



DS18 MP.4A 4-Channel Full-Range Class D IP55 Marine & Powersports Amplifier — 4 x 40W RMS @ 4-Ohm
Free shipping on orders over $100
Continental US · processed within 1–2 business days
Store-credit returns
New, uninstalled items in original packaging
In stock! Ships within 2 business days.
Award Winning Sound
2-Year Limited Warranty
Variety of Payment Options
Product Overview
Description
Product Overview
DS18 MP.4A
In the rugged world of motorsports, where water, dust, and vibrations relentlessly test your audio gear, the MP.4A stands strong. Encased in a striking brushed red aluminum body, it's not only stylish but also exceptionally durable. The MP.4A is designed to brave the elements with its IP55 waterproofing, ensuring your music never falters, whether you're embarking on a dusty off-road adventure or a serene seaside drive. And for added protection, we've fortified the MP.4A with Salt & Fog Protection.
Connecting your audio source is a breeze, thanks to the 3.5mm jack input audio connector and RCA left and right audio outputs. These features allow you to seamlessly link other amps to it or integrate it into your current system. Every note and beat are faithfully reproduced, thanks to a raw MAX Power of 480W, delivering an exhilarating audio experience. The continuous power output of 4 x 40W RMS ensures unmatched clarity and precision in your sound, with a frequency response spanning from 20Hz to 20KHz and a signal-to-noise ratio of 82dB, making every note crisp and every beat pronounced.
Installation is a breeze, thanks to the MP.4A's power direct harness design, eliminating unnecessary complexity while maximizing performance. What sets the MP.4A apart is not just its performance but also its compact size. It's so small that it can fit almost anywhere in your setup. It also incorporates surface mount component technology, ensuring reliability and longevity even in the harshest conditions. No need for complicated adjustments; it arrives ready to pump out your favorite tunes with crystal-clear precision, allowing you to fully immerse yourself in the music.
Perfect for Golf Carts!
Rule the Water
King of the COVE
Free shipping on orders $100+
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
FAQs
Please read our FAQs page to find out more.
RMS vs. MAX power — which number do I actually care about?
RMS is what your gear handles continuously; MAX is the short burst it can survive without complaint. Match your amplifier's RMS output to your speakers' RMS rating — sizing off the MAX number is how magic smoke gets released.
What does the IP65 rating on DS18 marine gear actually mean?
It's dust-tight and rated against low-pressure water jets from any direction — built for spray, rain, and the occasional wave over the bow, not for full submersion. If something's going somewhere it could sit underwater, that's a different conversation entirely.
How do I match an amplifier to my speakers without guessing?
Add up the RMS rating of everything the amp will power, and pick an amp whose RMS output (at your speakers' impedance — usually 4-ohm) lands close to that total. Undersized is thin sound; wildly oversized is a fast way to blow a voice coil.
Can I mix marine-grade gear into a standard car audio setup, or the reverse?
You can run marine-grade gear in a car — it's just over-built for that environment, no downside besides cost. Running non-weatherproof car audio gear in an open UTV or boat is the direction that causes problems.
What gauge wiring kit do I need?
It scales with your amp's power draw and the length of the run — DS18's OFC kits come in 4-gauge and 8-gauge for a reason. Undersized wiring on a high-draw system is a voltage-drop and heat problem waiting to happen; when in doubt, size up.

