Crunch P1-650.2 User Manual

P1-650.4 / P1-1050.4 / P1-1650.4 4-CHANNEL AMPLIFIER APPLICATIONS

4 CHANNEL FULL RANGE SYSTEM

2 or 3 CHANNEL SYSTEM

- HI PASS: N/A

Here we show how to use the 4 channel amplifiers as straight forward discrete 4

- LOW PASS: N/A

channel full range units. The MODE switch should be in 4CH.

Channels 3/4:

Interconnect cable checklist:
- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.

- HI PASS: N/A
- LOW PASS: N/A

Switch setting checklist:
- 1/2CH X-OVER: FULL

Level control checklist:

“Setting up systems after installation for best performance”

- 3/4CH X-OVER:

- Refer to the section

FULL

Minimum final loudspeaker impedances:

Crossover frequency control checklist:

- 2 ohm per channel.

Channels 1/2:

Switch setting checklist:

Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking

- 1/2CH X-OVER: FULL

advantage of the mono bridging capability of all Crunch amplifiers.

- 3/4CH X-OVER: LPF

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

Crossover frequency control checklist:

the example to also mono bridge channel pair 1 / 2.

Channels 1/2:
- HI PASS: N/A

Interconnect cable checklist:

- LOW PASS: N/A

- MODE: Set at 4
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head

Channels 3/4:

unit with good quality RCA cables.

- HI PASS: N/A

- A MONO signal source is required to bridge channel pair 3/4, such as would be

- LPF: 11 o’clock

available from the mono sub bass output of an active crossover, whether
standalone, or built into a head unit or equalizer. If you only have 1 set of RCA

TIP: If you are using the mono sub bass output of an active crossover, there is

outputs from your headunit, you can simply connect those to the inputs for ch

nothing wrong with switching in the low pass filter in these amplifiers for a

1/2 and switch the MODE to 2ch. The amplifier will auto sum the signal and

steeper low pass rolloff.

provide mono output for bridged channels 3/4.
Important: Do not be tempted to connect the hot, or positive outputs, from any

Level control checklist:

source together to obtain a mono signal, as this could very well damage the

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

output stage of that source.
- It is necessary to feed the SAME signal to both left and right inputs via a Y-

Minimum final loudspeaker impedances:

adapter RCA cable.

- 2 ohm per channel in stereo mode.

- Connect the mono speaker positive terminal to the CH4 +, and its negative

- 4 ohm mono bridged.

terminal to CH3 - as shown.

POWERONE

LINE INPUT

LINE OUT

CHANNEL

3 / 4

CHANNEL

1 / 2

30Hz 250Hz 60Hz 12KHz 0dB 9dB 6V 0.2V

LPF HPF BASS EQ LEVEL

FULL

LPF

HPF

X-OVER

FULL

LPF

HPF

X-OVER

4 2

MODE

Ch1

Ch2

Ch3

Ch4

POWER

PROTECT

GND REM +12V

CH 3/4 SPEAKER OUTPUT

BRIDGED

CH4 CH3

- + - +

BRIDGED

CH2 CH1

- + - -+

CH 1/2 SPEAKER OUTPUT

FULL RANGE

STEREO LINE

INPUTS

POWERONE

LINE INPUT

LINE OUT

CHANNEL

3 / 4

CHANNEL

1 / 2

30Hz 250Hz 60Hz 12KHz 0dB 9dB 6V 0.2V

LPF HPF BASS EQ LEVEL

FULL

LPF

HPF

X-OVER

FULL

LPF

HPF

X-OVER

4 2

MODE

Ch1

Ch2

Ch3

Ch4

POWER

PROTECT

GND REM +12V

CH 3/4 SPEAKER OUTPUT

BRIDGED

CH4 CH3

- + - +

BRIDGED

CH2 CH1

- + - -+

CH 1/2 SPEAKER OUTPUT

FULL RANGE

STEREO LINE

INPUTS

MONO LINE INPUT
(Unless using procedure
listed above for 3ch)

MONO

SUBWOOFER