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Rockford Fosgate Power T400X4ad Compact 4-channel Car Amplifier * 100 Watts RMS X 4

Rockford Fosgate Power T400X4ad Compact 4-channel Car Amplifier * 100 Watts RMS X 4


SKU: T400X4ad
Product by: Rockford

Rockford Fosgate amps have been a staple in the car audio industry for almost 50 years! Rockford has the amp that you need regardless of your budget. Prime, Punch and Power Series amps ranging from 250 watt up to 2500 watts RMS of pure clean power!

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SKU: T400X4ad


sku: T400X4ad

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Key Features:

    • 4-channel car amplifier
    • 100 watts RMS x 4 at 2 to 4 ohms
    • 200 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode)
    • CEA-2006 compliant
    • Class AD amplifier design
    • Constant Power technology maintains full output power despite impedance changes
    • C.L.E.A.N. gain setup system includes clip lights and link to Rockford Fosgate’s setup tones
    • differential input circuitry helps eliminate hum
    • dual-fan forced induction cooling
    • variable high- and low-pass filters (50-250 Hz, 12 dB/octave)
    • variable Punch EQ (bass/treble boost: 0-18 dB at 45 Hz, 0-14 dB at 12,500 Hz)
    More Info:
    • preamp and speaker-level inputs (quick-connect input harnesses included)
    • signal-sensing turn-on with speaker-level inputs eliminates need for remote turn-on lead
    • 8-gauge power and ground leads and a 60-amp fuse recommended — wiring and hardware not included with amplifier
    • no onboard fuses — when installing multiple amps in a system, an additional 60-amp in-line fuse between the distribution block and the amplifier is recommended
    • 8-5/8″W x 1-5/8″H x 4-5/16″D
    • warranty: 2 years


Features & specs


RMS Power Output (Watts x Channels) 100 x 4
Peak Power Output (Watts x Channels) 290 x 2
Power at 2 Ohms (Watts x Channels) 100 x 4
Bridged Power (Watts x Channels) 200 x 2
Minimum Impedance Bridged 4
Minimum Impedance Unbridged 2
Minimum Impedance 2
Best Frequency Response 20-20000 Hz
THD at Rated RMS Power 1%
Signal to Noise Ratio 90 dB
Input Voltage 14.4v
Amplifier Class A/D
Low-Pass Crossover Frequency 50-250 Hz
Low-Pass Slope (dB/octave) 12 dB/octave
High-Pass Crossover Frequency 50-250 Hz
High-Pass Slope (dB/octave) 12 dB/octave
Bass Boost 0-18 dB
Bass Boost Frequency 45 Hz
Fan Cooled Yes
Fuse Rating 60
Speaker Level Inputs 4 RCA
Preamp Outputs No
Width (inches) 8-5/8
Height (inches) 1-5/8
Depth (inches) 4-5/16
Parts Warranty 2 Years
Labor Warranty 2 Years


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Additional information

Amplifier Class

Bass Knob

Sold Separate



4 Channel

Minimum Impedance (ohms)

2 Ohms

Compact Design

Power: RMS Per Channel