Zapco Studio X Series - Manual (Page 10)

The Studio X Mono Class D Amps
There are three Class D mono amps in the Studio X line,. The ST-500X at 500
watts RMS, the ST-1000XM at 1,000 watts and the ST1500XM at 1,500 watts
RMS.
The ST-500XM Input
Side
1 2 3 4 5 6
1. Remote each ST– X bass amp includes a wired dash remote for the bass
output
2. RCA inputs accept the input signal from the head unit
3. Bridge in and Bridge out are used to “strap” to ST-X mono amps so they
can work together to drive a single speaker (see following section on
strapping mono amps)
4. Gain control is used to balance the output of the head unit to the input
of the amplifier
5. LPF Being a bass amp, the STx has full time low pass bass crossover that
can vary from 40Hz to 180Hz
6. Subsonic To protect your woofers from sub sonic frequencies and to con-
serve amplifier power, a variable subsonic filter can be set from 50Hz
down to Off