Zapco ST-5X II

There are seven full range amplifiers in the Studio-X series and all are Class A/B and all use bi-polar output devices for the smoothest possible sound. And, all are packed with all those features you want. Common features of the ST-X amplifiers include variable HP/LP/ Full Range electronic crossovers, variable bass boost, variable gain by channel pair, speaker level input, heavy duty positive lock terminal blocks and preamp outputs to daisy chain out to the next amp in your system without having to add more RCA cables. And the most important feature shared by all the ST-X amps is the legendary Zapco sound quality, developed with over 40 years of experience.

The ST-5X is the All-In-One Studio amp. The ST-5X mates the ST-4X P with 80W/Ch. x 4 @ 4 Ω to a bass amp with 200 Watts RMS @ 4Ω. This is truly a powerhouse in a compact chassis. Like the other ST-X amps the ST-5X is Class A/B even on the bass end, so you get tight solid  bass. You can bridge this amp at 4Ω and get 300W RMS x 2 and 300Watts x 1. The ST-5X has an input mode switch so you can use six channels of input, or only four, or even just two channels and get all 5 channels of output. So if you only have a stereo head unit you can still drive front and rear speakers plus a subwoofer. Altogether, a lot of punch in not a lot of space. Of course the ST-5X doesn’t have the pre-outs…it has the next amp already built in.

Features and Functions:

• 5-Channel, Full Range, Class A/B
• Variable input gain control
• Variable electronic crossover
• Auto-on with Speaker level inputs
• Compact chassis
• Variable bass boost control

Specifications:

• Power @ 4Ω: 4 x 100 watts Plus 1 x 200 watts
• Power @ 2Ω: 4 x 150 watts Plus 1 x 300 watts
• Power Bridged @ 4Ω: 2 x 300 watts RMS Plus 1 x 300 watts
• THD @ Rated Power < 0.5%THD
• Signal to Noise Ratio > 95dB
• THD + Noise < 0.5%
• Channel Separation >60dB
• Frequency Response 15Hz to 30KHz ±1dB
• Input Sensitivity .25v to 5v
• Dimensions in mm: 160(W) x 52(H) x 392(L) Overall: 160(W) x 52(H) x 432(L)