Zapco Studio X Series - Manual (Page 7)

9. Front Gain: This control balances output of the head unit to the input of
the amp and with the rear amp channels
10. Rear Outputs: These provide an RCA output to drive the front channels if
the head unit has only one RCA out. Connect a short RCA between the
Rear out and the Front In.
11. LPF: If you use the rear low pass crossover, this control determines fre-
quency 20Hz to 1KHz
12. HPF: If you use the rear high pass crossover, this control determines fre-
quency 80Hz to 3KHz
1. GND The amp should have a firm connection the car frame. * See sec-
tion "Install Sense"
2. REM The remote terminal connects to the head unit remote out, or to
some other switched 12 volt source to turn on the amplifier.
3. +12V The main 12 volt must be connected directly to the vehicle’s
battery using wire of the proper gauge. * See section
"Install Sense"
4. Speaker connections The heavy duty terminal block provides positive
speaker connections. Simple insert the wire and cinch down the set
screw. Note that the Mono bridge positions are L+ to R
- , for both front
and rear speaker sets
5. LED Indicators let you know the status of the amplifier. The green LED
1 2 3 4
6 5
ST-4X Output