Zapco Harmony HB 154D II 4-Channel Full-Range Class-D Micro Power Amplifier

High-Power Compact Performance: Zapco Harmony HB 154D II

Experience impressive power and clean audio dynamics in a micro footprint with the Zapco HB 154D II full-range Class-D amplifier. Delivering an impressive 150W x 4 RMS @ 4Ω and 200W x 4 RMS @ 2Ω, this compact power unit bridges up to 350W x 2 RMS @ 4Ω, making it an ideal choice for high-output front stage speakers or powering component setups alongside subwoofers.

Key Features & Highlights

• High-Output Class-D Architecture: Packs 800W RMS total power into an ultra-compact chassis with low power draw and minimal heat generation.

• Flexible Multi-Channel Power: Delivers 150W x 4 @ 4Ω, 200W x 4 @ 2Ω, and bridges to 350W x 2 @ 4Ω.

• Universal Integration: Equipped with both RCA Low-Level and Speaker High-Level inputs for easy connectivity to factory radios or aftermarket head units.

• Variable Crossover Tuning: Integrated electronic crossovers allow precise High-Pass (HPF) and Low-Pass (LPF) frequency adjustments.

• Ultra-Compact Aluminum Footprint: Premium brushed black aluminum chassis measuring just 180 mm x 115 mm x 45.5 mm for effortless installation in tight vehicle spaces.

Technical Specifications

• Brand: Zapco

• Series: Harmony Blue

• Model: HB 154D II

• Amplifier Topology: Full-Range Class D

• Channels: 4-Channel

• RMS Power Output @ 4 Ohm: 150 Watts x 4

• RMS Power Output @ 2 Ohm: 200 Watts x 4

• Bridged Power Output @ 4 Ohm: 350 Watts x 2

• Frequency Response: 20 Hz – 20,000 Hz (±1dB)

• Signal-to-Noise Ratio (S/N): > 90 dB

• THD + Noise: < 0.1%

• THD @ Rated Power: < 0.5%

• Input Sensitivity: 0.25V – 6.0V (Low-Level RCA)

• Input Types: RCA Low-Level & Speaker High-Level Inputs

• Crossover Control: Variable Electronic High-Pass / Low-Pass Crossovers

• Dimensions (L x W x H): 180 mm x 115 mm x 45.5 mm (7.08" x 4.52" x 1.79")

Frequently Asked Questions

Is the Zapco HB 154D II powerful enough to run a subwoofer?

Yes! In 3-channel mode (bridged), it outputs 350W RMS @ 4Ω on the bridged channels, providing plenty of power for a component speaker pair plus a dedicated subwoofer.