Hertz HMD1 – 1-Channel Marine Amplifier for Subwoofers up to 1000 W
The Hertz HMD1 is a compact monoblock for marine use, reliably powering subwoofers on board. 1-ohm stable, with up to 1000 W output power and flexible integration via RCA or high-level – ideal if you want clear, powerful bass on your boat.
Its wide operating voltage range of 6.5–17 VDC makes it impervious to fluctuations in the ship's power supply. Adjustable filters and an automatic turn-on function (ART) facilitate connection to factory or aftermarket radios. This makes the HMD1 a sleek, robust solution for subwoofer setups at sea – available at Carhifi.shop.
Technical Highlights
- Channels: 1 (monoblock)
- Power Supply and Control
- Power Supply Voltage / Fuse: 11–15 VDC / 2 × 30 A
- Operating Voltage Range: 6.5–17 VDC
- Idling Current: 1.3 A
- Idling Current in Off State: 0.05 mA
- Consumption @ 14.4 VDC, 2 Ω, Max Musical Power: 50 A
- Remote IN: 6.5–15 VDC (1 mA)
- ART Auto Turn-On from BTL Speaker Output (selectable): 2–7 VDC
- Amplifier Performance
- Distortion (THD) @ 1 kHz, 4 Ω, 70% Rated Power: 0.1%
- Damping Factor @ 1 kHz, 4 Ω, 2 VRMS: 140
- Bandwidth (−1.5 dB): 10 Hz – 500 Hz
- S/N Ratio (A-weighted @ 1 V Input), Master Input: 110 dBA
- Input Sensitivity Pre-In (selectable): 0.6 / 2.0 / 6.0 VRMS
- Input Sensitivity Speaker-In (selectable): 2.0 / 6.5 / 20 VRMS
- Minimum Load Impedance: 1 Ω
- Adjustable Crossovers: Yes
Output Power
- 1 Channel @ 4 Ω: 500 W
- 1 Channel @ 2 Ω: 800 W
- 1 Channel @ 1 Ω: 1000 W
- Total Power RMS: 1000 W
Connections
- Pre-In: RCA
- High-Level (Speaker Inputs): wired
Installation & Compatibility
The HMD1 is designed for use on boats and safely powers single or multiple subwoofers depending on the wiring – even in low-impedance setups thanks to 1-ohm stability. You can connect it via RCA to a suitable preamplifier output or via high-level to factory radios. The ART function automatically turns on the amplifier when a signal is present at the speaker output. Note the on-board electrical system protection with 2 × 30 A and an appropriately sized power supply.
Dimensions & Weight
- Maximum Size (W × H × D): 243 × 48 × 159 mm
- Weight: 1.98 kg
