Zapco Studio X Series - Manual (Page 8)

tells you the amp is on. The Red LED lets you know the amp is in
“protection” because of some problem with the system.
6. Fuses The fuses protect the car should a catastrophic problem occur in
the amp. Always replace with the same size fuse
The ST-5X
Five channel, compact chassis car amplifier with mono bass section
1 1 2 3 4 5 6
8 9 10
ST-5X Input
1. RCA IN connectors for Front, Rear, and Sub are to connect the ST-5X to
an aftermarket head unit ‘s outputs (See also item 9)
2. Front and Rear Gain: These controls balance the output of the head unit
to the input of the amp and balance the front-to-rear-to-sub levels. (See
"Install Sense" section)
3. Front and Rear LPF controls set the crossover point when using the low
pass crossover filters.
4. Front and Rear Crossover selectors determine high pass, low pass, or full
range for the front and rear channels.
5. Front and rear HPF controls set the HP frequency when the high pass
crossover filters
6. LPF control sets the sub crossover frequency when using the sub low
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