PZi100.4 / PZi125.4 / PZi175.4 / 4 CHANNEL AMPLIFIER APPLICATIONS
4 CHANNEL FULL RANGE SYSTEM
2 or 3 CHANNEL FULL RANGE SYSTEM
Here we show how to use the 4 channel amplifiers as straightforward discrete 4
channel full range units.
Interconnect cable checklist:
- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.
Level control checklist:
- Refer to the section
“Setting up systems after installation for best performance”
Switch setting checklist:
- 1/2CH X-OVER:
FULL
Minimum final loudspeaker impedances:
- 2-Ohms per channel.
Crossover frequency control checklist:
Channels 3/4:
- HI PASS: N/A
- LOW PASS: N/A
- 3/4CH X-OVER:
FULL
Channels 1/2:
- HI PASS: N/A
- LOW PASS: N/A
Here we show how to use the 4 channel amplifiers as straightforward discrete 4
channel full range units.
- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.
- Refer to the section
FULL
FULL
Channels 3/4:
- HI PASS: N/A
- LOW PASS: N/A
Interconnect cable checklist:
Level control checklist:
Switch setting checklist:
- 1/2CH X-OVER:
Minimum final loudspeaker impedances:
- 3/4CH X-OVER:
- 2-Ohms per channel.
Crossover frequency control checklist:
Channels 1/2:
- HI PASS: N/A
- LOW PASS: N/A
“Setting up systems after installation for best performance”
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.
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.
Switch setting checklist:
- 1/2CH X-OVER:
FULL
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
- A MONO signal source is required to bridge channel pair 3/4, such as would be
low pass rolloff.
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.
- 3/4CH X-OVER:
FULL
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.
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit
If you are using the mono sub bass output of an active crossover, there is
with good quality RCA cables.
nothing wrong with switching in the low pass filter in these amplifiers for a steeper
- A MONO signal source is required to bridge channel pair 3/4, such as would be
low pass rolloff.
available from the mono sub bass output of an active crossover, whether
standalone, or built into a head unit or equalizer.
Do not be tempted to connect the hot, or positive outputs, from any
- Refer to the section
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.
FULL
FULL
Channels 1/2:
- HI PASS: N/A
- LOW PASS: N/A
Channels 3/4:
- HI PASS: N/A
- LOW PASS: N/A
Interconnect cable checklist:
TIP:
Level control checklist:
Important:
Minimum final loudspeaker impedances:
- 2-Ohms per channel in stereo mode.
- 4-Ohms mono bridged.
Switch setting checklist:
- 1/2CH X-OVER:
- 3/4CH X-OVER:
Crossover frequency control checklist:
“Setting up systems after installation for best performance”
5
GN
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STEREO
FULL RANGE
OR HIGHS
SPEAKERS
MONO
OR SUB BASS
SPEAKER
1 STEREO
1 MONO
FULL RANGE
LINE INPUTS
REMOTE TURN-ON
CHASSIS GROUND
TO B 12 Volts VIA FUSE
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+ -
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HI I
NP
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5V
0
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0
dB
1
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60
Hz
1
.2K
Hz
3
0H
z 2
50
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LE
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AS
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Q
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PF
L
PF
FU
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LP
F H
PF
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5V
0
.2V
0
dB
1
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60
Hz
1
.2K
Hz
3
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50
Hz
LE
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B
AS
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PF
L
PF
FU
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LP
F H
PF
X-O
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CH
AN
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L
2
3
4
M
OD
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FULL RANGE
SPEAKERS
FULL RANGE
STEREO LINE
INPUTS
REMOTE TURN-ON
CHASSIS GROUND
TO B 12 Volts VIA FUSE
R
R
L
L
