![ROCKFORD FOSGATE Power 400 Watt Class-ad 4-Channel Amplifier](http://shopaudiodesign.com/cdn/shop/products/T400X4ad_{width}x.jpg?v=1540514595)
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ROCKFORD FOSGATE
ROCKFORD FOSGATE Power 400 Watt Class-ad 4-Channel Amplifier
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.
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
![CEA-2006 Compliant](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/glossary/.thumbnails/CEA-2006_520x300.png/CEA-2006_520x300-0x500.png)
CEA-2006 Compliant
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.
![Class AD](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/glossary/.thumbnails/tech_class_ad.png/tech_class_ad-0x500.png)
Class AD
This technology allows the amplifier to produce more power with less current draw from the vehicle's charging system.
![CE Compliant](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/glossary/.thumbnails/CE_logo_520x300.png/CE_logo_520x300-0x500.png)
CE Compliant
This product fulfills all essential safety and environmental requirements as defined in the European Directives (768/2008 EC).
![C.L.E.A.N. Set-Up](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/glossary/.thumbnails/CLEAN_520x300.png/CLEAN_520x300-0x500.png)
C.L.E.A.N. Set-Up
Patented circuit with in/out clip LEDs to help match a source to amp and optimize output.
![Constant Power](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/technology/.thumbnails/tech_constant_power.png/tech_constant_power-0x500.png)
Constant Power
Constant Power is a patented circuit topology that provides instantaneous delivery of output power over varying impedance loads.
![3-Stage Airflow](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/glossary/.thumbnails/3-StageAirflow_technology_lg.png/3-StageAirflow_technology_lg-0x500.png)
3-Stage Airflow
3-stage airflow method effectively exhausts heat and ensures your amplifier runs cooler for optimum performance.
![DSM](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/glossary/.thumbnails/icon_DSM.jpg/icon_DSM-0x500.jpg)
DSM
DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.
![Engineered In The USA](https://www.rockfordfosgate.com/static/media/synced_glossary_items/images/glossary/.thumbnails/icon_avatar.jpg/icon_avatar-0x500.jpg)
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.
![CEA-2006 Guidelines](https://www.rockfordfosgate.com/static/images/icons/cea-2006_icon.gif)
100W x 4 @ 4Ω
≤1.0% THD+N
(Sum of Rated Power)
(RMS Continuous Power)
100 Watts x 4 @ 2-Ohm
200 Watts x 2 @ 4-Ohm Bridged
(PVC/PowerCube®)
152 Watts x 4 @ 2-Ohm
290 Watts x 2 @ 4-Ohm Bridged
Front Terminals: Left (+) Right (-)
Rear Terminals: Left (+) Right (-)
2-Ohm: <1.0%
Rear High/Low Level Input: 4-Pin harness
Bass: 0 to +18 dB @ 45 Hz
Low-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth
All-Pass: Yes
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
(not included)
![](https://www.rockfordfosgate.com/images/products/dimensions/T400X4AD_dimensions.png)
4.1 x 10.8 x 21.1 (cm)