Zapco ST-4B 4-Channel Full Range Amplifier

**Green Bee Solutions — 4‑Channel Class‑AB Full‑Range Amplifier Clean Power. Full Control. Built to Hit Hard.** This 4‑channel Class‑AB amplifier is designed for builders who want real output, real tuning flexibility, and real Green Bee authority across their entire soundstage. Warm, powerful, and brutally reliable — this amp brings your mids and highs to life while staying stable under pressure. FULL‑RANGE MUSCLE 4‑Channel Class‑AB design for rich, detailed, high‑fidelity sound Power @ 2Ω: 4 × 90 watts of clean, controlled output Stable at 4Ω bridged or 2Ω stereo for maximum system flexibility This is the kind of amplifier that makes your front and rear stage punch with clarity and confidence. PRECISION TUNING FOR SERIOUS SYSTEMS Variable input gain control FULL / LP / HP electronic crossover Bass boost for added low‑end authority Dial in your sound exactly how you want it — tight, aggressive, and perfectly balanced. SMART, CLEAN INTEGRATION RCA and OEM speaker‑level inputs