PZ900.4 / PZ1200.4 / PZ1800.4 / PZ3000.4 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)
G
N
D
R
E
M
+1
2V
G
N
D
R
E
M
+1
2V
C
H
3
/4
S
P
E
A
K
E
R
O
U
TP
U
T
B
R
ID
G
E
D
R
IG
H
T
LE
FT
-
+
-
+
C
H
3
/4
S
P
E
A
K
E
R
O
U
TP
U
T
B
R
ID
G
E
D
R
IG
H
T
LE
FT
-
+
-
+
R
IG
H
T
LE
FT
B
R
ID
G
E
D
-
+
-
-+
C
H
1
/2
S
P
E
A
K
E
R
O
U
TP
U
T
R
IG
H
T
LE
FT
B
R
ID
G
E
D
-
+
-
-+
C
H
1
/2
S
P
E
A
K
E
R
O
U
TP
U
T
MONO SPEAKER
C
H
3/4
C
H
1/2
LIN
E
IN
P
U
T
LIN
E
O
U
TP
U
T
C
H
A
N
N
E
L 1
/ 2
C
H
A
N
N
E
L 3
/ 4
LP
F
LP
F
H
P
F
H
P
F
F
U
LL
F
U
LL
X
-O
V
E
R
X
-O
V
E
R
5V
0
.2
V
0
dB
9
dB
6
0H
z
1.2
K
H
z
30
H
z
25
0H
z
5V
0
.2
V
0
dB
9
dB
6
0H
z
1.2
K
H
z
30
H
z
25
0H
z
LE
V
E
L
B
A
S
S
E
Q
H
P
F
L
P
F
LE
V
E
L
B
A
S
S
E
Q
H
P
F
L
P
F
2
3
4
M
O
D
E
+
-
g
n
d
-
+
H
I IN
P
U
T
C
h
3
C
h
4
C
h
1
C
h
2
+
-
g
n
d
-
+
R
R
L
L
C
H
3/4
C
H
1/2
LIN
E
IN
P
U
T
LIN
E
O
U
TP
U
T
C
H
A
N
N
E
L 1
/ 2
C
H
A
N
N
E
L 3
/ 4
LP
F
LP
F
H
P
F
H
P
F
F
U
LL
F
U
LL
X
-O
V
E
R
X
-O
V
E
R
5V
0
.2
V
0
dB
9
dB
6
0H
z
1.2
K
H
z
30
H
z
25
0H
z
5V
0
.2
V
0
dB
9
dB
6
0H
z
1.2
K
H
z
30
H
z
25
0H
z
LE
V
E
L
B
A
S
S
E
Q
H
P
F
L
P
F
LE
V
E
L
B
A
S
S
E
Q
H
P
F
L
P
F
2
3
4
M
O
D
E
+
-
g
n
d
-
+
H
I IN
P
U
T
C
h
3
C
h
4
C
h
1
C
h
2
+
-
g
n
d
-
+
R
R
L
L
