The Rockford Fosgate Power T400X4ad is an ultra-compact 4-channel amplifier that delivers impressive power in a remarkably small footprint. This versatile amplifier can provide up to 100 watts RMS per channel to four separate speakers, or it can be bridged to deliver 200 watts RMS to each of two channels—perfect for powering component speakers or subwoofers.
Despite its compact size (just 8-5/8″ × 4-5/16″), this amplifier incorporates Rockford Fosgate’s proprietary Class AD technology, combining the high fidelity of Class A with the high efficiency of their special Class D design. This ultra-efficient amp produces more power with less current draw from your vehicle’s charging system than most comparable amplifiers.
The T400X4ad features Rockford’s Constant Power technology, which actively monitors speaker performance and increases internal voltage and current flow when speaker impedance rises. This results in up to 25% more total power output. A dual-fan forced air cooling system prevents overheating, enabling sustained high-output performance even in challenging conditions.
Product Highlights
- 4-channel car amplifier in an ultra-compact chassis
- Power output:
- 100 watts RMS × 4 at 2 to 4 ohms
- 200 watts RMS × 2 bridged at 4 ohms
- Class AD amplifier design for higher efficiency
- Constant Power technology maintains full output despite impedance changes
- C.L.E.A.N. gain setup system with clip indicators
- Dual-fan forced induction cooling system
- Variable high- and low-pass filters (50-250 Hz, 12 dB/octave)
- Punch EQ bass/treble boost (0-18 dB at 45 Hz, 0-14 dB at 12,500 Hz)
Package Contents
- T400X4ad 4-channel amplifier
- Two 14″ input harnesses (4-pin Molex connector to 2 female RCAs)
- Two 8″ speaker output harnesses (4-pin Molex connector to bare wire)
- Amplifier Quick Setup sheet
- Certificate of Performance Verification
