass Amplifier. BLACKMAXX Subwoofer 4 - 8 Ohms HI INPUT Gray: Left Speaker + Brown: Left Speaker - Black: Ground White: Right Speaker + Green: Right Speaker - 4 Channel Amplifier crunch Rear Speakers 2 - 8 Ohms BlackMAXX Front-Speakers 2 - 8 Ohms Connect RCA outputs from head-unit with RCA inputs (INPUT CH1/2 and CH3/4).

Specifications

	MXB-280	MXB-2125	MXB-2200	MXB-2250	MXB-480	MXB-4100	MXB-4125	MXB-4175
Channels	2	2	2	2	4	4	4	4
Output Power Ratings at 14.4 Volts
Watts at 4 Ohm load - RMS / MAX.	2 x 60 / 80	2 x 75 / 125	2 x 125 / 200	2 x 150 / 250	4 x 60 / 80	4 x 85 / 125	4 x 110 / 175
Output Power Ratings at 14.4 Volts and Bridges	2 x 80 / 160	2 x 125 / 250	2 x 200 / 400	2 x 250 / 500	4 x 80 / 160	4 x 125 / 250	4 x 175 / 350
Watts at 4 Ohm load - RMS / MAX.	1 x 160	1 x 250	1 x 400	1 x 500	2 x 160	2 x 250	2 x 350
Watts at 4 Ohm load - RMS	1 x 320	1 x 500	1 x 800	1 x 1000	2 x 320	2 x 400	2 x 500
Frequency Response -db	20HZ - 30KHZ	20HZ - 30KHZ	20HZ - 30KHZ	20HZ - 30KHZ	20HZ - 30KHZ	20HZ - 30KHZ	20HZ - 30KHZ
Signal to noise ratio	>90dB	>90dB	>90dB	>90dB	>90dB	>90dB	>90dB
Channel Separation	>70dB	>70dB	>70dB	>70dB	>70dB	>70dB	>70dB
THD & N	0.10 %	0.10 %	0.10 %	0.10 %	0.10 %	0.10 %	0.10 %
Input Gain Control	0.2 - 4 Volts	0.2 - 4 Volts	0.2 - 4 Volts	0.2 - 4 Volts	0.2 - 4 Volts	0.2 - 4 Volts	0.2 - 4 Volts
Input Impeadance	47 KOhms	47 KOhms	47 KOhms	47 KOhms	47 KOhms	47 KOhms	47 KOhms
Crossover Channel 1 & 2
Full/lowpass/Highpass	Full/LP/HP	Full/LP/HP	Full/LP/HP	Full/LP/HP	Full/LP/HP	Full/LP/HP	Full/LP/HP
Variable Highpass Crossover 12 dB	60HZ - 1.2KHZ	60HZ - 1.2KHZ	60HZ - 1.2KHZ	60HZ - 1.2KHZ	60HZ - 1.2KHZ	60HZ - 1.2KHZ	60HZ - 1.2KHZ
Variable Lowpass Crossover 12 dB	40HZ - 150HZ	40HZ - 150HZ	40HZ - 150HZ	40HZ - 150HZ	40HZ - 150HZ	40HZ - 150HZ	40HZ - 150HZ
Bassboost Control at 45HZ	0dB bis +12dB	0dB bis +12dB	0dB bis +12dB	0dB bis +12dB	0dB bis +12dB	0dB bis +12dB	0dB bis +12dB
Crossover Channel 3 & 4
Full/lowpass/Highpass	-	-	-	Full/LP/HP	Full/LP/HP	Full/LP/HP	Full/LP/HP
Variable Highpass Crossover 12 dB	-	-	-	60HZ - 1.2KHZ	60HZ - 1.2KHZ	60HZ - 1.2KHZ	60HZ - 1.2KHZ
Bassboost Control at 45HZ	-	-	-	-	0dB bis +12dB	0dB bis +12dB	0dB bis +12dB
Crossover Channel 3 & 4
Full/lowpass/Highpass	-	-	-	Full/LP/HP	Full/LP/HP	Full/LP/HP	Full/LP/HP
Variable Highpass Crossover 12 dB	-
Variable Lowpass Crossover 12 dB	-	-	-	-	40HZ - 150HZ	40HZ - 150HZ	40HZ - 150HZ
Bassboost Control at 45HZ	-	-	-	-	0dB bis +12dB	0dB bis +12dB	0dB bis +12dB
Crossover Channel 3 & 4

* All specifications subject to change without notice