Channel amplifier oa240.2, 2 channel full range stereo, Bridged for subwoofer application – MB QUART Onyx Amplifiers User Manual
Page 6
2-Channel Amplifier
OA240.2
5
LINE OUT
LINE INPUT
L
R
L
R
LEVEL
6V 0.2V
0dB 12dB
FULL HP LP
30Hz 150Hz
10Hz 1.2kHz
BASS EQ
X-OVER
LOW PASS
HIGH PASS
POWER
PROTECTION
FEATURES:
- 1 Set of RCA inputs
- LEVEL: Variable sensitivity from 0.2V to 6V
- BASS EQ: Adjustable 45Hz bass boost from 0dB to 12dB
- X-OVER: Selects internal crossover functions
- FULL: Bypasses all crossovers for full frequency operation
- LP: Selects the built in LOW PASS filter, variable from 30Hz to 150Hz
- HP: Selects the built in HIGH PASS filter, variable from 10Hz to 1.2KHz
- 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.
- LINE OUTPUT: Full range RCA pass through.
2 Channel Full Range Stereo:
Control checklist:
Interconnect cable checklist:
- Refer to the section “Settings for Best Performance”
- Connect the two inputs of the amplifier to a Radio/CD with quality RCA cables.
Switch setting checklist:
Minimum final loudspeaker impedances:
- 1/2CH X-OVER: FULL
- 2 ohm per channel.
MODE: STEREO
Bridged for Subwoofer Application:
- Connect the mono speaker positive terminal to the LEFT +, and its negative terminal to RIGHT
Here we show how to use the 2 channel amplifiers to power a subwoofer by taking
- as shown.
advantage of the mono bridging capability of all MB Quart amplifiers.
Interconnect cable checklist:
Switch setting checklist:
- A MONO signal source is required to bridge channels 1/2, such as would be available
- X-OVER: LP
from the mono sub bass output of an active crossover, whether standalone, or built into
Control checklist:
a head unit or equalizer. If you only have 1 set of RCA outputs from your headunit, you
- Refer to the section “Settings for Best Performance”
can simply connect those to the inputs for ch ½ the amplifier will auto sum the signal
Minimum final loudspeaker impedances:
and provide mono output.
- 2 ohm per channel in stereo mode.
Important: Do not be tempted to connect the hot, or positive outputs, from any source
- 4 ohm mono bridged.
together to obtain a mono signal, as this could very well damage the output stage of
that source.
P
O
W
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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
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M
B
A
T
T
+
12
V
S
P
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A
K
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-
+
-
+
-
+
-
+
B
R
ID
G
E
D
B
R
ID
G
E
D
F
U
S
E
F
U
S
E
MONO LINE INPUT
(Unless using procedure
described above)
L
R
L
R
L
IN
E
O
U
T
L
IN
E
O
U
T
L
IN
E
IN
P
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T
L
IN
E
IN
P
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L
L
R
R
L
L
R
R
L
E
V
E
L
L
E
V
E
L
6V
0
.2
V
6V
0
.2
V
0d
B
1
2d
B
0d
B
1
2d
B
F
U
L
L
H
P
L
P
F
U
L
L
H
P
L
P
30
H
z
15
0H
z
30
H
z
15
0H
z
10
H
z
1.2
kH
z
10
H
z
1.2
kH
z
B
A
S
S
E
Q
B
A
S
S
E
Q
X
-O
V
E
R
X
-O
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E
R
L
O
W
P
A
S
S
L
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P
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S
H
IG
H
P
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P
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C
T
IO
N
P
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C
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N