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adjust to suit.
6 Subsonic Filter:
This is a variable control filters out all Sub Bass Frequencies below the set point at
18dB/octave.
7 Level:
This allows level adjustment of the input signal. Use this control to correctly match
the head unit to the amplifier. To set this control correctly, turn the amplifier level
to MIN and the head unit to 3/4 volume, with the BASS and TREBLE on zero , then
slowly turn up this amplifier level control towards the MAX end of the control.
NOTE: If the sound becomes distorted, turn this control down.
8 RCA Input (channel 1 & 2):
Connect these RCA connectors to the LOW LEVEL output connection from the head
unit.
9 RCA Input (channel 3 & 4):
Connect these RCA connectors to the LOW LEVEL output connection from the head
unit.
10 RCA Output:
Use these RCA Output connectors to connect to a secondary amplifier. This output
is a SUMMED OUTPUT connection derived from the RCA input connectors.
11 Ground Connection:
Connect directly to suitable ground point via a 4 gauge power cable. NOTE: This is
to be the first wire to connect. Damage could result if this is not done.
12 Remote Connection:
This input is for turning the amplifier on and off. This requires a switched positive
(+12V) to power 'ON' the amplifier, this can be found on the rear of the head unit in
the form of an electric antenna output, or a remote on output. If not available you
can wire to a switched +12V supply.
13 Power +12V Connection:
This must be connected to the battery positive (+) terminal via a 4 gauge power
cable and with an inline fuse or circuit breaker at the battery end. NOTE: This is to
be the last wire to connect up during installation as damage could result.
14 Fuses:
Please ensure the correct type of fuse is fitted, as specified in this manual. PLEASE
NOTE: the MS-AM504 has 2x 25A fuses.
15 Speaker Output:
See channel installation diagrams in this manual for correct speaker connection.
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