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Zapco ST-6X SQ III Amplifier

ST-6X SQ III6-Channel Class A/B Sound Quality Amplifier

Overview & Key Features
The ST-6X SQ III is a 6-channel full-range Class A/B amplifier engineered for high-fidelity audio. It features upgraded sound quality components including refined op-amps and capacitors, plus panel-mount Tiffany-style RCA inputs. With both RCA and speaker-level inputs, auto turn-on, input mode selection, and a new aluminum chassis, this amp offers flexible integration and premium performance.

Features

  • 6-Channel Full-Range Class A/B Amplifier
  • SQ Component Upgrades: Op-Amps, Capacitors, etc.
  • Tiffany-Style Panel Mount RCA Inputs
  • RCA & Speaker-Level Inputs
  • Auto Turn-On with Speaker-Level Inputs
  • Variable Input Gain Control
  • Variable Electronic Crossover
  • Variable Bass Boost Control
  • Selectable 2/4/6 Channel Input Modes
  • Durable Aluminum Chassis

Technical Specifications

  • Power Output @ 4Ω: 6 x 100W
  • Power Output @ 2Ω: 6 x 150W
  • Bridged Power @ 4Ω: 3 x 300W RMS
  • THD @ Rated Power: < 0.5%
  • THD + Noise: < 0.05%
  • Signal-to-Noise Ratio: > 95 dB
  • Channel Separation: > 60 dB
  • Frequency Response: 15 Hz – 30 kHz ±1 dB
  • Input Sensitivity: 0.25V to 5V
  • Net Dimensions: 160mm (W) x 58mm (H) x 450mm (L)
  • Overall Dimensions: 160mm (W) x 58mm (H) x 475mm (L)

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