The MDX400.4 amplifier delivers exceptional full-range multi-channel power in a highly compact, modern footprint. Engineered for versatile, high-output applications, this 4-channel mini amp provides 400 Watts RMS of clean, efficient power. It is the perfect solution for driving a complete setup of door speakers, bullet tweeters, and midrange pro audio drivers, offering crisp and clear sound quality across the entire frequency spectrum.
Designed to fit where traditional amplifiers simply cannot, the MDX400.4 features a heavy-duty cast aluminum heatsink for optimal thermal management. Its ultra-compact chassis makes it an absolute favorite for demanding custom systems—including motorcycles, ATVs, side-by-sides, and tight automotive applications—where high output and a minimal footprint are critical. With bridgeable outputs and variable crossovers, it offers the flexibility needed for almost any custom audio build.
- 4-Channel Class D full-range amplifier optimized for midrange speakers and tweeters
- 400 Watts RMS total power output (100W x 4 @ 2 Ohms)
- Ultra-compact mini design perfect for motorcycles and tight spaces
- Bridgeable architecture allows for 4-channel, 3-channel, or 2-channel operation
- Built-in variable High Pass (HPF) and Low Pass (LPF) crossovers
- RCA inputs for reliable signal transfer
- Multi-way protection circuitry with LED diagnostic indicators
- Channels: 4
- RMS Power @ 2 Ohm: 100W x 4
- RMS Power @ 4 Ohm: 65W x 4
- Bridged RMS Power @ 4 Ohm: 200W x 2
- Frequency Response: 10Hz – 25,000Hz
- S/N Ratio: >90dB
- Input Sensitivity: 0.2V – 6.0V
- High Pass Filter (HPF): 45Hz – 850Hz
- Low Pass Filter (LPF): 45Hz – 850Hz
- Operating Voltage: 9 – 16 Volts
- Fuse Rating: 40A Recommended
- Dimensions (LxWxH): 5.11" x 3.85" x 1.77"
- Weight: 1.50 lbs
