7
ST-4B Input/Controls Ends
The ST-4B has similar functions as the ST-2B but the 4 channel layout puts the
controls in different positions.
3 4
2
5 9
7
8
12
1
6
10
11 13
1• Speaker level input plug for OEM hookup
2• Front crossover function selector for full
range of high pass
3• Front High Pass frequency control
4• Front Channels Variable gain control
(set to minimum before initial turn-on)
5• Front channels RCA inputs
6• Pass through RCA output (rear channels
can feed another amp)
7• Rear channels RCA inputs
8• Rear Channels Variable gain control
(set to minimum before initial turn-on)
9• Rear channels Bass Boost switch for 0, 6dB,
or 12dB
10• Rear Low Pass frequency control
11• Rear crossover function switch for high pass,
full range, or low pass
12• Rear High Pass frequency control
13• Green power-on LED and red protect LED
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