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Rockford Fosgate

T400X4AD

Rockford Fosgate T400X4AD 4 Channel Amplifier

This is the Rockford Fosgate T400X4AD 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
CEA-2006 Power Rating
100W x 4 @ 4Ω
≤1.0% THD+N
Number of Channels
4
Total Power 
(Sum of Rated Power)
400 Watts
Rated Power 
(RMS Continuous Power)
100 Watts x 4 @ 4-Ohm 
100 Watts x 4 @ 2-Ohm 
200 Watts x 2 @ 4-Ohm Bridged
Dynamic Power 
(PVC/PowerCube®)
128 Watts x 4 @ 4-Ohm 
152 Watts x 4 @ 2-Ohm 
290 Watts x 2 @ 4-Ohm Bridged
Bridgeable
Yes 
Front Terminals: Left (+) Right (-) 
Rear Terminals: Left (+) Right (-)
Frequency Response
20Hz-20kHz +/-1dB
Input Sensitivity
150 mV to 12 V
Circuit Topology Class
Class AD
Efficiency (average)
>75%
Total Harmonic Distortion (THD+Noise)
4-Ohm: <1.0% 
2-Ohm: <1.0%
Signal Input
Front High/Low Level Input: 4-Pin harness 
Rear High/Low Level Input: 4-Pin harness
Signal Output
Tone Controls
Treble: 0 to +14 dB @ 12.5 kHz 
Bass: 0 to +18 dB @ 45 Hz
Crossover Controls
High-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth 
Low-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth 
All-Pass: Yes
Remote Controls
Visual Indicators
Power: Blue LED 
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
Power Wire Gauge
8 AWG
Power Input Connector
Detachable Compression Terminal
Speaker Wire Gauge
16 AWG
Speaker Output Connector
Front: 4-Pin Harness 
Rear: 4-Pin Harness
Cooling
Dual Fan Cooled
Heatsink
Operating Voltage
9 - 16 VDC
Recommended Fuse 
(not included)
60 A
Average Current Draw (13.8V Music)
28 A
Max. Current Draw (13.8V Sinewave)
55 A
Suggested Alternator
75 A
Dimensional Diagram
Dimensions (H x W x D)
1.6 x 4.3 x 8.3 (in.) 
4.1 x 10.8 x 21.1 (cm)
Shipping Weight
3.4 Lbs. (1.54 Kg.)