---
product_id: 20191156
title: "T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier"
brand: "rockford fosgate"
price: "€ 1165.06"
currency: EUR
in_stock: true
reviews_count: 8
category: "Rockford Fosgate"
url: https://www.desertcart.gr/products/20191156-t400x4ad-power-400-watt-class-ad-4-channel-amplifier
store_origin: GR
region: Greece
---

# 400W Power 4 Channels Compact Design T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier

**Brand:** rockford fosgate
**Price:** € 1165.06
**Availability:** ✅ In Stock

## Summary

> 🎶 Amplify Your Ride with Power and Precision!

## Quick Answers

- **What is this?** T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier by rockford fosgate
- **How much does it cost?** € 1165.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/20191156-t400x4ad-power-400-watt-class-ad-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

- • **Advanced Audio Control:** On-board Punch EQ for tailored sound enhancement.
- • **Rock-Solid Reliability:** Backed by a 2-year warranty for peace of mind.
- • **Unmatched Power Density:** Experience 400 Watts of power in a compact form factor.
- • **Versatile Compatibility:** Perfect for any vehicle type, from cars to motorcycles.
- • **Constant Power Technology:** Delivers consistent output across all impedance loads.

## Overview

The Rockford Fosgate T400X4ad is a high-performance 4-channel amplifier that delivers an impressive 400 Watts of power in an ultra-compact design. With proprietary Constant Power technology, it ensures optimal performance across various impedance loads, making it ideal for a wide range of vehicles. Enhanced audio control features and robust build quality make this amplifier a top choice for audio enthusiasts.

## Description

Product description Serious Power. Seriously Compact. T400X4ad 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. Power 400-Watt Class AD 4-Channel Amplifier Rated Power: 100 Watts x 4 @ 4-Ohm OR 100 Watts x 4 @ 2-Ohm OR 200 Watts x 2 @ 4-Ohm Bridged CLEAN Technology for Quick Set Up Punch EQ Boost Circuit Upgraded RCA Connectors Power Wire Gauge: 8 AWG / Speaker Wire Gauge: 16 AWG Recommended Fuse (not included): 60 A Dimensions (H x W x D): 1.6" x 4.3" x 8.3" Easy Top Access to the Best Technology We Offer Top mounted controls allow easy access to the built-in low pass crossover, patented Punch EQ boost circuit and our patented C.L.E.A.N. input/output clip detection circuits Keeping Cool in the Hottest Conditions We use "dual fan forced induction" to pull the fresh air in, draw heat off the circuitry and drive it out of the amplifier. This ensures the amp continues to play even under the most demanding musical scenarios Quick Disconnects Equal Quick Installation Utilizing Molex style connectors means that installation is easier and quicker than ever before. Literally being able to plug in the amp simplifies the process and allows more reliable connections

Review: Rockford always over performs - 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.
Review: High quality, very underrated! - 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!

## 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 | #229,109 in Electronics ( See Top 100 in Electronics ) #544 in Car Multichannel Amplifiers |
| Brand | Rockford Fosgate |
| Brand Name | Rockford Fosgate |
| Customer Reviews | 4.6 out of 5 stars 115 Reviews |
| Global Trade Identification Number | 00780687342388 |
| Included Components | A Amplifier With Standard Accessories |
| Item Dimensions | 11 x 3 x 6 inches |
| Item Weight | 3 Pounds |
| Item dimensions L x W x H | 11 x 3 x 6 inches |
| Manufacturer | Rockford Fosgate |
| Maximum Supply Voltage | 12 Volts (DC) |
| Model | T400X4ad |
| Mounting Type | Boat Mount |
| Number of Channels | 4 |
| 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 |
| UPC | 780687342388 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | 1-Year Manufacturer Warranty |

## Product Details

- **Item dimensions L x W x H:** 11 x 3 x 6 inches
- **Voltage:** 12 Volts
- **Manufacturer:** Rockford Fosgate
- **Mounting Type:** Boat Mount
- **Brand:** Rockford Fosgate

## Images

![T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier - Image 1](https://m.media-amazon.com/images/I/61M8GZUoafL.jpg)
![T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier - Image 2](https://m.media-amazon.com/images/I/61P7iYL7VxL.jpg)
![T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier - Image 3](https://m.media-amazon.com/images/I/51blsFulMXL.jpg)
![T400X4ad Power 400 Watt Class-ad 4-Channel Amplifier - Image 4](https://m.media-amazon.com/images/I/6160NiCwC+L.jpg)
![T400X4ad Power 400 Watt Class-ad 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

### ⭐⭐⭐⭐⭐ Rockford always over performs
*by C***. on 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 M***O on 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!

### ⭐⭐⭐⭐⭐ Powerful little 4 channel amp
*by B***M on April 28, 2020*

Clean mids and highs. Lots of dynamic headroom. No cons from me.

## 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

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-06-03*