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Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 in the contiguous US. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
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The DOWN4SOUND MM1604 Mini Maxx is a compact 4 channel full range Class D car audio amplifier built for clean installs and efficient power delivery. Rated at 600W RMS, it is designed to drive mids and highs with authority, run active speaker setups, or bridge channels when you need more output from a compact platform.
Key Features
- 600W RMS rated output
- 4 channel full range Class D amplifier
- Bridgeable channels for flexible system design
- Adjustable crossovers for precise tuning
- High efficiency design for reduced heat
- 4 way protection circuit for reliable operation
- Input sensitivity 0.2V to 6V
- Operating voltage 9V to 15.5V
Power Output
- 4 × 160W RMS at 4 ohms
- 4 × 220W RMS at 2 ohms
- 2 × 455W RMS at 4 ohms bridged
Tuning Controls
- Full range frequency response 10Hz to 24.8kHz
- High pass filter 20Hz to 800Hz
- Low pass filter 50Hz to 800Hz
- Selectable x1 or x10 multiplier
- Band pass capable using onboard crossover controls
Dimensions
- 9.84 inches × 4.87 inches × 2.13 inches
Protection and Reliability
- Thermal protection
- Short circuit protection
- Voltage protection
- DC overload protection
Technical Specifications
- Channels 4
- Amplifier class Full range Class D
- Frequency response 10Hz to 24.8kHz
- Input sensitivity 0.2V to 6V
- Signal to noise ratio greater than 98dB
- Total harmonic distortion less than 0.1 percent
- Operating voltage 9V to 15.5V
- Fuse rating 80A
Why Choose the MM1604 Mini Maxx
- Compact mini amplifier footprint
- Strong multi channel output for mids and highs
- Bridgeable flexibility for system expansion
- Wide tuning capability for clean installs
Add the MM1604 Mini Maxx to your system and get clean controlled power with a finish that complements the build.
Authorized Down4Sound dealer at JS Ultimate Sounds. Free shipping on orders $99+.

