--- product_id: 20191156 title: "Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier" brand: "rockford fosgate" price: "2973.71 DT" currency: TND in_stock: true reviews_count: 8 url: https://www.desertcart.tn/products/20191156-rockford-fosgate-power-t400x4ad-400-watt-4-channel-amplifier store_origin: TN region: Tunisia --- # 400W max power output Class-AD Constant Power tech Ultra-compact 1.6” x 4.3” x 8.3” size Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier **Brand:** rockford fosgate **Price:** 2973.71 DT **Availability:** ✅ In Stock ## Summary > ⚡ Compact Power, Massive Impact — Own the Sound, Own the Road! ## Quick Answers - **What is this?** Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier by rockford fosgate - **How much does it cost?** 2973.71 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/20191156-rockford-fosgate-power-t400x4ad-400-watt-4-channel-amplifier) ## Best For - rockford fosgate enthusiasts ## Why This Product - Trusted rockford fosgate brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Versatility:** Configurable input harness accepts both RCA and speaker-level signals for seamless integration in hybrids, EVs, motorcycles, and UTVs. - • **Built to Endure & Impress:** Rockford Fosgate’s legendary build quality with thermal lock extrusion and dual fan cooling keeps your amp running cool and reliable. - • **Precision Sound Sculpting:** On-board Punch EQ with +18dB boost at 45Hz and Butterworth crossover lets you tailor your bass and mids like a pro. - • **Consistent Output, Any Load:** Proprietary Constant Power tech ensures up to 25% more power across 2-Ohm and 4-Ohm loads—no compromises. - • **Powerhouse in a Compact Frame:** Delivers 400 Watts of clean, punchy power in a sleek, space-saving design perfect for any ride. ## Overview The Rockford Fosgate Power T400X4ad is a 400-Watt, 4-channel Class-AD amplifier featuring proprietary Constant Power technology for consistent output at 2-Ohm and 4-Ohm loads. Its ultra-compact design fits perfectly in small vehicles, hybrids, and motorcycles, while advanced features like Punch EQ, CLEAN clip detection, and robust thermal management ensure premium sound quality and reliability. Backed by Rockford Fosgate’s trusted build and a 2-year warranty, it’s engineered for professionals and enthusiasts who demand power without compromise. ## Description The Power T400X4ad is an ultra-compact, 400-Watt 4-channel amplifier built on Rockford Fosgate’s proprietary Class-AD technology platform, featuring Constant Power to produce the same output at both 4-Ohm and 2-Ohm impedances. This design is highly efficient, making it perfect for hybrid, electric, small cars, trucks, motorcycles, and side-by-side UTVs. Our Constant Power technology, results in up to 25% more output power by balancing demand vs draw. Flexible vehicle integration is achieved via a configurable input harness with Molex style connectivity that accepts both RCA and speaker level signals. The Power T400X4ad features top mounted controls, allowing easy access to the built-in crossover and C.L.E.A.N. input/output clip detection circuits, and our patented Punch EQ. The 3-stage thermal lock extrusion with dual fan forced induction keeps everything cool while real-time thermal/protection schemes safeguard the amplifier. The T400X4ad is ideal for those installations where you need a compact amplifier that can produce serious high output power. ## Features - Our ultra-compact (1.6” x 4.3” x 8.3”) Power T400X4ad 4-channel amplifier produces more power per square inch than any other model we make with 400 Watts of POWER - Proprietary Constant Power amps are the most powerful on the market, delivering up to 25% more power across all impedance loads (100 Watts x 4 @ 4-Ohm or 100 Watts x 4 @ 2-Ohm or 200 Watts x 2 @ 4-Ohm Bridged) - Proprietary Class-AD technology, featuring Constant Power to produce the same output at both 4-Ohm and 2-Ohm, making it perfect for hybrid, electric, small cars, trucks, motorcycles, and side-by-side UTVs - High-level auto turn-on, CLEAN circuit input/output clip detection, On-board Punch EQ with +18dB boost @ 45Hz and 12dB/octave Butterworth crossover make T400X4ad an impressive POWER house - Famous Rockford Fosgate build quality ensures that the T400X4ad will handle everything you throw at it! Full 2-year parts and labor warranty ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B00LMNLGDY | | Best Sellers Rank | #57,186 in Electronics (See Top 100 in Electronics) #116 in Car Multichannel Amplifiers | | Brand Name | Rockford Fosgate | | Customer Reviews | 4.7 4.7 out of 5 stars (118) 4.7 out of 5 stars | | Global Trade Identification Number | 00780687342388 | | Included Components | A Amplifier With Standard Accessories | | Item Dimensions | 11 x 3 x 6 inches | | Item Highlight | Class-AD with Constant Power | | Item Weight | 3 pounds | | Manufacturer | Rockford Fosgate | | Material Type | Electronic component material and epoxy | | Maximum Output Power | 400 watts | | Maximum Supply Voltage | 12 volts_of_direct_current | | Model | T400X4ad | | Mounting Type | Boat Mount | | Number Of Channels | 4 | | Number Of Items | 1 | | Number Of Packs | 1 | | Output Power | 400 watts | | Package Type Name | box" or "installation kit | | Part Number | T400X4ad | | Specification Met | Implied 12v Standard Voltage and Potential Compliance With Industry-specific Audio Standards | | Unit Count | 1 Count | | Upc | 780687342388 | | Voltage | 12 volts | | Warranty Description | 1-Year Manufacturer Warranty | ## Product Details - **Item dimensions L x W x H:** 11 x 3 x 6 inches - **Manufacturer:** Rockford Fosgate - **Maximum Supply Voltage:** 12 volts_of_direct_current - **Mounting Type:** Boat Mount - **Voltage:** 12 volts ## Images ![Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier - Image 1](https://m.media-amazon.com/images/I/61M8GZUoafL.jpg) ![Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier - Image 2](https://m.media-amazon.com/images/I/61P7iYL7VxL.jpg) ![Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier - Image 3](https://m.media-amazon.com/images/I/51blsFulMXL.jpg) ![Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier - Image 4](https://m.media-amazon.com/images/I/6160NiCwC+L.jpg) ![Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier - Image 5](https://m.media-amazon.com/images/I/51CkqPPe3QL.jpg) ## Questions & Answers **Q: Theses are just micro amps right? Can be used in car not just bikes** A: That is correct. You can use them for any application you would use a normal amp for. Because of their size they are typically used in settings that have very limited space. **Q: Does this amp come with any wiring? Looks like they changed the rca plug to something else on the amp** A: There is a molex that plugs into the amp that has the RCA's on it., I can offer you a very aggressive price on this unit and all needed install items. Simply text me at 512-750-8726 for a quote. Thanks!! **Q: is there a mounting plate for a 2012 victory cross country** A: Unfortunately, no. You would need to fabricate your own mounting plate. Thanks for your interest! **Q: Is this better in sound quality than Rockford's Prime line up ?** A: Yes! Absolutely I own both and sound is way better with the power series’s ## Customer Reviews ### ⭐⭐⭐⭐⭐ Must Buy *by on Reviewed in the United States August 3, 2026* So far this is amazing, great power, compact, looks great, and sound even better! ### ⭐⭐⭐⭐⭐ Rockford always over performs *by on Reviewed in the United States November 20, 2021* As every Rockford amp I've ever owned ( more than 20 ) this little giant puts out crazy numbers, has great sound quality and will last, the only knock I have are the connectors, they can be finicky and the RCA's are not of the best quality, which are easily replaced, other than than this little monster will amaze you, something that small using that little current could put out levels like it does. ### ⭐⭐⭐⭐⭐ High quality, very underrated! *by on Reviewed in the United States August 12, 2018* This amp is great! Started with just one, and now I have several of them. When these small Rockfords first came out, they were expensive, maybe $800. Once production ramped up, they dropped to half that.My amps are in a very high end system with ten (10) active channels - eight (8) of which come through two of these amps. Overall, the system is probably a $15,000 stereo, and this amp has all of the quality you’d need to fit right into a system of that caliber. The info lights on the amp let you set the gains to safe levels without using an external device, so installation is fairly easy.Don’t be fooled by the size, it’s a seriously high end amplifier. The reason it’s small isn’t because there’s less amplifier. It’s because the cooling is active, rather than passive (i.e. it has cooling fans). That means the heat doesn’t need to get spread over a large area. Instead, fans just blow heat away, meaning there’s no need for a large heat sink. Basically, the electronics are full scale, and the cooling solution allows a smaller size.The main reason to get this amp over other 4-channel amps is because of the Constant Power circuitry. Basically, it won’t be louder or quieter depending on which impedance load your speakers have. That means you can run 4-ohms to keep your amps cool without losing any noticeable sound volume. Great product! ## Frequently Bought Together - Rockford Fosgate T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier - Rockford Fosgate T1650 Power 6.5" 2-Way Coaxial Full Range Speakers - Black (Pair) - Rockford Fosgate R2-500X4 Prime 500-Watt 4-Channel Amplifier --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/20191156-rockford-fosgate-power-t400x4ad-400-watt-4-channel-amplifier](https://www.desertcart.tn/products/20191156-rockford-fosgate-power-t400x4ad-400-watt-4-channel-amplifier) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-13*