Best T400x4ad Deals of Nov 2026

Updated November 10, 2026Our site contains affiliate links for which we may be compensated.
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Rockford Fosgate

30% Off

Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier | Class-AD with Constant Power

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
Details & specs
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on Amazon.com
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Rockford Fosgate

$76 Savings

Rockford Fosgate Power TM400X4ad 400-Watt 4-Channel Marine Amplifier | Class AD, Element Ready: Built to Stand Up to the Marine Environment

Our compact (1.6” x 4.3” x 8.3”) Power Marine TM400X4ad 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)
Built on Rockford Fosgate’s proprietary Class-AD technology and Element Ready protecting against dust, UV, and corrosion, making it perfect for motorsport and marine applications
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 TM400X4ad an impressive POWER house
Famous Rockford Fosgate build quality ensures that the TM400X4ad will handle everything you throw at it! Full 2-year parts and labor warranty
Details & specs
Check Price
on Amazon.com
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Amplifier mount is Compatible with Harley Davidson & Rockford Fosgate T400x4AD TM400x4AD T400x2AD or TM400x2AD Amplifier Mounting Bracket fit 2006 to 2013 batwing bikes with aftermarket or stock radio

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Amp Mount fits Victory Cross Country and Magnum Amplifier Mounting Bracket fits Rockford Fosgate T400x4AD or TM400x4AD Amp. Mount Your Amp Securely to Your Bike

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on Amazon.com
Our #1 Pick Today
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Rockford Fosgate

30% Off

Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier | Class-AD with Constant Power

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
Details & specs
Check Price
on Amazon.com
Disclaimer: While we make every effort to ensure accuracy, we cannot guarantee that all product specifications, pricing, discounts, and details are complete or error-free. Because information is subject to change, we recommend verifying all details directly with the retailer prior to making a purchase. As an Amazon Associate, we earn from qualifying purchases.

9 T400x4ad deals are available from: Amazon, starting from $34.99.

The biggest discount we found is 30% on Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier | Class-AD with Constant Power (T400X4ad) at Amazon.

The lowest price we found is $34.99 while the highest is $399.99. Prices for the best T400x4ad deals average at $124.43.