Channel amplifiers na360.4, 4 channel full range stereo, 2 or 3 channel system – MB QUART Nautic User Manual
Page 7
4-Channel Amplifiers
NA360.4
6
FEATURES:
- 2 Sets of RCA inputs
- LEVEL: Variable sensitivity from 0.2V to 6V
- X-OVER: Selects internal crossover functions
- FLAT: Bypasses all crossovers for full frequency operation
- LOW: Selects the built in LOW PASS filter
- HIGH: Selects the built in HIGH PASS filter
- POWER LED: Indicates the powered up and turned on condition
- PROTECTION LED: Indicates a high voltage, low voltage, short circuit,
hard clip, over heating or DC fault condition.
- MODE: “2” indicates one set of RCA’s are being used. This will also pass signal to channels 3/4 through 1/2 inputs.
“4” indicates connecting 2 sets of RCA’s to 1/2 and 3/4 inputs.
- LINE OUTPUT: Full range RCA pass through.
- BASS EQ: Adjustable 45Hz bass boost from 0dB to 9dB
4 Channel Full Range Stereo:
Control checklist:
Interconnect cable checklist:
- Refer to the section “Settings for Best Performance”
- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.
Switch setting checklist:
Minimum final loudspeaker impedances:
- 1/2CH X-OVER: FLAT
- 2 ohm per channel.
- 3/4CH X-OVER: FLAT
MODE: “4” since 2 sets of RCA’s are connected.
Important: Do not be tempted to connect the hot, or positive outputs, from any source together
2 or 3 Channel System:
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.
Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking
- Connect the mono speaker positive terminal to the CH3 +, and its negative terminal to CH4 -
advantage of the mono bridging capability of all MB Quart amplifiers. In order to create
as shown.
a 2 channel system, simply follow the example to also mono bridge channel pair 1/2.
Interconnect cable checklist:
Switch setting checklist:
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit
- 1/2CH X-OVER: FLAT
with good quality RCA cables.
- 3/4CH X-OVER: LOW
- A MONO signal source is suggested to bridge channel pair 3/4, such as would be
Control checklist:
available from the mono sub bass output of an active crossover, whether standalone, or
- Refer to the section “Settings for Best Performance”
built into a head unit or equalizer. If you only have 1 set of RCA outputs from your
Minimum final loudspeaker impedances:
headunit, you can simply connect those to the inputs for ch 1/2 and switch the MODE to
- 2 ohm per channel in stereo mode.
2. The amplifier will auto sum the signal and provide mono output for bridged channels
- 4 ohm mono bridged.
3/4.
STEREO LINE INPUT
MONO LINE INPUT
(Unless using procedure
listed above for 2ch)
P
O
W
E
R
IN
P
U
T
P
O
W
E
R
IN
P
U
T
G
N
D
R
E
M
B
A
T
T
+
12
V
G
N
D
R
E
M
B
A
T
T
+
12
V
C
H
-3
C
H
-4
C
H
-3
C
H
-4
-
+
-
+
-
+
-
+
B
R
ID
G
E
D
B
R
ID
G
E
D
F
U
S
E
F
U
S
E
LINE OUTPUT
CH-1
CH-2
LINE INPUT
CH-3
CH-4
CH-1
CH-2
LEVEL
6V 0.2V
6V 0.2V
0dB 9dB
0dB 9dB
BASS EQ
LOW FLAT HIGH
LOW FLAT HIGH
FILTER
CHANNEL 1 & 2
CHANNEL 3 & 4
40Hz 250Hz
40Hz 250Hz
FREQUENCY
POWER
PROTECT
MODE
2CH 4CH
L
IN
E
O
U
T
P
U
T
C
H
-1
C
H
-2
L
IN
E
IN
P
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C
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-3
C
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-4
C
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-1
C
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-2
L
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V
E
L
6V
0
.2
V
6V
0
.2
V
0d
B
9
d
B
0d
B
9
d
B
B
A
S
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1
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C
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3
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40
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25
0H
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40
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z
25
0H
z
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2C
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C
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C
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P
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C
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C
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-4
C
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-1
C
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-2
L
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V
E
L
6V
0
.2
V
6V
0
.2
V
0d
B
9
d
B
0d
B
9
d
B
B
A
S
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1
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C
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A
N
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3
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40
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z
25
0H
z
40
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z
25
0H
z
F
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2C
H
4
C
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C
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-1
C
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C
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-1
C
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-2
-
+
-
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-
+
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+
B
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B
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