Name: Rockford Fosgate Power Marine TM400X4ad
Brand: Rockford Fosgate
SKU: tm400x4ad
Price: 629.99 USD
Availability: LimitedAvailability
Rating: 5.0000 (4 reviews)

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Product highlights

• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

Learn more about the tm400x4ad

$629.99

with warranty

FREE 1-day shipping to OH. Get it Wed, Nov. 19

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Additional conditions

New, Damaged Packaging $579.97

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Product Highlights

• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

Description

Authorized dealer

Product Details:

Power Series Class AD 2 ohm Stable 4-Channel Amplifier
RMS Power Rating:

4 ohm: 100 watts x 4 channel
2 ohm: 100 watts x 4 channel
Bridged: 200 watts x 2 channel @ 4 ohm

Total power output: 400 watts
LED Power/Protect Light
Speaker-level (high-level) inputs
CEA-2006 compliant
CLEAN set-up technology
Conformal-coated circuit board
Input sensitivity: .15 - 12 volts
Frequency Response: 20 - 20000 Hz
Total Harmonic Distortion (THD): <1%
Variable high-pass filter: 50 - 250 Hz
Variable low-pass filter: 50 - 250 Hz
Variable Bass Boost: 0 - 18 dB
Fuse Rating: 60A
8 AWG gauge amplifier wiring kit is recommended for installation
Dimensions: 8-5/8" L x 4-5/16" W x 1-11/16" H
Authorized Internet Dealer
1-year Manufacturer's Warranty
MFR #: TM400X4ad

Specifications & Details

Key Features

Amplifier Key Features

Bass Boost
Fan Cooled
Speaker Level Inputs
Weather-Resistant

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

100 watts x 4 channel

RMS Power @ 2 ohms

100 watts x 4 channel

Bridged RMS Power

200 watts x 2 channel

Amplifier Specifications

Series

Power Series

Amplifier Class

Number of Channels

4-Channel

Total Peak Power Output

400 watts

Total RMS Power Output

400 watts

Maximum Input Gauge Size

8 AWG

Minimum Impedance Unbridged

2 ohm

Minimum Impedance Bridged

4 ohms

Frequency Response

20 - 20000 Hz

THD at Rated RMS Power

<1%

Speaker Level Inputs

Yes

Built-in Crossover

Low-Pass (LP)
High-Pass (HP)
Full (AP)

High-Pass Crossover Frequency

50 - 250 Hz

Low-Pass Crossover Frequency

50 - 250 Hz

Bass Boost

0 - 18 dB

Remote bass/level controller

Fuse Rating

60A x 1

Total Fuse Rating

Sonic Certified Amplifier

Not Tested

Low-Level Input Sensitivity

.15 - 12 volts

What is in the box?

Paperwork

User manual
Warranty/Registration card
Quick start guide
Power certification

WITB: Amplifiers

Amplifier
High-level input wiring harness w/ molex connectors (2)

Other Accessory #1

Two 14" Input harnesses (2 RCA to 4-pin Molex)

Warranty and Return Policy

Parts Warranty Duration

1 year

Labor Warranty Duration

1 year

Warranty Provider

Manufacturer

Customer Ratings & Reviews

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By feature average rating

Durability		5
Value		5
Features		5
Design		5
Usability		5

Customer Photos & Videos

Customer Reviews

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Rockford Fosgate

My item arrived packaged well, is much smaller than I imagined and will be great for installing in my boat. I have used the T series amplifiers in the past in cars and have no doubt this amp will be perfect for my 4 boat speakers. The killer deal I got helps too! Took advantage of the additional warranty as well.

Update:
Installed this amplifier with a Kicker install kit and Kicker marine speaker wire, 4x 6.5" M1 marine speakers and the Memphis SMC3 head unit.
Seriously the best audio system I've ever heard on a boat, gets super loud and is super clear with phenomenal bass for 6.5" speakers. Sounds better than my buddies boats with wetsounds and JL setups and I only spent about $1,000 for the entire system. Setup with the built in clipping indicators made it easy to achieve full safe volume. Set my HPF to 50hz.

By Tyler on May 9, 2024 Checkmark Icon

Verified purchase

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By Terrance on March 11, 2024 Checkmark Icon

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Fosgate TM400X4ad – Small Amp, Big Attitude!

Running the Rockford Fosgate TM400X4ad in my 2013 Harley-Davidson Electra Glide Limited with 10 speakers, and let me tell ya this thing flat-out bangs. It’s small enough to tuck away clean, but the power it pushes is unreal. Crystal-clear highs, deep bass, and it keeps every one of those speakers screaming even at 80 down the highway. I’ve had people turn their heads at stoplights wondering where all that sound’s coming from — then I point to this little beast and they just shake their heads.

This amp runs cool, never clips, and delivers pure, clean power every ride. Rockford Fosgate really built a monster in a mini package with the TM400X4ad. Trust me you can hear me long before you see me roll up.

By Adam on October 5, 2025 Checkmark Icon

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By Kevin on April 28, 2025 Checkmark Icon

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Add-ons

NVX XKIT84

Full Spec 8 Gauge 100% (OFC) Oxygen Free Copper Complete 4-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 800 Watts

(38)

$79.98

List price $107.99

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Rockford Fosgate Power Marine TM400X4ad

$629.99

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