





Rockford Fosgate Power T400-4
Power Series 400W 4-Channel Car Amplifier
Enjoy a complimentary $75 Installation credit on all Online Orders. Limit one per customer. Terms and Conditions apply.
Need Help?
Rockford Fosgate Power T400-4: 4-Channel Amplifier for Powerful, Clear Sound
The Rockford Fosgate Power T400-4 is a high-performance 4-channel amplifier delivering 400 watts of powerful, clear sound. Designed for car audio enthusiasts who value precision and quality, this amplifier is part of Rockford Fosgate’s acclaimed Power Series. Whether upgrading a factory setup or building a custom system, the T400-4 provides the power, flexibility, and control needed for a superior listening experience.
Key Features
- Powerful Sound Output: 400 watts RMS delivers clean, dynamic sound for an immersive experience.
- 4-Channel Flexibility: Capable of driving four speakers or two speakers and a subwoofer.
- Class AB Efficiency: Blends high-quality sound with excellent efficiency and reliability.
- Dynamic Thermal Management: Helps regulate internal temperature for consistent, long-term performance.
- Precision Controls: Variable high-pass/low-pass crossovers and Punch EQ for personalized sound tuning.
Specifications
Specification | Details |
---|---|
Power Output | 100W x 4 @ 4Ω, 200W x 2 @ 4Ω Bridged |
Frequency Response | 20 Hz – 20 kHz |
Signal-to-Noise Ratio | >105 dB |
Crossover | Variable HP/LP (50 Hz – 500 Hz @ 12 dB/octave) |
Punch EQ | +0–18 dB Boost @ 45 Hz |
Dimensions | 2.4" x 7.8" x 11.0" (6.1 cm x 19.8 cm x 28.0 cm) |
Input Sensitivity | 150 mV – 4V (High-Level and Low-Level) |
Class | AB |
What’s In the Box
- Rockford Fosgate Power T400-4 Amplifier
- Mounting Hardware
- User Manual
Frequently Asked Questions
Q: What is the Rockford Fosgate Power T400-4?
A: The T400-4 is a 400-watt, 4-channel amplifier designed to deliver powerful and precise sound, suitable for a wide range of car audio setups.
Q: Can the T400-4 drive multiple speakers?
A: Yes, it can power four speakers or be bridged to run two speakers and a subwoofer for added versatility.
Q: What makes the T400-4 amplifier unique?
A: It features a Class AB design with Dynamic Thermal Management for excellent sound quality, efficiency, and long-term reliability.
Q: Is the T400-4 easy to install?
A: Absolutely. With high-level inputs and a compact chassis, it integrates seamlessly into both factory and aftermarket systems.
Q: Why choose the Rockford Fosgate Power T400-4?
A: The T400-4 combines power, sound clarity, and flexible configuration options, making it an excellent choice for enhancing your car audio experience.
Experience Powerful, Clear Sound with the Rockford Fosgate Power T400-4
Take your in-car audio to the next level with the Rockford Fosgate Power T400-4. Order today to enjoy superior sound performance and customized control every time you drive.

FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.