Sony
Sony XMS-400D Ultra-Compact 4-Channel Class D Amplifier – 400W, High/Low-Level Inputs, Clean OEM Upgrade
Sony XMS-400D Ultra-Compact 4-Channel Class D Amplifier – 400W, High/Low-Level Inputs, Clean OEM Upgrade
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Sony XMS-400D – Ultra-Compact 4-Channel Class D Amplifier (400W)
The Sony XMS-400D is one of the most compact, clean, and efficient 4-channel amplifiers on the market—perfect for OEM upgrades, motorcycles, UTVs, boats, or any vehicle where space is tight but sound quality matters. Despite its tiny footprint, this amp delivers up to 400 watts of clean Class-D power, giving your speakers the clarity, volume, and headroom factory systems can’t provide.
At just a fraction of the size of traditional amps, the XMS-400D can mount behind the dash, under a seat, inside a fairing, or nearly anywhere you can fit a paperback book. High-level inputs allow direct connection to factory radios without needing a line output converter, while low-level RCA inputs make it a drop-in match for aftermarket stereos.
A built-in LPF (low-pass filter) and HPF (high-pass filter) help protect your speakers and fine-tune your system. The amplifier’s Class-D design keeps heat low and efficiency high, ensuring stable performance even during long play sessions.
Key Features – Sony XMS-400D
- Ultra-compact 4-channel amplifier – perfect for tight space installs
- 400W max output
- 45W RMS × 4 @ 4Ω – clean power for aftermarket or factory speakers
- Class-D design – cooler operation, smaller size, higher efficiency
- High-level & low-level inputs – works with OEM and aftermarket radios
- Selectable High-Pass / Low-Pass filters
- Compact metal chassis – durable and vibration-resistant
- Easy installation in boats, cars, UTVs, motorcycles, and powersports vehicles
Technical Specifications – Sony XMS-400D
| Amplifier Type | 4-channel Class-D |
| Max Power Output | 400W total |
| RMS Power | 45W × 4 @ 4Ω |
| Input Types | High-level (speaker-level) & RCA low-level |
| Filters | HPF / LPF selectable |
| Chassis Size | Ultra-compact (fits behind dash) |
| Ideal Speaker Setup | 4 door speakers or 2 speakers + sub (passive) |
Ideal For
- OEM system upgrades
- Motorcycles
- UTVs & side-by-sides
- Boats & marine audio
- Compact vehicles with limited space
- Replacing factory power with cleaner output
What’s in the Box
- Sony XMS-400D amplifier
- Wiring harness
- Mounting hardware
- Documentation / warranty
Why Buy From MCOR Automotive
- Authorized Sony e-commerce retailer
- Fast nationwide delivery through fulfillment center locations
- 20+ years of automotive and powersports installation experience
- Support from real 12-volt technicians
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