Soundigital 400.4 XP – 4-Channel Amplifier, 4Ω
Soundigital 400.4 XP – 4-Channel Amplifier, 4Ω
SounDigital 400.4 XP — Ultra-Compact 4-Channel Amplifier
The SounDigital 400.4 XP is the smallest amp in the XP 4-channel family and the perfect entry point for a cleaner, louder speaker system. At just 4.7" x 4.4", it delivers up to 100 watts RMS per channel and hides in the tightest of spaces — a favorite for baggers, slingshots, side-by-sides, and boats running a straightforward front-and-rear speaker upgrade.
Why we recommend it
Run all four channels to your speakers or bridge to two channels for more output where you need it. It's an efficient, great-sounding way to move beyond factory power without a big install or a big electrical draw — and it plays nicely with the harnesses and processors we use on every build.
Fitment & install notes
Ideal for Harley baggers and touring bikes, Polaris Slingshots, Can-Am / UTV side-by-sides, and marine and boat systems. Not sure it's enough power for your goals? Message us and we'll help you choose.
SounDigital 400.4 XP — 4Ω Specifications
- Power @ 12.6V @ 4Ω: 4 x 66W RMS
- Power @ 12.6V @ 2Ω: 4 x 100W RMS
- Bridged @ 4Ω: 2 x 200W RMS
- Frequency Response (-3dB): 5Hz – 36kHz
- Dimensions: 4.7 x 4.4 x 2.0 in