The Down4Sound MM504 (Mini Maxx) is a compact full-range Class D 4-channel amplifier built for clean power and flexible tuning in a small footprint. It supports 2 OHM stereo and 4 OHM bridged operation, making it a great fit for space-saving multi-speaker installs.

Power Ratings (RMS)

• 50W x 4 @ 4 OHM
• 80W x 4 @ 2 OHM
• 160W x 2 bridged @ 4 OHM

Tuning & Specs

• Frequency Response: 10Hz – 23.7KHz
• High Pass: 20Hz – 800Hz (x1), 200Hz – 8KHz (x10)
• Low Pass: 50Hz – 800Hz (x1), 500Hz – 8KHz (x10)
• Input Sensitivity: 6V – 0.2V
• Signal-to-Noise Ratio: > 88dB
• THD @ 4 OHM: < 0.1%
• Working Voltage: 9V – 15.5V
• Fuse Rating: 25A

Dimensions

• 6.69 inch × 4.87 inch × 2.13 inch (170mm × 123.9mm × 54.3mm)

The MM504 is the right pick when you need full-range 4-channel power without sacrificing space.