GPA1000.4 / GPA1500.4 / / GPA2000.4 4 CHANNEL AMPLIFIER APPLICATIONS. Crunch Ground Pounder

GPA1000.4 / GPA1500.4/ GPA2000.4 4 CHANNEL AMPLIFIER APPLICATIONS

4 CHANNEL FULL RANGE SYSTEM

Here we show how to use the 4 channel amplifiers as straight forward discrete 4 channel full range units.

Interconnect cable checklist:

- Connect the four inputs of the amplifier to a Radio/CD with quality RCAcables.

Switch setting checklist:

- 1/2CH X-OVER:

- 3/4CH X-OVER:

FULL

FULL

MODE: 4 CHANNEL

Crossover frequency control checklist:

Channels 1/2:

- HI PASS: N/A

- LOW PASS: N/A

Channels 3/4:

- HI PASS: N/A

- LOW PASS: N/A

Level control checklist:

- Refer to the section “Setting up systems after installation for best performance”

Minimum final loudspeaker impedances:

- 2-Ohms per channel.

FULL RANGE

SPEAKERS

FULL RANGE

STEREO LINE

INPUTS

2 or 3 CHANNEL FULL RANGE SYSTEM

Here we show how to use the 4 channel amplifiers as full range 2 or 3 channel units by taking advantage of the mono bridging capability of all Crunch amplifiers.

The following example shows how to create a 3 channel system by mono bridging channel pair 3 / 4. In order to create a 2 channel system, simply follow the example to also mono bridge channel pair 1 / 2.

Interconnect cable checklist:

- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit with good quality RCA cables.

- A MONO signal source is required to bridge channel pair 3/4, such as would be available from the mono sub bass output of an active crossover, whether standalone, or built into a head unit or equalizer.

Important: Do not be tempted to connect the hot, or positive outputs, from any source together to obtain a mono signal, as this could very well damage the output stage of that source.

- It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter

RCA cable.

- Connect the mono speaker positive terminal to the LEFT +, and its negative terminal to RIGHT - as shown.

Switch setting checklist:

- 1/2CH X-OVER: FULL or HPF (high pass)

-

- 3/4CH X-OVER:

MODE:

FULL or LP (low pass)

4 CHANNEL

TO BATTERY + 12 Volts VIA FUSE

REMOTE TURN-ON

CHASSIS GROUND

Crossover frequency control checklist:

Channels 1/2:

- HI PASS: N/A

- LOW PASS: N/A

Channels 3/4:

- HI PASS: N/A

- LOW PASS: N/A

TIP: If you are using the mono sub bass output of an active crossover, there is nothing wrong with switching in the low pass filter in these amplifiers for a steeper low pass rolloff.

Level control checklist:

- Refer to the section “Setting up systems after installation for best performance”

Minimum final loudspeaker impedances:

- 2-Ohms per channel in stereo mode.

- 4-Ohms mono bridged.

FULL RANGE

LINE INPUTS

MONO LINE

INPUTS

MONO

OR SUB BASS

SPEAKER

FULL RANGE

SPEAKERS

TO BATTERY + 12 Volts VIA FUSE

REMOTE TURN-ON

CHASSIS GROUND

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GPA1000.1 / GPA1500.1 / GPA2000.1 GPA3000.1 1 CHANNEL APPLICATION

Basic application

These sub bass amplifiers can be used in any of the bi-amplification systems described in this manual, replacing the 2 channel amplifiers as per the illustrations.

LOW PASS: 40Hz to 150Hz

SUBSONIC:15 Hz to 55 Hz

BASS EQ: 0 to +9dB

Interconnect cable checklist:

Connect the inputs to a suitable source, e.g. a head unit with good quality RCA cables.

Connect the LINE OUT to the inputs of the system highs amplifier.

Level control checklist:

Refer to the section “Setting up systems after installation for best performance”

Use at least #12 gauge speaker wiring. The amps have dual speaker terminals, simplifying the hookup of multiple speakers

Minimum final loudspeaker impedance: The GPA1000.1 & GPA1500.1 are 4 & 2-

Ohm stable only (not 1-Ohm stable).

The GPA200.1 & GPA3000.1 are 4, 2 & 1-Ohm stable.

Crossover frequency control checklist:

MONO

SUBWOOFER

TO BATTERY + 12 Volts VIA FUSE

REMOTE TURN-ON

CHASSIS GROUND

DESIGNATED

MONO OUTPUT

FROM HEAD UNIT

PARALLEL MONO

SUBWOOFERS

2-OHMS EACH MINIMUM

FULL RANGE

STEREO LINE INPUT

Y-ADAPTOR

NOT USED

Note: You can use the Radio/CD designated mono line output or a full range stereo line output.

For full range stereo line output, you will need an optional “Y-Adaptor” as shown.

FEATURES

MAXX Output Power Rating

4 Ohm

2 Ohm

1 Ohm

Mono Bridged at 4 Ohm

Mono Bridged at 2 Ohm

Mono Bridged at 1 Ohm

General Specifications

Frequency Response -3dB

Total Harmonic Distortion

Variable Input Gain Control

Protection (short / thermal / overload)

Crossover Operation

Variable Hi-Pass

Variable Low-Pass

Variable Subsonic Filter

Bass EQ at 45Hz

Line Out

Hi Input

Unbalanced Input (RCA Jack)

Balanced Input (Din Jack)

Phone Jack for Remote Control

Remote Control Accessory

Miscellaneous

Power Terminal

Speaker Terminal

Fuse Number & Size

Line Out L x H x W

GPA700.2

2 x 175

2 x 350 n/a

1 x 700 n/a n/a

15Hz - 45KHz

0.05%

0.2V - 6V

Yes

60Hz - 1.2KHz

30Hz - 250Hz n/a

0dB - 9dB

Yes

Yes

Yes

No

No

2 CHANNEL

GPA1100.2

2 x 225

2 x 550 n/a

1 x 1100 n/a n/a

15Hz - 45KHz

0.05%

0.2V - 6V

Yes

60Hz - 1.2KHz

30Hz - 250Hz n/a

0dB - 9dB

Yes

Yes

Yes

No

No

GPA1800.2

2 x 450

2 x 900 n/a

1 x 1800 n/a n/a

15Hz - 45KHz

0.05%

0.2V - 6V

Yes

60Hz - 1.2KHz

30Hz - 250Hz n/a

0dB - 9dB

Yes

Yes

Yes

No

No

GPA1000.4

4 x 125

4 x 250 n/a

2 x 500 n/a n/a

15Hz - 45KHz

0.05%

0.2V - 6V

Yes

60Hz - 1.2KHz

30Hz - 250Hz n/a

0dB - 9dB

Yes

Yes

Yes

No

No

4 CHANNEL

GPA1500.4

4 x 185

4 x 375 n/a

2 x 750 n/a n/a

15Hz - 45KHz

0.05%

0.2V - 6V

Yes

60Hz - 1.2KHz

30Hz - 250Hz n/a

0dB - 9dB

Yes

Yes

Yes

No

No

GPA2000.4

4 x 450

4 x 900 n/a

2 x 1000 n/a n/a

15Hz - 45KHz

0.05%

0.2V - 6V

Yes

60Hz - 1.2KHz

30Hz - 250Hz n/a

0dB - 9dB

Yes

Yes

Yes

No

No

4-Ga.

4-Ga.

4-Ga.

4-Ga.

4-Ga.

4-Ga.

10-Ga.

10-Ga.

10-Ga.

10-Ga.

10-Ga.

10-Ga.

1 x 20 amp 2 x 20 amp 2 x 25 amp 2 x 10 amp 2 x 20 amp 2x 25 amp

9.21" x 2.23" x 9.1" 12.36" x 2.23" x 9.1" 13.94" x 2.23" x 9.1" 11.18" x 2.23" x 9.1" 12.36" x 2.23" x 9.1" 13.94" x 2.23" x 9.1"

FEATURES

MAXX Output Power Rating

4 Ohm

2 Ohm

1 Ohm

Mono Bridged at 4 Ohm

Mono Bridged at 2 Ohm

Mono Bridged at 1 Ohm

General Specifications

Frequency Response -3dB

Total Harmonic Distortion

Variable Input Gain Control

Protection (short / thermal / overload)

Crossover Operation

Variable Hi-Pass

Variable Low-Pass

Variable Subsonic Filter

Bass EQ at 45Hz

Line Out

Hi Input

Unbalanced Input (RCA Jack)

Balanced Input (Din Jack)

Phone Jack for Remote Control

Remote Control Accessory

Miscellaneous

Power Terminal

Speaker Terminal

Fuse Number & Size

Line Out L x H x W

GPA1000.1

1 x 500

1 x 1000 n/a n/a n/a n/a

15Hz - 150Hz

0.05%

0.2V - 6V

Yes n/a

40Hz- 150Hz

15Hz - 55Hz

0dB - 9dB

Yes

No

Yes

No

Yes

MONO BLOCK

GPA1500.1

GPA2000.1

1 x 750

1 x 1500 n/a n/a n/a n/a

15Hz - 150Hz

0.05%

0.2V - 6V

Yes n/a

40Hz- 150Hz

15Hz - 55Hz

0dB - 9dB

Yes

No

Yes

No

Yes

1 x 500

1 x 1000

1 x 2000 n/a n/a n/a

15Hz - 150Hz

0.05%

0.2V - 6V

Yes n/a

40Hz- 150Hz

15Hz - 55Hz

0dB - 9dB

Yes

No

Yes

No

Yes

GPA3000.1

1 x 750

1 x 1500

1 x 3000 n/a n/a n/a

15Hz - 150Hz

0.05%

0.2V - 6V

Yes n/a

40Hz- 150Hz

15Hz - 55Hz

0dB - 9dB

Yes

No

Yes

No

Yes

4-Ga.

4-Ga.

4-Ga.

4-Ga.

10-Ga.

2 x 20 amp

10-Ga.

2 x 25 amp

10-Ga.

3 x 25 amp

10-Ga.

100 amp ANL

13.94" x 2.23" x 9.1" 14.72" x 2.23" x 9.1" 17.87" x 2.23" x 9.1" 19.84"x 2.23" x 9.1"

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