Hertz Marine HMD1 24V Mono Amp Class D 1 Channel Subwoofer Amplifier 1000w RMS
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The Hertz Marine HMD1 24V is a single-channel Class D mono subwoofer amplifier built for 24V marine installations, delivering 1000W RMS at 1 ohm. It is part of the Hertz Marine HMD range and is designed to work as a power extension for the HMD8 DSP.
For the matching 24V 8-channel DSP amplifier, see the Hertz Marine HMD8 DSP 24V.
Key specifications
- Channels: 1 (mono), Class D
- Power supply: 22 to 34 V DC (24V systems), fuse 2 x 15 A; operating range 14 to 36 V DC
- Idle current: 0.7 A
- Power output: 1000W @ 1 ohm, 800W @ 2 ohm, 500W @ 4 ohm
- Minimum load impedance: 1 ohm
- Bandwidth: 10 Hz – 500 Hz
- Inputs: RCA pre-in and wired speaker-in
- Adjustable crossovers: yes
- Dimensions: 243 x 48 x 159 mm
The HMD1 24V adds one or more marine subwoofers to a vessel's audio system. Stable at 1 ohm and rated at up to 1000W, it achieves this in an extremely compact footprint that can be installed in almost any position on board.
Features
- Class D output stage combines sound quality with high efficiency in a compact enclosure.
- Marine-grade epoxy-coated PCB boards protect electronic components against corrosion in wet environments.
- Tested to ASTM-B117 salt fog spray standards for full resistance to corrosion.
- IP64 protection rating — fully protected against water jets, making it suitable for demanding marine use.
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Specification
| Channels | 1 |
|---|---|
| Power supply voltage / fuse | 22 ÷ 34 VDC / 2 x 15A |
| Operating power supply voltage | 14 ÷ 36 VDC |
| Idling current | 0.7 A |
| Idling current off | 0.07 mA |
| Remote IN | 6.5 ÷ 34 VDC (1 mA) |
| Damping factor @ 1 kHz, 4Ω, 2 VRMS | 140 |
| Bandwidth @ -1.5 dB | 10 Hz ÷ 500 Hz |
| 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 | 1Ω |
| Adjustable Crossovers | yes |
| 1Ch @ 4Ω | 500 W |
| 1Ch @ 2Ω | 800 W |
| 1Ch @ 1Ω | 1000 W |
| Total Power | 1000 W |
| Pre-In Inputs | RCA |
| Speaker-In Inputs | Wired |
| Max size W x H x D (mm/inch) | 243 x 48 x 159 / 9.56 x 1.8 x 6.25 |
| Weight | (kg/lbs) 1,98 (4.36) |
More specs
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What's Included
- HMD1 24V
Hertz
About the Hertz HMD1 24V
From our tech experts at CEN
A marine amplifier, 1 channel, rated at 1000w RMS, coated and sealed against damp and salt air, and built for 24V systems.
Who it suits
Boats, ribs and commercial craft, plus open builds where an amplifier will get damp. The 24V design suits larger vessels running that system voltage.
Our tech experts advise
Mount it ventilated and as dry as the vessel allows, and fuse the feed at the battery. Marine installs want tinned cable and sealed joints throughout. get in touch and we will talk through mounting, wiring and power for your boat.
Explore the full Hertz range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Hertz
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Frequently Asked Questions
Q: How much power does the HMD1 24V produce?
A: It delivers 500W at 4 ohms, 800W at 2 ohms and 1000W at 1 ohm, from a single channel.
Q: Is the HMD1 24V for 12V or 24V boats?
A: The HMD1 24V is the 24V version of the HMD1 mono amplifier, designed for vessels with a 24V electrical system.
Q: Can the HMD1 24V be used with the HMD8 DSP?
A: Yes. Hertz designed the HMD1 as the ideal power extension of the HMD8 DSP, adding one or more marine subwoofers to the system.
