Zapco - ST-750D - Class D, Mono Power 2Ω: 1 X 750W, 4Ω: 1 X 400W

• Model: ST-750D

The Zapco ST-750D is a compact Class D mono amplifier engineered for clean, efficient bass power in tight installations. Delivering 750 watts RMS at 2 ohms, it combines Zapco’s signature clarity with high current output for deep, controlled low frequencies. With adjustable filters, phase control, and an included remote level knob, the ST-750D provides precision subwoofer tuning and dependable performance — perfect for daily systems or competition-style bass setups in limited space.

• Type: Class D Mono High-Efficiency Amplifier
• Power Output (RMS):
 • 4 Ω: 1 × 400 W
 • 2 Ω: 1 × 750 W
• Frequency Response: 10 Hz – 250 Hz (±1 dB)
• Signal-to-Noise Ratio: > 95 dB
• THD + N: < 0.05% at rated power
• Damping Factor: > 150 @ 100 Hz
• Input Sensitivity: 0.2 V – 8 V (variable)
• Input Impedance: 10 kΩ (unbalanced RCA)
• Low-Pass Filter (LPF): 30 Hz – 250 Hz (24 dB/octave)
• Subsonic Filter: 10 Hz – 50 Hz (24 dB/octave)
• Bass Boost: 0 – 12 dB @ 45 Hz (adjustable)
• Phase Control: 0° – 180° adjustable
• Remote Control: Wired bass level remote included
• Cooling System: Heavy-duty aluminum heatsink with smart thermal control
• Protection Circuits:
 • Thermal protection
 • Over-current protection
 • Short-circuit protection
 • DC offset protection
 • Under/over voltage protection
• Fuse Rating: 2 × 35 A
• Power Supply: High-efficiency MOSFET PWM regulated
• Dimensions: 11.8″ (L) × 7.1″ (W) × 2.2″ (H)
• Weight: Approx. 7.5 lb (3.4 kg)