Wet Sounds HTM-4 — Full-Range Class-D 4-Channel Marine Amplifier
The Wet Sounds HTM-4 is a full-range Class-D 4-channel marine amplifier delivering up to 600W RMS, built for extreme audio applications in a compact, reduced-height chassis. Featuring selectable high-pass, low-pass, and full-range crossovers, removable power and speaker connectors, and an IPX5 rating — the HTM-4 is designed for serious marine audio systems.
$999.00
The HTM-4 is part of Wet Sounds’ HTM Series amplifier range — a 4-channel, full-range Class-D amplifier engineered for demanding marine audio applications. Whether you’re powering tower speakers and in-boat speakers simultaneously, or running a dedicated two-zone system with a subwoofer, the HTM-4 delivers the power and flexibility to handle it in a compact, reduced-height chassis.
Class-D topology delivers superior efficiency and extreme power output without the heat and bulk of traditional amplifier designs — 85W per channel at 4Ω stereo, 150W per channel at 2Ω stereo, or 300W per channel bridged at 4Ω across two channels, giving you the flexibility to configure the amplifier to suit your system’s exact requirements. Full-range audio capability ensures crystal-clear sound across the entire 20Hz to 20kHz frequency range, while selectable crossovers — high-pass, low-pass, and full range — allow precise control over what each channel delivers. The adjustable crossover range of 50Hz to 500Hz covers the majority of system configurations, and channels 3 and 4 feature a dedicated subsonic filter adjustable from 10Hz to 55Hz for subwoofer applications.
The reduced-height chassis fits into tighter installation spaces than previous HTX models without sacrificing output or features. Removable power and speaker connectors simplify installation and future maintenance, and the versatile blue LED backlit badge can be mounted horizontally or vertically to suit the installation. Optional mounting feet allow elevation from the mounting surface for additional airflow and installation flexibility. IPX5 water resistance ensures reliable performance in the marine environment. Backed by Wet Sounds’ 2-year warranty.
Specifications
- Channels: 4
- Amplifier class: Class-D
- RMS power @ 4Ω stereo: 85W × 4
- RMS power @ 2Ω stereo: 150W × 4
- RMS power @ 4Ω bridged: 300W × 2
- Frequency response: 20Hz – 20kHz (-3dB)
- S/N ratio: 95dB (A-weighted, max output)
- Input sensitivity: 350mVrms – 6Vrms
- Crossover: Selectable — Full / High-Pass / Low-Pass
- Adjustable crossover range: 50Hz – 500Hz
- Subsonic filter: 10Hz – 55Hz (channels 3/4)
- IP rating: IPX5
- Amplifier class: Class-D
