PRV Audio MDX400.4 2 Ohm Mini 4-Channel Car Amplifier – 400W RMS, Compact 4x100W, Bridgable 2x200W

Compact power for multi-speaker setups

The PRV Audio MDX400.4 is a four-channel car amplifier delivering 400 Watts RMS across all channels at 2 Ohms, with a flexible 2 Ohm / 4 Ohm configuration. Engineered for efficiency, it provides robust audio performance while aiming to minimize strain on your vehicle’s electrical system.

Built to fit in tight spaces, this compact unit features a small heatsink and a modern design that suits dashboards, under-seat compartments, or specialty builds for motorcycles and ATV style rides. Despite its miniature footprint, the MDX400.4 preserves clear highs, punchy midbass, and stable overall sound across a range of listening styles.

Key specifications at a glance

• 4 x 100 Watts RMS at 2 Ohms (TRUE RMS, full range)
• 4 x 70 Watts RMS at 4 Ohms
• Bridgeable to 2 x 200 Watts RMS at 4 Ohms per bridged channel
• Compact dimensions: 4.25" W × 3.50" L × 1.95" H
• Digital Class D with surface mount components for reduced vibration and efficient cooling

This proprietary heat-dissipation design helps keep temperatures in check during demanding playlists, so you can enjoy extended sessions without noticeable thermal throttling.

Designed for versatile installations

• Multichannel output supports wiring multiple speakers with per-channel power distribution
• 8 AWG power inputs and 14 AWG speaker outputs for sturdy, reliable connections
• Ideal for compact projects in cars, motorcycles, ATVs, slingshots, and other sport vehicles

In real-world scenarios, the MDX400.4 offers a practical balance of size, power, and efficiency. Expect refined midrange punch, crisp highs, and controlled bass behavior across a variety of setups, from compact dashboards to custom builds. While performance varies with speaker pairing and vehicle electrical health, this amp is designed to be a capable upgrade for enthusiasts seeking more scaleable sound from a small package.

What you gain with the MDX400.4

Users can explore enhanced multi-speaker arrangements, easier mounting in constrained spaces, and solid, dependable power delivery without heavy electrical draw. The design aims to support sound quality improvements and flexibility for personal configurations, rather than promising fixed outcomes.