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Zapco ST-4X-SQ-III 4 Ch. Sound Q Class AB Amplifier


7 in stock

SKU: ST4XSQIII Category:

Features and Functions:

  • 4-Channel, Full Range, Class A/B
  • SQ Upgrades: Op-amps, Caps, Etc.
  • Tiffany style Panel Mount RCA’s
  • RCA and Speaker Level Inputs
  • Variable input gain control
  • Variable electronic crossover
  • Auto-on with Speaker level inputs
  • New aluminum chassis


  • Power @ 4Ω: 4 x 70 watts
  • THD @ Rated Power < 0.1% THD
  • Power @ 2Ω: 4 x 95 watts
  • Power Bridged @ 4Ω: 2 x 190W RMS
  • Signal to Noise Ratio > 95dB
  • Channel Separation >60dB
  • Frequency Response 15Hz to 30KHz ±1dB
  • Input Sensitivity .25v to 5v
  • Dimensions in mm: 160(W) x 58(H) x 300(L) Overall: 160(W) x 58(H) x 325(L)
Weight 4 kg
Dimensions 0.4 × 0.18 × 0.07 cm




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Zapco ST-4X-SQ-III 4 Ch. Sound Q Class AB Amplifier

Rated 0 out of 5

7 in stock