ST-X Series

ST-X SQ III — sound-quality amplification engineered for the serious competitor and daily listener alike.

Everyone wants great sound in their car, but not everyone wants to compete in sound-offs. Zapco put its 40+ years of experience to work and developed a line of amplifiers that everyone could afford — lightweight, compact, and true to Zapco's heritage. The Studio-X SQ III series adds a new high-efficiency finned chassis with temperature-controlled fans so your amplifier plays all day long without overheating.

The Studio-X SQ III Class AB amps deliver less than 0.05% THD+noise and over 95 dB signal-to-noise. The Studio-X Class D mono bass amps cover 400 W to 2,000 W RMS — all 1 Ω stable and strapable together to double power, giving you from 400 W to 4,000 W in a compact, affordable package.