Rockford Fosgate Power Marine TM400X4ad 4-Channel Amplifier

Element Ready™ All-Weather Architecture:

Modern marine vessels, UTVs, and motorcycles present a hostile operational environment that quickly destroys standard car audio equipment. The TMX4004ad addresses this with Rockford Fosgate's Element Ready™ engineering, built from the ground up to repel water spray, trail dust, salt corrosion, and intense UV exposure. The internal circuitry is shielded by a marine-grade, two-part epoxy coating, while all external hardware and terminal connectors are crafted from corrosion-resistant materials. This robust barrier guarantees flawless electrical conductivity and enduring performance, whether the amplifier is mounted inside a boat hull, a side-by-side dashboard, or a motorcycle fairing.

Proprietary Class-AD & Constant Power Topology:

Achieving high-power output in powersports applications is typically limited by compact batteries and low-current charging systems. To break through this limitation, the TMX4004ad relies on Rockford's proprietary Class-AD amplifier topology, combining the audiophile fidelity of a traditional Class-A circuit with the ultra-high electrical efficiency of Class-D. This architecture features Constant Power technology, a smart monitoring system that automatically detects changing speaker impedances and actively shifts power output to remain consistent. The amplifier delivers a relentless 100 Watts x 4 RMS whether running a 4-Ohm or 2-Ohm speaker load, maximizing your audio performance without draining your electrical system.

Patented C.L.E.A.N. Gain Calibration:

Improperly tuned gain controls are the number one cause of speaker failure and distorted sound, but setting them precisely usually requires expensive oscilloscopes. The TMX4004ad eliminates the guesswork with an onboard, patented C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) setup wizard. Featuring integrated multi-color input and output clipping LEDs, this diagnostic tool monitors the signal coming from your head unit and passing through the amplifier. By illuminating red at the precise point of source clipping and shifting color (Blue to Violet to Red) on output, it allows you to instantly dial in the absolute perfect gain structure for crystal-clear, distortion-free volume.

Multi-Stage Forced Induction Cooling:

Packing a true 400-watt RMS powerhouse into a chassis smaller than a hardcover book creates a massive thermal challenge, especially when crammed inside dense motorcycle fairings. Rockford Fosgate counters this with an advanced 3-stage forced induction cooling network. Driven by dual internal micro-fans, the system actively pulls fresh, cool air across the internal MOSFET transistors and pushes hot air out through dedicated exhaust ports. The top and bottom aluminum heatsinks are structurally decoupled, which isolates extreme internal heat and allows the external casing to remain remarkably cool to the touch during grueling, all-day rides.

Product Highlights:

General Features:

Installation & Control:

Technical Specifications:

What’s in the Box: