Rockford Fosgate TM400X4ad Power Marine 400 Watt Class-ad 4-Channel Amplifier

High-Power Compact Amplifier

The Rockford Fosgate TM400X4AD delivers an impressive 400 watts of total power in a compact housing measuring only 1.6” x 4.3” x 8.3”. Engineered with proprietary Constant Power technology, it produces up to 25% more power across all impedance loads, ensuring consistent, high-quality performance whether wired at 4 ohm, 2 ohm, or bridged.

Marine-Ready Durability

Designed for motorsport and marine applications, the TM400X4AD features Element Ready construction to resist dust, UV rays, and corrosion. Its conformal-coated circuit board, dual fan cooling system, and 3-stage thermal lock extrusion provide long-lasting reliability, even in the toughest environments on the water or trail.

Advanced Features & Flexibility

With both high-level and low-level inputs, this amplifier integrates seamlessly with factory or aftermarket systems. Onboard controls include a Punch EQ with +18dB boost at 45Hz, a 12dB/octave Butterworth crossover, and Rockford’s C.L.E.A.N. clip detection system for distortion-free sound. Flexible installation options and easy-access top-mounted controls make tuning simple.

Key Highlights

• Ultra-compact 400W 4-channel Class-AD marine/motorsport amplifier

• Proprietary Constant Power technology delivers up to 25% more power

• Power ratings: 100W x 4 @ 4Ω, 100W x 4 @ 2Ω, 200W x 2 @ 4Ω bridged

• Element Ready design protects against dust, UV, and corrosion

• Conformal coated PCB ensures durability in marine environments

• Onboard Punch EQ with +18dB boost at 45Hz

• 12dB/octave Butterworth crossover for precise tuning

• C.L.E.A.N. input/output clip detection LEDs prevent distortion

• Dual fan cooling system with 3-stage thermal lock extrusion

• Flexible integration with speaker-level and RCA inputs

• Top-mounted controls for easy adjustment

• Famous Rockford Fosgate build quality with 2-year warranty

Package Contains

• Rockford Fosgate TM400X4AD 4-channel amplifier

• Mounting hardware

• Power/ground/speaker terminal block connectors

• Owner’s manual & installation guide

• Rockford Fosgate 2-year warranty documentation