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Free standard shipping on select products
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Designed for intense sessions that keep the party boat rocking; the NXL-M4 is DS18’s newest high-quality, powerful amplifier for the marine or powersport enthusiast looking for big sound with a small footprint!
As a Class D Digital amplifier, the NXL-M4 uses direct insert speaker and power terminals significantly smaller than your average amplifier, making it the perfect size for any vehicle’s custom build: but, what it lacks in size it makes up for in power.
The NXL-M4 handles 150W x 4CH @ 4 Ohms; 230W x 4CH @ 2 Ohms; and 440W x 2CH @ 4 Ohms Bridge of RMS Power and 1800W Peak Power.
Get clean, well defined sound for with enough features (Fully Variable Bass Boost, Low Pass Filter, and High Pass Filter) to tune your music perfectly for optimal audio enjoyment! This full range amplifier handles all speakers insanely well and has the features to make sure they play the way you want them to!
This amplifier is tough enough to stand up to the worst the waves throw at you! All controls are guarded by high strength front covers that guarantee impenetrable defense against the elements; coated 4 layer PCB helps prevent corrosion caused by salt water; and Voltage, Thermal, and Short Circuit Protection for easy monitoring of your power levels.
Order the NXL-M4 for insane power out on the water!
Highlights
Great For





| SPECIFICATIONS | |
| POWER | |
| 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 |
| AUDIO | |
| 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 |
| FEATURES | |
| 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 |
| Extra Features | |
| 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 |
| Measurement | |
| Overall Length | 9.6" / 245mm |
| Overall Wide | 4.5" / 116mm |
| Overall Height | 1.7" / 43mm |
| Heatsink Length | 8.6" / 220mm |
Please allow 3–7 business days for shipping. We only ship to the lower 48 states.
On some items, our live inventory may be depleted from previous days’ sales. In these cases, we may drop ship the item once it becomes available. If inventory is not in stock at the time of fulfillment, ATU will notify you with a resolution regarding backorder status.
Please be advised that ATU ships from over 10 warehouses across the U.S. In some cases, items may be drop shipped to help speed up delivery times. On heavily discounted parts (i.e. differentials), tracking information may not be provided.
Our site is always available whenever you want to upgrade your ride. Orders can be placed 24/7/365.
Our passionate customer support team is happy to help with any questions or concerns.
Email: orders@allthingzutv.com
Phone: 256-686-4888
For returns, please use the link at the top of this page to access our return form. Download, print, and fill out the form completely, then ship it in the same box as the product you are returning.
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