SKU: 60039034625

Rockford Fosgate Power T400-4 - 4 Channel Amplifier

Sale price$217.35 Regular price$241.50
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Ships within 48 hours · Estimated delivery Sep 22 - Sep 27

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Description

Rockford Fosgate Power T400-4 - 4 Channel AmplifierRockford Fosgate Power T400 4 400 Watt 4 Channel Amplifier The T400 4 amplifier is perfect for front rear fading stereo systems or when dedicated amplification is required between front stage speakers and rear subwoofer(s). Thanks to the Dynamic Thermal Management, the small chassis design insures it can be installed in any location like under front seats. Number of Channels: 4 Rated Power(RMS Continuous Power): 60 Watts x 4 @ 4 Ohms 100 Watts x 4 @ 2

Rockford Fosgate Power T400-4 400 Watt 4-Channel Amplifier

The T400-4 amplifier is perfect for front/rear fading stereo systems or when dedicated amplification is required between front stage speakers and rear subwoofer(s). Thanks to the Dynamic Thermal Management, the small chassis design insures it can be installed in any location – like under front seats.

  • Number of Channels: 4
  • Rated Power(RMS Continuous Power):
  • 60 Watts x 4 @ 4-Ohms
  • 100 Watts x 4 @ 2-Ohms
  • 200 Watts x 2 @ 4-Ohms Bridged
  • 2-Ohms x 2 Bridged Stable
  • Total Power (Sum of Rated Power): 400 Watts RMS
  • Dynamic Power (PVC/PowerCube® Measurement)
  • Front Channels
  • 90 Watts x 2 @ 4-Ohms 0° Res
  • 154 Watts x 2 @ 2-Ohms 0° Res
  • Rear Channels
  • 90 Watts x 2 @ 4-Ohms 0° Res
  • 154 Watts x 2 @ 2-Ohms 0° Res
  • Bridgeable: Yes
  • Crossover Controls:
  • Front High-Pass (HP): 50-500Hz 24dB/octave Butterworth
  • Front Low-Pass (LP): 50-500Hz 24dB/octave Butterworth
  • Rear High-Pass (HP): 50-500Hz 24dB/octave Butterworth
  • Rear Low-Pass (LP): 50-500Hz 24dB/octave Butterworth
  • Tone Controls:
  • Front Channels - Punch EQ
  • Treble: 0dB to +12dB @ 12kHz
  • Bass: 0dB to +18dB @ 45Hz
  • Rear Channels - Punch EQ
  • Treble: 0dB to +12dB @ 12kHz
  • Bass: 0dB to +18dB @ 45Hz
  • Signal Input:
  • Front Low level: 1 RCA pair
  • Rear Low level: 1 RCA pair
  • Signal Output: N/A
  • Power Input Connector: Block
  • Power Wire Gauge: 4 AWG
  • Speaker Output Connector: Screw terminal barrier strip
  • Speaker Wire Gauge: 8 AWG to 18 AWG
  • Heat Sink Type: Cast aluminum
  • Cooling: Convection
  • Remote Controls: Optional Remote Punch EQ
  • (overrides rear channel built-in Punch EQ)
  • Visual Indicators:
  • Power
  • Thermal
  • Protect
  • Circuit Topology Class: Class A/B
  • Frequency Response: 20Hz to 20kHz +/- 1dB
  • Dimensions (HxWxL):
  • 2.14 x 8.14 x 13.66 (in)
  • 5.42 x 20.68 x 34.69 (cm)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 60039034625

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J
Verified Purchase
Joe H.
Pawtucket, US
★★★★★ 5
Very Expensive
Had one cylinder misfiring so replaced coil and spark plug. Runs fine now, but old plug looked shot after only 5 months so I think the coil was the problem. Really good plug so far but very expensive.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
R
Verified Purchase
rkab8745
Belleville, US
★★★★★ 5
A reliable set of spark plugs.
They’re made in Germany, what else can you say
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
A
Verified Purchase
Amazon Customer
Alexandria, US
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
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Reviewed in the United States on April 29, 2026
C
Verified Purchase
Christopher D. Bodirsky
Lexington, US
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
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Reviewed in the United States on April 27, 2026
B
Verified Purchase
Britincali
Los Angeles, US
★★★★★ 5
Upgrade from OEM
After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is. These were an upgrade from OEM parts. They were gapped perfectly for the car. They took 20mins to fit and work fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026

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