Mobile Electronics› Power Accessories

Rockford Fosgate

4-Channel Amplifier

$630.00

SKU: T400-4

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Rockford Fosgate Power T400-4 is a 4-channel car amplifier with 400 watts RMS total power output. It delivers 100W x 4 at 2-Ohm or 60W x 4 at 4-Ohm, and can be bridged to 200W x 2 at 4-Ohm. This Class A/B amplifier features a MOSFET power supply and output stage, with a 69% efficiency rating at 4-Ohm. It includes 24dB/octave Butterworth crossovers and Punch EQ for bass and treble adjustments.
Show original supplier description
The Rockford Fosgate T400-4 is a versatile 4-channel Class A/B amplifier delivering robust power for your car audio system. It produces 60 Watts RMS x 4 at 4-Ohms, 100 Watts RMS x 4 at 2-Ohms, and can be bridged to deliver 200 Watts RMS x 2 at 4-Ohms, making it stable at 2-Ohms bridged. This amplifier is ideal for setting up front/rear fading stereo systems or providing dedicated amplification for front speakers and rear subwoofers. It features a 24dB/octave crossover, MOSFET power and output stages, and 4-gauge power/ground connectors. The T400-4 also includes audiophile-grade speaker connections, a 2/4 channel input switch, and built-in Punch EQ with adjustable treble and bass for fine-tuning your sound. Designed with Dynamic Thermal Management, the T400-4 boasts a compact chassis that allows for flexible installation, even in tight spaces like under front seats. It also features differential inputs to eliminate noise picked up by signal cables, ensuring a clean signal transfer. The amplifier is CTA-2006 compliant, meaning its power ratings are based on industry standards for reliable performance. A 2-year warranty is included.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRockford Fosgate
Part NumberT400-4
CategoryMobile Electronics

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy