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Rockford Fosgate Power T400-4

400W RMS Power Series Class-AB 4-Channel Amplifier

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• 60 watts x 4 channel @ 4 ohms
• 100 watts x 4 channel @ 2 ohms
• Bridged: 200 watts x 2 channel @ 4 ohms
• Total RMS Power: 400 watts
• Class A/B 2 ohms Stable 4-Channel-Channel Amplifier

Learn more about the t400-4
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$399.99

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Product Highlights


• 60 watts x 4 channel @ 4 ohms
• 100 watts x 4 channel @ 2 ohms
• Bridged: 200 watts x 2 channel @ 4 ohms
• Total RMS Power: 400 watts
• Class A/B 2 ohms Stable 4-Channel-Channel Amplifier

Description


Rockford Fosgate brand icon

Authorized dealer

Product Details:

  • Power Series Class A/B 2 ohms Stable 4-Channel Amplifier
  • RMS Power Rating:
    • 4 ohms: 60 watts x 4 channel
    • 2 ohms: 100 watts x 4 channel
    • Bridged: 200 watts x 2 channel @ 4 ohms
  • Total power output: 400 watts
  • LED Power/Protect Light
  • Wired bass level remote control with optional Rockford Fosgate PEQ
  • CEA-2006 compliant
  • MOSFET power and output stages
  • Dynamic Thermal Management cooling system
  • Input sensitivity: .15 - 4 volts
  • Frequency Response: 20 - 20000 Hz
  • Total Harmonic Distortion (THD): <1%
  • Signal to Noise Ratio: 85 dB
  • Variable high-pass filter: 50 - 500 Hz
  • Variable low-pass filter: 50 - 500 Hz
  • Variable Bass Boost: 0 - 18 dB
  • Fuse Rating: 60A
  • 4 AWG gauge amplifier wiring kit is recommended for installation
  • Dimensions: 13-5/8" L x 9-5/8" W x 2-1/4" H
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty
  • MFR #: T400-4

Specifications & Details


Key Features
Amplifier Key Features
Bass Boost
Power Specifications - Full Range Channels
RMS Power @ 4 ohms
60 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
A/B
Number of Channels
4-Channel
Total RMS Power Output
400 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
2 ohms
Frequency Response
20 - 20000 Hz
THD at Rated RMS Power
<1%
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 500 Hz
Signal-to-Noise Ratio
85 dB
Bass Boost
0 - 18 dB
Remote bass/level controller
Optional (Accessory required and sold separately)
Fuse Rating
60A x 1 
Total Fuse Rating
60
Sonic Certified Amplifier
Not Tested
Low-Level Input Sensitivity
.15 - 4 volts
What is in the box?
Paperwork
User manual
Warranty/Registration card
WITB: Amplifiers
Amplifier
Mounting screws (4)
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

T400-4

Weight:

13.00lbs

Internal SKU:

t400-4

Internal Product ID:

9102

Product and How-to Videos


  • 3Sixty3 Aftermarket Setup Wizard Tutorial
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews



5 star
83%
4 star
17%
3 star
0%
2 star
0%
1 star
0%



Durability
4.9
Value
4.8
Features
4.8
Design
4.8
Usability
4.8

Customer Reviews

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WOW, very good performance

Origionaly intended to use the amp for my components but I ran out of money for toys so I am now stuck using this amp to power 2 Dayton Audio 15" reference subs temporarily. The subs are severely underpowered however they still sound fantastic. The birth sheet that came with the amp rated it at 'nearly' 500 watts RMS. Even when driving the amp at its peak output the distortion is minimal (would still not recommend it though). The only problem I have at all with this amp is that Punch EQ 18db adjust knob (only bass control knob that is compatable) can only adjust the rear channels. Not a big deal, I wouldnt use it anyway if it was on the components. The heat dispersion plate works well but if you have it in your trunk with no air circulation it will still overheat after about an hour IF running near full power.

For my ratings,

Value - was a 5 because Sonic Electronix has some of the best prices I can find from a higher end online dealer and I paid less for this amp than I would have for 400 RMS watt at walmart (not sure if walmart even knows that they are supposed to rate an amp at RMS not peak)

Look/design - 5 because I like simple asthetics, I dont need a bunch of flashy lights to show off since the only people that care about that are usually the people that dont know anything when it comes to stats and what the thing is for. I would rather show it off to people for its sound quality

Durability - 5 because I run it as close to full power as I can without getting distortion and it has no problem.

Features - 4 only because you cannot control all channels using the Punch EQ knob. They do make a bass control knob that will do that however it is not compatible with the Power series.

Ease of use - 5... plug and play (maybe adjust the gain and boost level a little bit but it sounded great right from the factory.

By Local disturbance on November 30, 2011

49

found this helpful.

Amazing power output

Received my amp yesterday and I'm using 4 channel 4ohm output for components. The birth sheet has the power output at 85 whats x 4 @ 4ohm. That's amazing. Sounds great hooked up to my front and rear door type-R components. I couldn't be happier with my purchase. Sonic had this product at my doorstep the next day after ordering.

By Yon on March 25, 2010

45

found this helpful.

im in love!

As soon as i hooked this amp up to my component sets and they are amazing great power! i had my speakers hooked up to a 4 channel 600 watt sony xplod amp and there is no comparison.

By dominic on August 23, 2011

41

found this helpful.

Good amp for highs.

Once I installed it and tweaked it, I never had to touch it, clear crisp highs. I would reccomend this amp.

By M&M on February 18, 2011

41

found this helpful.

Small, powerful, and clean

Huge power, birth sheet says 547w RMS. Incredibly small too. Puts out twice the power my Pioneer 2ch of same size does, and way cleaner too.

Have it pushing my 4 T1682s

By Kyle on March 14, 2010

42

found this helpful.

Great Amp!

This amp pushes extremely clean power to all 4 channels. I'm running Diamond S600s in the front and Beyma W6 in the rear for mid bass. This amp makes this speaker setup sound excellent. The highs are perfect and the lows are tight and hit hard. I definitely recommend this amp to anyone!

By Paul on February 4, 2008

41

found this helpful.

Soooo much power

I bought this amp to power my 4 6.5" door speakers and power them it does. Each speaker is rated at 50 watts RMS at 4 Ohms and I have to turn the gain on the amp way down to keep the speakers from blowing out of the door. The birth sheet shows significantly higher power ratings than is advertised for as well. In my opinion you cannot go wrong with this amp at all.

By Quincy on February 25, 2010

39

found this helpful.

Good Buy

Makes my interior speakers sound great. Would recommend this amp to anyone.

By Jimmy on August 13, 2009

40

found this helpful.

Rockford t400

I have the T400 powering my focal 6.5 poly glass, it helps them scream to my satisfaction. I have no problem with the amp getting hot or handling my finger going to the volume .

By Jpf 6110 on September 12, 2013

37

found this helpful.

Beast amps

Gotta say RF has some of the best amps on the market,love the power and sound quality from the RF amps.

By John on November 29, 2014

36

found this helpful.

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