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The Zapco HB 501D II is a compact and powerful Class D monoblock amplifier, perfect for driving a subwoofer. Its adjustable electronic crossover, bass boost, and subsonic filter provide complete control over sound shaping. Despite its small size, the HB 501D II delivers 500 W RMS into a 2-ohm load.
Technical specifications
Power @ 4 Ω: 1 x 300 W RMS
Power @ 2 Ω: 1 x 500 W RMS
THD at rated power: < 0.5 %
THD + noise: < 0.1 %
Signal-to-noise ratio: > 90 dB
Frequency response: 20 Hz – 180 Hz (±1 dB)
Input sensitivity: 0.25 V – 6 V (low)
Connections: RCA inputs
Features:
Mono, Class D
Adjustable input sensitivity
Adjustable electronic crossover
Adjustable bass boost and subsonic filter
Dimensions: 175 mm (L) × 115 mm (W) × 45.5 mm (H)