Power 400 Watt Class-ad 4-Channel Amplifier T400X4ad
The Power T400X4ad is an ultra-compact, high efficiency 400 Watt 4-channel amplifier. Features multi-impedance Constant Power, input/output clip detection, top mounted controls and dual fan forced induction cooling. Perfect for hybrid, electric, small cars, trucks, motorcycles, and side-by-side UTVs.
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The Power T400X4ad 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
- 4/2 Ohm muti-impedance Constant Power
- Differential inputs with high level auto turn-on feature
- 8 AWG power/ground connector w/ upgraded RCA connectors
- Remote-Out feature when using high level inputs
- 2/4 channel input switch
- 4 Ohm bridged capable
- 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
- 2-Year Warranty
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's ...Learn more
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.
This product fulfills all essential safety and environmental requirements as defined in the European Directives (768/2008 ...Learn more
This product fulfills all essential safety and environmental requirements as defined in the European Directives (768/2008 EC).
This technology allows the amplifier to produce more power with less current draw from the vehicle's ...Learn more
This technology allows the amplifier to produce more power with less current draw from the vehicle's charging system.
Constant Power is a patented circuit topology that provides instantaneous delivery of output power over varying ...Learn more
Constant Power is a patented circuit topology that provides instantaneous delivery of output power over varying impedance loads.
C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) is a patented circuit with in/out clip LEDs to help ...Learn more
C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) is a patented circuit with in/out clip LEDs to help match a source to amp and optimize output.
3-stage airflow method effectively exhausts heat and ensures your amplifier runs cooler for optimum performance.Learn more
3-stage airflow method 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 ...Learn more
DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.
These Avatars are a personal signature from the Rockford Fosgate team member(s) who designed and engineered ...Learn more
Engineered In The USA
These Avatars are a personal signature from the Rockford Fosgate team member(s) who designed and engineered this fanatic product. This statement illustrates our commitment to being Designed and Engineered in the U.S.A.
100W x 4 @ 4Ω
(Sum of Rated Power)
(RMS Continuous Power)
100 Watts x 4 @ 2-Ohm
200 Watts x 2 @ 4-Ohm Bridged
152 Watts x 4 @ 2-Ohm
290 Watts x 2 @ 4-Ohm Bridged
Front Terminals: Left (+) Right (-)
Rear Terminals: Left (+) Right (-)
Rear High/Low Level Input: 4-Pin harness
Bass: 0 to +18 dB @ 45 Hz
Low-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth
Protect: Red LED
Input Clip: Red LED3
Output Clip: Blue/Violet/Red LED1,2,3
LED Color Legend:
1BLUE: <0.5% THD
2VIOLET: 1% THD
3RED: 10%+ THD
Rear: 4-Pin Harness
4.1 x 10.8 x 21.1 (cm)
Knowledge Base Articles
- 2016 Power compact amplifiers - owner's manual
- 2014+ Harley-Davidson® Radio Flash - Installation Advisory
- Radio Reception On Motorcycles Using Class-D Amps - Installation Advisory
- 2014 Power compact amplifiers - owner's manual
Ask Our Experts
Contact the Authorized Rockford Fosgate Dealer you purchased this product from. If you need further assistance, call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.
ARE YOU ENGINEERED TO ROCK?
Get a 1-Year extended amplifier warranty when using a matching Rockford Fosgate installation kit.
We want you to get the maximum performance and reliability from your Rockford Fosgate amplifier. We're so certain using the right cables make a difference, we'll give you and additional 1-Year amplifier warranty when using a matching installation kit!
- 1 Purchase a Rockford Fosgate Punch or Power amplifier.
- 2 Add the correct amplifier installation kit.
- 3 Get an additional 1 year amplifier warranty FREE!
Best Amp Ever!!
I upgraded from a P400X4 to my new T400X4ad and I am THRILLED with the sound quality, output, and overall performance.
I have 2 of these bad boys on my Harley and they are destroying everything that I hook up to them.... I LOVE THESE!
I have my T400X4ad powering 2 pairs of 2652-S in my 2009 Honda Fit. The amp was small enough to fit under the passenger seat, and the performance is UNREAL. The setup is very simple and easy to do, and the sound quality surpasses many other amps I have had, including previous Rockfords. It was PERFECT for my application!
I have this T400X4ad powering 4 Focal speakers and tweeters. Man, my truck is a concert on wheels with the sound quality crisp clean. Love how it has the built-in clipping indicator.
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