Rockford Fosgate T400X4AD
Power Series Class-ad 400W 4 Channel Amplifier
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Rockford Fosgate T400X4AD: 4-Channel Amplifier for Dynamic, Versatile Sound
Bring power and precision to your car audio system with the Rockford Fosgate T400X4AD, a 400-watt 4-channel amplifier designed for clarity, efficiency, and flexibility. As part of the Power Series, this compact yet robust amplifier features advanced Class AD technology and smart thermal management, making it a top-tier solution for serious audio enthusiasts seeking premium performance in a space-saving design.
Key Features
- 400 Watts RMS Output: Capable of delivering 100W x 4 @ 4Ω or 200W x 2 @ 4Ω bridged for full system versatility.
- Class AD Technology: Blends Class AB sound quality with Class D efficiency for clean, dynamic audio.
- 4-Channel Versatility: Perfect for powering four speakers or bridging to drive subwoofers.
- Ultra-Compact Footprint: Designed to fit in tight spaces without compromising performance.
- Dynamic Thermal Management: Keeps the amp cool and reliable during extended playback sessions.
- Advanced Tuning Controls: Features variable HP/LP crossovers, Punch EQ, and C.L.E.A.N. technology for optimal setup.
Specifications
| Specification | Details |
|---|---|
| Power Output | 100W x 4 @ 4Ω, 200W x 4 @ 2Ω, 200W x 2 @ 4Ω Bridged |
| Frequency Response | 20 Hz – 20 kHz |
| Signal-to-Noise Ratio | >80 dB |
| Crossover | Variable HP/LP (50 Hz – 500 Hz @ 12 dB/octave) |
| Punch EQ | Up to +18 dB Boost @ 45 Hz |
| Dimensions | 1.6" x 4.3" x 8.3" (4.06 cm x 10.92 cm x 21.08 cm) |
| Input Sensitivity | 150 mV – 4V (High-Level and Low-Level) |
| Class | AD |
What’s In the Box
- Rockford Fosgate T400X4AD 4-Channel Amplifier
- Mounting Hardware
- User Manual
Frequently Asked Questions
Q: What is the Rockford Fosgate T400X4AD?
A: It’s a compact 4-channel amplifier delivering 400 watts RMS with Class AD technology, designed for high-efficiency and high-fidelity sound.
Q: Can the T400X4AD power multiple speakers?
A: Yes, it can run four full-range speakers or be bridged to power two subwoofers with clean, powerful audio output.
Q: What makes this amplifier unique?
A: Its hybrid Class AD design offers the best of Class AB clarity and Class D efficiency, along with smart features like C.L.E.A.N. setup and thermal control.
Q: Is it suitable for tight spaces?
A: Absolutely. Its ultra-compact dimensions make it perfect for vehicles with limited space, without compromising sound quality or power.
Q: Why choose the T400X4AD for my car audio system?
A: It’s a powerhouse in a small package — delivering precise, dynamic sound, customizable controls, and robust build quality for the ultimate upgrade.
Experience Dynamic, High-Efficiency Sound with the T400X4AD
Upgrade your car audio system with the Rockford Fosgate T400X4AD. Order today and enjoy clean, powerful sound performance that fits wherever you need it.
What Others Are Saying
Eddie was great - SDCS installed a new head unit in my 2019 4Runner. He was honest in his opinions regarding the options I was considering. Pricing was also good - he was able to reuse some of my existing installation kit so I saved a bit of $$.Installation was clean and fast and he took the time to walk through the features before I left. Highly recommend!!
I had a great time at this shop! The staff really knows their stuff and took the time to explain the different options without pressure. Installation was quick, clean and professional. Everything looks factory and sounds amazing. The prices were fair and customer service was above and beyond. I highly recommend this place if you're looking for quality car audio and excellent service.
Those guys are really professional! I had a new Alpine floating head unit installed in my 2008 Mercedes, and it feels like a brand-new car. The installation was super clean. At first, the sound wasn’t the same as the factory stereo, but Kevin tuned it to be just as good—if not better—without adding any new amps. They even used my factory GPS antenna so I don’t have extra wires hanging out. On top of that, they matched the online price. Big thanks to Kevin and Eddie—highly recommended!
Kevin was awesome, he took his time and explained everything to me. I went in initially for a dash cam install and then decided to get a sub and amp installed as well. Both turned out great and will be returning if I need more work done.
Came In not knowing what to expect when suddenly my stereo stopped working. Spoke with Kevin in the front and after a VERY fast diagnosing they discovered my wiring was incorrect. After only about 45 minutes total being in the store I was on my way to the beach with a working stereo again! Thank you so much SDCARSTEREO
Highly recommend Kevin and the team at San Diego Car Stereo for any issues with aftermarket stereos. I bought a car with an aftermarket stereo and AC unit that wasn’t working properly—specifically, the heat wasn’t functioning due to an improper setup. I had several people look at it with no luck, and even the dealership basically refused to help because it was an aftermarket install. I came to Kevin and his team over the holidays feeling pretty defeated, but he was confident he could get the heat working before I headed back to a Colorado winter. Sure enough, he got it done.
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.