Rockford FosgateT400X4AD 400W RMS Compact 4-Channel Class AD Amplifier

Super-compact, bursting with power

Rockford Fosgate's Power Series T400X4ad 4-channel amplifier can send up to 100 watts RMS to four separate speakers, or you could use this tiny powerpack to run a couple of subs with 200 watts each. A dual-fan forced air cooling system keeps this sturdy little amp from overheating, so it can play hard for a long time.

Class AD: accurate and powerful

Rockford Fosgate uses their proprietary Class AD amplifier technology, combining the high fidelity of a Class A system with the high efficiency of their special Class D technology, to bring you this ultra-efficient, high-output amplifier. In other words, this compact amp produces more power with less current draw from your vehicle's charging system than most other amps on the road today.

Rockford Fosgate's high-tech solutions yield more power

Power Series amplifiers actively monitor speaker performance using Rockford Fosgate's Constant Power technology. A speaker's impedance naturally fluctuates as it performs, fighting against your amp's output. So, just like your cruise control increases the engine's RPM to maintain your car's speed uphill, Constant Power maintains this amp's output by increasing its internal voltage and current flow when the speaker's impedance rises. This results in up to a 25% increase in the amp's total power output.

T400X4ab control panel with clip lights

Easy to set for optimum performance

Rockford Fosgate's C.L.E.A.N. technology (Calibrated Level Eliminates Audible Noise) setup system ensures your music will sound as clean and powerful as possible. It works like this: play the setup tone on the included test CD, adjust the receiver volume until a red clip light on the amp goes out, then turn the amp gain up until a blue light comes on. It's that simple — your amplifier will be perfectly set to match your receiver's output. When your receiver reaches maximum clean volume, you'll get maximum clean power from your Power amp. At quiet listening levels, you'll hear less background noise and more of your music.

Clip lights

If that blue light turns solid red while you're playing music, the amp's telling you that your source is distorting and you should turn it down, or risk damage to your gear. The optional PLC2 remote level control also doubles as a clip indicator, so you can see from the front seat if your music's clipping.

Product Features:

• Number of Channels: 4
• Rated Power(RMS Continuous Power):
• 100 Watts x 4 @ 4-Ohms
• 100 Watts x 4 @ 2-Ohms
• 200 Watts x 2 @ 4-Ohms Bridged
• Total Power (Sum of Rated Power): 400 Watts RMS
• Dynamic Power (PVC/PowerCube® Measurement)
• 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 (-)
• Crossover Controls:
• High-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth  
• Low-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth  
• All-Pass: Yes
• Tone Controls:
• Front Channels - Punch EQ
• Treble: 0dB to +12dB @ 12kHz
• Bass: 0dB to +18dB @ 45Hz
• Rear Channels - Punch EQ
• Treble: 0dB to +14dB @ 12.5kHz
• Bass: 0dB to +18dB @ 45Hz
• Signal Input:
• Front Low level: Front High/Low Level Input: 4-Pin harness
• Rear Low level: Rear High/Low Level Input: 4-Pin harness
• Signal Output: N/A
• Power Input Connector: Detachable Compression Terminal
• Power Wire Gauge: 10 AWG
• Speaker Output Connector:
• Front: 4-Pin Harness
• Rear: 4-Pin Harness
• Speaker Wire Gauge: 16 AWG
• Heat Sink Type: Extruded Aluminum
• Cooling: Dual Fan Cooled
• Remote Controls:
• Visual Indicators:
• Power: Blue LED  
• Protect: Red LED  
• Input Clip: Red LED 
• Output Clip Blue/Red LED
• Circuit Topology Class: Class A/B
• Frequency Response: 20Hz to 20kHz +/- 1dB
• Dimensions (HxWxL):
• 1.6 x 4.25 x 8.3 (in)
• 4.1 x 10.79 x 21.1 (cm)
• Optional PLC2 wired remote level control with clip light available
• UK Authorised on-line retailers
• 1-year warranty

What's in the box: