Crunch PZA1200.4 Specifications download pdf (Page 6)

PZA900.4 / PZA1200.4 / PZA1600.4 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 3CH

- 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 LEFT +, and its negative

- 4 ohm mono bridged.

terminal to RIGHT - as shown.

FULL RANGE

STEREO LINE

INPUTS

FULL RANGE

STEREO LINE

INPUTS

MONO LINE INPUT

(Unless using procedure

listed above for 3ch)

GND REM +12V

CH 3/4 SPEAKER OUTPUT

BRIDGED

RIGHT LEFT

- + - +

CH 3/4 SPEAKER OUTPUT

BRIDGED

RIGHT LEFT

- + - +

RIGHT LEFT

BRIDGED

- + - -+

CH 1/2 SPEAKER OUTPUT

RIGHT LEFT

BRIDGED

- + - -+

CH 1/2 SPEAKER OUTPUT

MONO SPEAKER

CH3/4

CH1/2

LINE INPUT

LINE OUTPUT

CHANNEL 1 / 2

CHANNEL 3 / 4

LPF

HPF

FULL

X-OVER

5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz

LEVEL BASS EQ HPF LPF

2 3 4

MODE

+ - gnd - +

HI INPUT

Ch3 Ch4

Ch1 Ch2

+ - gnd - +

R R

L L

CH3/4

CH1/2

LINE INPUT

LINE OUTPUT

CHANNEL 1 / 2

CHANNEL 3 / 4

LPF

HPF

FULL

X-OVER

5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz

LEVEL BASS EQ HPF LPF

2 3 4

MODE

+ - gnd - +

HI INPUT

Ch3 Ch4

Ch1 Ch2

+ - gnd - +

R R

L L

1 2 3 4 5 6 7 8 9 10 11 ... 14 15

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Crunch PZA1200.4 Specifications Page 6

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