Zapco - Z-1KD II - Class D, Mono Power 2Ω: 1 x 700W, 4Ω: 1 x 450W

The Zapco Z-1KD II is a compact, high-efficiency Class D mono amplifier delivering up to 700 watts RMS at 2 ohms. Designed for clean, controlled low-frequency output, it combines Zapco’s legendary sound quality with rugged reliability. Featuring fully adjustable crossover controls, subsonic filtering, phase adjustment, and an included wired remote bass knob, the Z-1KD II offers precise tuning and powerful performance for audiophiles and competition-level subwoofer systems.

• Model: Z-1KD II
• Type: Class D High-Efficiency Mono Amplifier
• Power Output (RMS):
 • 4 Ω: 1 × 450 W
 • 2 Ω: 1 × 700 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 (variable)
• Phase Control: 0° – 180° adjustable
• Remote Control: Wired bass level remote included
• Cooling System: Heavy-duty aluminum heatsink with thermal management
• Protection Circuits:
 • Thermal protection
 • Over-current protection
 • Short-circuit protection
 • DC offset protection
 • Under/over voltage protection
• Fuse Rating: 2 × 40 A
• Power Supply: Regulated MOSFET PWM design
• Dimensions: 12.8″ (L) × 7.5″ (W) × 2.2″ (H)
• Weight: Approx. 8.2 lb (3.7 kg)
• Warranty: Standard manufacturer warranty