SKU: 5424927146

Rockford Fosgate Power T400X4AD - 4 Channel Ultra-Compact Amplifier

Sale price$220.50 Regular price$245.00
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Description

Rockford Fosgate Power T400X4AD - 4 Channel Ultra-Compact AmplifierRockford Fosgate Power T400X4AD 4 Channel Ultra Compact Class AD Amplifier The Power T400X4AD 400 Watt 4 channel ultra compact, amplifier is built on Rockford Fosgates proprietary Class AD technology, featuring Constant Power to produce the same output at both 4 Ohm and 2 Ohm impedances. Flexible vehicle integration enabled through low level and high level inputs with auto turn on. Top mounted controls allow easy access to built in crossover and C. L.

Rockford Fosgate Power T400X4AD - 4 Channel Ultra-Compact Class AD Amplifier

The Power T400X4AD 400 Watt 4-channel ultra-compact, amplifier is built on Rockford Fosgate’s proprietary Class-AD technology, featuring Constant Power to produce the same output at both 4-Ohm and 2-Ohm impedances. Flexible vehicle integration enabled through low-level and high-level inputs with auto turn-on. Top mounted controls allow easy access to built-in crossover and C.L.E.A.N. input/output clip detection circuits. The 3-stage thermal lock extrusion with dual fan forced induction keeps everything cool while real-time thermal/protection schemes safeguard the amplifier.

  • Number of Channels: 4
  • Rated Power(RMS Continuous Power):
  • 100 Watts x 4 @ 4-Ohms
  • 100 Watts x 4 @ 2-Ohms
  • 200 Watts x 2 @ 4-Ohms Bridged
  • Total Power (Sum of Rated Power): 400 Watts RMS
  • Dynamic Power (PVC/PowerCube® Measurement)
  • 128 Watts x 4 @ 4-Ohm
  • 152 Watts x 4 @ 2-Ohm
  • 290 Watts x 2 @ 4-Ohm Bridged
  • Bridgeable: Yes:
  • Front Terminals: Left (+) Right (-)  
  • Rear Terminals: Left (+) Right (-)
  • Crossover Controls:
  • High-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth  
  • Low-Pass: 50Hz - 250Hz @ 12dB/Octave Butterworth 
  • All-Pass: Yes
  • Tone Controls:
  • Front Channels - Punch EQ
  • Treble: 0dB to +12dB @ 12kHz
  • Bass: 0dB to +18dB @ 45Hz
  • Rear Channels - Punch EQ
  • Treble: 0dB to +14dB @ 12.5kHz
  • Bass: 0dB to +18dB @ 45Hz
  • Signal Input:
  • Front Low level: Front High/Low Level Input: 4-Pin harness
  • Rear Low level: Rear High/Low Level Input: 4-Pin harness
  • Signal Output: N/A
  • Power Input Connector: Detachable Compression Terminal
  • Power Wire Gauge: 10 AWG
  • Speaker Output Connector:
  • Front: 4-Pin Harness
  • Rear: 4-Pin Harness
  • Speaker Wire Gauge: 16 AWG
  • Heat Sink Type: Extruded Aluminum
  • Cooling: Dual Fan Cooled
  • Remote Controls:
  • Visual Indicators:
  • Power: Blue LED 
  • Protect: Red LED 
  • Input Clip: Red LED 
  • Output Clip Blue/Red LEDrock
  • Circuit Topology Class: Class A/B
  • Frequency Response: 20Hz to 20kHz +/- 1dB
  • Dimensions (HxWxL):
  • 1.6 x 4.25 x 8.3 (in)
  • 4.1 x 10.79 x 21.1 (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: 5424927146

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4.5 ★★★★★
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Elizabeth Henderson
Birmingham, US
★★★★★ 4
Very narrow
Size: 10 Wide, Color: Cognac
Run narrow. For very narrow feet. Wide width fits like a regular width.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 9, 2026
M
Verified Purchase
Mynx
Draper, US
★★★★★ 5
Comfortable Shoes Right Out of the Box
Size: 9, Color: Black
I bought these shoes for my husband. He has a very hard time finding quality, comfortable shoes. These shoes are just as comfortable as his New Balance. He uses them as a dress shoe and wears them at least once a week. There was no break in period necessary. They were comfortable right out of the box! The only thing we didn't like was the white sole color. Once I knew he was going to keep them, I used a black sharpie marker to color the soles black. Instant amazing, comfortable dress shoes. They were well worth the cost. If you or your SO needs a comfortable pair of shoes, we highly recommend them.
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Reviewed in the United States on September 2, 2025
R
Verified Purchase
Rmanuel
New York, US
★★★★★ 1
Paid for new, received used.
Size: 9.5 Wide, Color: Cognac, Size: 9.5 Wide, Color: Cognac
Arrived dirty as if someone whore it for more than a few days. Maybe I was mistaken, but I saw nothing about “previously used” on the Amazon page. Returned it. I would suggest that the company use quality control when it comes to shipping. The shoes seem find otherwise. I ordered 9.5 and it was just a bit tight. If I reorder I will go for size 10.
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Reviewed in the United States on June 11, 2026
F
Verified Purchase
Fletch
Chelsea, US
★★★★★ 5
Overall Great.
Size: 10.5 Wide, Color: Black
Great product. Great value. Great style. Overall great.
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Reviewed in the United States on March 3, 2026
B
Verified Purchase
B.J. G
Draper, US
★★★★★ 3
Decent Shoes with Misleading Description (Not Leather)
Size: 12 Wide, Color: Black, Size: 12 Wide, Color: Black
I only look for leather when I’m purchasing dress shoes. Under the description “details” on this item it lists the shoe as leather upper and inner lining. A photo shows “genuine Napa leather lining”. If you keep reading (which I have now that I’ve received the shoes) it shows “faux leather” in the small print and that is not “leather”. I run a small leather business and this irks me because it’s clearly false advertising. The details also show the product is made in Brazil but when they arrived today, the shoe tag shows “Made in China” and “Man Made upper and lower”. I don’t hate the shoes. They look nice. What I know is they won’t hold up over time like leather, which is why the description should be accurate and not misleading.
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Reviewed in the United States on March 28, 2026

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