Skip to product information
1 of 8

Rockford Fosgate

Power Marine 400 Watt Class-ad 4-Channel Amplifier

Power Marine 400 Watt Class-ad 4-Channel Amplifier

Regular price $569.99
Regular price Sale price $569.99
Sale Sold out
Shipping calculated at checkout.

The TM400X4ad is a 400 Watt 4-channel amplifier with high efficiency Class-ad technology and a conformal coated pc board designed for motorsport and marine applications.

The Power TM400X4ad 400 Watt 4-channel ultra-compact, amplifier is built on Rockford Fosgate’s proprietary Class-AD technology, featuring Constant Power to produce the same output at both 4-Ohm and 2-Ohm impedances. Flexible vehicle integration enabled through low-level and high-level inputs with auto turn-on. Top mounted controls allow easy access to built-in crossover and C.L.E.A.N. input/output clip detection circuits. The 3-stage thermal lock extrusion with dual fan forced induction keeps everything cool while real-time thermal/protection schemes safeguard the amplifier.


  • Rockford Fosgate proprietary Class AD technology

  • 8 AWG power/ground connector w/ upgraded RCA connectors

  • Differential inputs with high level auto turn-on feature

  • Remote-Out feature when using high level inputs

  • 4/2 Ohm muti-impedance Constant Power

  • 2/4 channel input switch

  • Top mounted controls

  • C.L.E.A.N. input/output clip detection and indicator LEDs

  • 4 Ohm bridged capable

  • Dual fan cooled

  • Real time thermal sensing

  • Dual extruded heat sinks

  • Discrete surface mount technology

  • Marine grade two part epoxy coating on circuit boards

  • 2-Year Warranty

CE Compliant
This product fulfills all essential safety and environmental requirements as defined in the European Directives (768/2008 ...

CTA-2006 Compliant
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's ...

This technology allows the amplifier to produce more power with less current draw from the vehicle's ...

Constant Power
Constant Power is a patented circuit topology that provides instantaneous delivery of output power over varying ...

C.L.E.A.N. Set-Up
C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) is a patented circuit with in/out clip LEDs to help ...

Element Ready™ | Amps
All components are protected against harsh outdoor elements like Dust, UV, Temperature, Water, Corrosion & Vibration.

3-Stage Airflow
3-stage airflow method effectively exhausts heat and ensures your amplifier runs cooler for optimum performance.

Engineered In The USA
These Avatars are a personal signature from the Rockford Fosgate team member(s) who designed and engineered ...

DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and ...

View full details