DS18 NXL-M4 4-Channel Marine Amplifier
Key features
- 4-channel Class D amplification
- 230W RMS per channel at 2 ohms; 150W RMS per channel at 4 ohms
- Total Watts (Peak): 1800W
- RMS Power @ 4 ohm: 4 x 150W
- RMS Power @ 2 ohm: 4 x 230W
- RMS Power @ 4 ohm Bridge: 2 x 440W
DS18 NXL-M4 4-Channel Marine Amplifier is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Power four speakers from one marine amplifier with the DS18 NXL-M4 4-channel marine amplifier. It delivers 230W RMS per channel at 2 ohms or 150W RMS per channel at 4 ohms, with selectable crossover settings to help match your installation.
Key Features & Benefits
- Four amplified channels: Power multiple speakers from a single amplifier.
- Selectable crossover: Choose HPF, LPF, or FULL mode, with a filter range of 40Hz–2KHz.
- Two input options: Use low-level RCA or four-channel speaker-level input, and select 2-channel or 4-channel input mode.
- IP55 water-splash rating: The rating is for water splashing and does not permit intentional submersion.
- Protected, UV-compliant design: The amplifier has a coated PCB, UV protection, and listed overload, thermal, and electrical protections.
Technical Specifications
| Total Watts (Peak) | 1800W |
| RMS Power @ 4 ohm | 4 x 150W RMS |
| RMS Power @ 2 ohm | 4 x 230W RMS |
| RMS Power @ 4 ohm Bridge | 2 x 440W |
| Frequency Response | 20Hz - 20KHz |
| Signal to Noise Ratio | >90dB |
| Efficiency @ 4ohm | >97% |
| Channel Separation | >55dB |
| Total Harmonic Distortion (THD) | <0.15% |
| Low Level Input Range | 0.2V-6V |
| High Level Input | Yes: ≥5V |
| Selectable X-Over | HPF/LPF/FULL |
| X-Over Filter Range | 40Hz - 2KHz |
| Bass Boost Range | 0-12dB |
| Bass Boost Frequency | 45Hz ±5Hz |
| Phase Selector | No |
| Amplifier Class | Digital (D) |
| Amplifier Type | Stereo Full Range |
| Number of Channels | 4 Channels |
| Minimum Impedance | 2 ohm (Stereo) / 4 ohm (Bridge) |
| Led Indicator | Clipping / Protect / Power |
| Power Input Terminal Size | 4 Ga |
| Fuse Size | 70A (2x35A) |
| Thermal Protection | Yes |
| Over-Load Protection | Yes |
| DC Output Protection | Yes |
| Short Circuit Output Protection | Yes |
| Voltage Input Protection | Yes |
| Clipping Protection | Yes |
| Body Color / Finish | Gray+White / Aluminum+ABS |
| Water Resistant Rated | Yes, IP55 (Water Splashing) |
| PCB Layout Design | 4 Layers / Coated |
| RCA Output | Yes, 2 CH (Left / Right) |
| UV Compliant | Yes, UV Protected and PCB Coated |
| Input Sum Selector | Yes, 2Ch or 4Ch Input Mode |
| Tiffany Style RCA | Yes |
| High Level Input | Yes, 4ch Speaker level |
| Stainless Steel Hardware | Yes, (Screws) |
| Potenciometers | High Quality Metal Knob |
| Remote Level Control | No |
| Overall Length | 9.6" / 245mm |
| Overall Wide | 4.5" / 116mm |
| Overall Height | 1.7" / 43mm |
| Heatsink Length | 8.6" / 220mm |
Why Choose This Product?
The NXL-M4 combines four-channel amplification with selectable input and crossover options. Its published power ratings vary by speaker impedance, so you can use the ratings to plan around your system’s speaker loads. The 2-channel or 4-channel input mode offers a choice in how the signal is supplied.
Its IP55 water-splash rating, UV protection, and coated PCB are relevant design details for marine installations. The rating does not make the amplifier suitable for intentional submersion.
Installation & Compatibility Notes
Check the mounting space against the amplifier’s overall dimensions and heatsink length. Plan wiring and the listed 70A (2x35A) fuse requirement before installation.
Match speaker impedance to the operating mode: the minimum is 2 ohm in stereo or 4 ohm bridged. Set crossover options to suit your installation, and follow the manufacturer instructions. Keep connections protected from water; the IP55 rating does not permit intentional submersion.
Frequently Asked Questions
How much RMS power does the DS18 NXL-M4 deliver?
It is rated at 4 x 150W RMS at 4 ohms and 4 x 230W RMS at 2 ohms. Bridged output is listed as 2 x 440W at 4 ohms.
What is the minimum speaker impedance?
The listed minimum is 2 ohm for stereo operation and 4 ohm when bridged. Match the connected speakers to the selected configuration.
Can I use RCA or speaker-level input?
Yes. The specifications list low-level input from 0.2V-6V and four-channel speaker-level input. The input selector supports 2-channel or 4-channel input mode.
Is this amplifier waterproof?
It is rated IP55 for water splashing. This rating does not permit intentional submersion, so protect connections during installation.
Will it fit my installation location?
Compare the available mounting space with its 9.6" / 245mm length, 4.5" / 116mm width, and 1.7" / 43mm height. The heatsink length is 8.6" / 220mm.
Explore More
Shop the DS18 NXL-M4 at 12 Volt Outlet. Want to learn more about DS18? Explore our DS18 brand profile.
