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MS-A1004 CONNECTIONS
Power Inputs
1.+12V Power Input
Connect the unit to the vehicle battery using a minimum size of 8 AWG
(8mm
2 )
wire with a 60A fuse placed within 18 Inches (45.7cm) of the positive
battery terminal. Be sure to use an insulation grommet at every location where
the power wire will pass through metal.
2. Remote Turn-On Input (Optional to Connect)
No discrete remote-tum-on connection to the MS-A1004 is necessary. If your
head unit includes a remote-tum-on lead and you wish to connect it, connect
the unit to this terminal.
3. Chassis Ground Input
Using at least 8 AWG (8mm
2 )
wire, connect this terminal to a nearby point of
the vehicle's chassis (sheet metal). Scrape away the paint from the area to
ensure a good connection. Do not ground the amplifier to the vehicle's frame.
Audio Inputs
1. Using RCA Outputs
If the unit that precedes this amplifier in the signal chain includes RCA-type
output connectors, connect them directly to the RCA inputs of this amplifier.
2. Using Speaker-Level Signals
If the preceding equipment doesn't have RCA-type connectors, use the RCA-
to-bare-wire adapters included with the MS-A1004. Connect the
+
signal to
the terminal marked
+
and the - signal to the terminal marked -.
Pass-Through Audio Outputs (Full-Range)
Input channels 1 and 3 are summed and sent to the top RCA output. Inputs 2
and 4 are summed and sent to the bottom RCA output. Using these outputs,
additional amplifiers can be easily added. For example: When using the MS-
A1004 for front and rear speakers, you could use these outputs for a subwoofer
amplifier. The outputs are full-range. No high-pass or low-pass filters are applied
in the MS-A1004.
Speaker Outputs
Connect each speaker to the amplifier channel that will correspond to the input
used or how it's assigned. See "Setting the Input Mixer" to learn how to assign
the input signals to the output channel pair. Be sure to observe proper polarity
when connecting the speakers to the outputs.
1. Stereo Connection
Connect the left-channel loudspeaker(s) to the output terminals corresponding
to the left-channel input. Connect the right-channel speaker(s) to the output
terminals corresponding to the right-channel input.
2. Bridged Connection
Connect the positive terminal on the loudspeaker(s) to the positive (+) terminal
on Channel 1 (or 3). Connect the negative terminal on the speaker(s) to the
negative (-) terminal on Channel 2 (or 4).
See "System Diagrams" for examples of system configurations in which the
amplifier is most commonly used.
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