Zapco ST-4X II Four Channel Car Audio Amplifier

There are numerous 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. 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.

Features:

• Input sensitivity control - Sets sensitivity anywhere 200mV to over 5 volts.
• Variable crossovers - Each channel has fully adjustable crossovers.
• Multi-level input - Accepts both high and low level inputs.
• Remote sensing - When using high-level input you can use auto sensing meaning you don't need a trigger wire.  

Specifications:

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

Specifications:

• Power @ 4Ω: 4 x 50 watts
• THD @ Rated Power  < 0.5%THD
• Power @ 2Ω: 4 x 80 watts
• Power Bridged @ 4Ω: 2 x 160W RMS
• 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 260(L) - Overall: 160(W) x 52(H) x 302(L)