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PZi100.4 / PZi125.4 / PZi175.4 / 4 CHANNEL AMPLIFIER APPLICATIONS
4 CHANNEL FULL RANGE SYSTEM
2 or 3 CHANNEL FULL RANGE SYSTEM
Channels 3/4:
Here we show how to use the 4 channel amplifiers as straightforward discrete 4
- HI PASS: N/A
channel full range units.
- LOW PASS: N/A
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:
Minimum final loudspeaker impedances:
- 1/2CH X-OVER: FULL
- 2-Ohms per channel.
- 3/4CH X-OVER: FULL
Crossover frequency control checklist:
Channels 1/2:
- HI PASS: N/A
- LOW PASS: N/A
Channels 1/2:
Here we show how to use the 4 channel amplifiers as full range 2 or 3 channel units
- HI PASS: N/A
by taking advantage of the mono bridging capability of all Crunch amplifiers.
- LOW PASS: N/A
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
Channels 3/4:
to also mono bridge channel pair 1 / 2.
- HI PASS: N/A
- LOW PASS: N/A
Interconnect cable checklist:
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit
TIP: 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.
Level control checklist:
Important: Do not be tempted to connect the hot, or positive outputs, from any
- Refer to the section “Setting up systems after installation for best performance”
source together to obtain a mono signal, as this could very well damage the output
stage of that source.
Minimum final loudspeaker impedances:
- It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter
- 2-Ohms per channel in stereo mode.
RCA cable.
- 4-Ohms mono bridged.
- 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
- 3/4CH X-OVER: FULL
Crossover frequency control checklist:
5
GND REM +12V
POWER INPUT FUSE
POWER
PROTECT
CH 3/4 SPEAKER OUTPUT
BRIDGED
-LEFT+ RIGHT+
+ - -
CH ½ SPEAKER OUTPUT
BRIDGED
LEFT RIGHT
+- + - + +
LINE INPUT
LINE OUTPUT
R
L
CH3/4 CH1/2
CH3 CH4
CH1 CH2
CHANNEL 1 / 2
CHANNEL 3 / 4
+ - gnd - +
+ - gnd - +
HI INPUT
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF
X-OVER
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF
X-OVER
CHANNEL
2 3 4
MODE
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 BATTERY + 12 Volts VIA FUSE
GND REM +12V
POWER INPUT FUSE
POWER
PROTECT
CH 3/4 SPEAKER OUTPUT
BRIDGED
LEFT RIGHT
- + - -+
CH ½ SPEAKER OUTPUT
BRIDGED
LEFT RIGHT
- + - - +
LINE INPUT
LINE OUTPUT
R
L
CH3/4 CH1/2
CH3 CH4
CH1 CH2
CHANNEL 1 / 2
CHANNEL 3 / 4
+ - gnd + +
+ - gnd +-+
HI INPUT
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF
X-OVER
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF
X-OVER
CHANNEL
2 3 4
MODE
FULL RANGE
SPEAKERS
FULL RANGE
STEREO LINE
INPUTS
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY + 12 Volts VIA FUSE
R
R
L
L