Rockford Fosgate TM400X2ad - Power Marine 400 Watt Class-ad 2-Channel Amplifier

Rockford FosgateSKU: TM400X2ad



The Power TM400X2ad 400 Watt 2-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.

Element Ready™ - Amps

These amplifiers are protected against Dust, UV, Corrosion, and feature Stainless hardware. These Moto-marine amplifiers have not only the capabilities you expect a Rockford Fosgate amp to have, but Rockford Fosgate have designed them to stand up to the environmental conditions you are likely to subject them to. With corrosion resistant stainless steel hardware and two-part epoxy coated circuit boards, these units are designed with you in mind. Whether on the lake, on the road or in the back woods these amplifiers are ready for an adventure.


Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.

CE Compliant

The ce mark is the official marking required by the European Community for all Electrical and Electronic equipment (and others) that will be sold, or put into service for the first time, anywhere in the European community. It proves to the authorities, but also to the buyer -or user- that this product fulfills all essential safety and environmental requirements as they are defined in the so-called European Directives. The ce marking directive (93/68/EEC) was adopted on 07-22-1993 and updated as 768/2008 EC on 13-8-2008. The directive gives a detailed description of the initials CE and any other marks specific to a particular directive and the many ways conformity may be acquired. In return for fulfilling the CE marking requirements, the manufacturer or its agent gets the permission to cover the entire European market using only one approval procedure for the topics covered in the applicable directives. No member state of the European Community can refuse trade of any (electronic or electrical) product that has been CE marked (unless fraud suspected). For some products however, national regulations exist, as long as the requirements covered in these national regulations are not covered by a pan-European Directive.

C.L.E.A.N. Set-Up

Patented circuit with in/out clip LEDs to help match a source to amp and optimize output. Time and sophisticated test equipment have been replaced, with Rockford’s integrated level setting technology called CLEAN (Calibrated Level Eliminates Audible Noise). Using simple LED indicators to identify both signal clipping from the audio source and the output level clipping to the speakers. This precise level set-up eliminates speaker damaging distortion.


3-Stage Airflow

3-stage airflow method effectively exhausts heat and ensures your amplifier runs cooler for optimum performance. Compact Rockford Fosgate Power BR and AD amplifiers generate a lot of wattage in a compact chassis. A natural by-product of generating this power is heat. To get rid of this heat, Rockford Fosgate engineers developed an efficient method to keep the amplifier running cool. This is accomplished by using a 3-stage thermal lock extrusion. It uses "dual fan forced induction" to pull in fresh air. It pulls heat off the MOSFETS and directs airflow into the exhaust channel. Then finally drives this heat out of the amplifier. Furthermore, the top heat sink is decoupled from the bottom, so the top remains cooler to the touch. SUMMARY When installing the amplifier, it's best to allow 2 to 3 inches minimum clearance around the fan intake and exhaust vents to optimize air-flow. As you can see, this method developed by Rockford Fosgate engineers, effectively exhausts heat and ensures your amplifier runs cooler for optimum performance.


DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature. DSM - An industry-leading manufacturing process, DSM utilizes high-speed robotics, high-quality 1% tight-tolerance parts and large board traces. The discrete components are laser etched to meet a particular value and a very low tolerance. This lower tolerance improves the efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature. These superior components are used by aerospace, automotive, and cellular manufacturers.

Rockford Fosgate Avatar

These Avatars are a personal signature from the Rockford Fosgate team member who designed and engineered this fanatic product. This statement illustrates the commitment to being Designed and Engineered in the U.S.A. 1 - an embodiment or personification, as of a principle, attitude, or view of life 2 - a graphical image that represents a person 3 - a symbol of ownership For every Rockford Fosgate product involved in the New Product Development cycle, team members have their Rockford Fosgate Avatar placed on the pc board. This avatar is their way of putting their personal signature on every piece produced to signify "I have done everything possible to ensure each customer receives the best possible product they could develop". Rockford Fosgate takes pride in knowing that their products are designed and engineered by Rockford Fosgate Fanatics in Tempe, AZ, USA. This is just a part of what makes a Rockford Fosgate customer a Fanatic for Life.

Class AD

This technology allows the amplifier to produce more power with less current draw from the vehicle's charging system. Rockford Fosgate's AD topology brings out high efficiency bd amplifier design to a full range application. Class AD uses our Dynamic Frequency Switching to increase the switching frequency during lower output levels for better signal resolution. This coupled with Post Choke Feedback Filtering compares the input signal to the output signal at the speaker connector removing any unwanted distortion. These technologies eliminate the inherent switching noise associated with typical class D designs and also provide instantaneous output power over varying impedance loads.

Constant Power

Constant Power is a patented circuit topology that provides instantaneous delivery of output power over varying impedance loads. Music and speakers have a dynamic relationship. As the frequency of music varies, so does the impedance of the speaker. Rockford Fosgate’s patented Constant Power circuit design actively monitors and increases voltage and current as the speaker’s impedance rises with music, resulting in up to a 25% increase in total amplifier power.


Number of Channels - 2
Amplifier Class - AD
Load Impedance Capability - 2 ohms
Power at 4 ohm - 400 W
Power at 2 ohm - 400 W
Frequency Response - 20 Hz - 20,000 Hz
Total Harmonic Distortion - 1 % THD
Additional Information:
• Differential inputs with high level auto turn-on feature
• Remote-Out feature when using high level inputs
• C.L.E.A.N. input/output clip detection and indicator LEDs
• Top mounted controls
• Dual fan cooled
• Real time thermal sensing
• Dual extruded heat sinks
• Discrete surface mount technology
• Marine grade two part epoxy coating on circuit boards

RCA Inputs - Yes
Speaker Level Inputs - Yes
Highpass - Yes
Lowpass - Yes
Cutoff Frequencies for (HP/LP):
• High-Pass: 50Hz - 250Hz @ 12dB/Octave
• Low-Pass: 50Hz - 250Hz @ 12dB/Octave

Width - 7 inch(es) / 17.78 cm
Height - 4.3 inch(es) / 10.92 cm
Depth - 1.6 inch(es) / 4.06 cm

Weight - 2.91 lb(s) / 1.32 kg

2 Years. Standard warranty


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