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Rockford Fosgate  T400X4AD

Power Series 4-Channel 100W RMS x 4 at 2-Ohms, Class AD Ultra Compact Full Range Car Amplifier

Item #38761

Condition:   Brand New

Product Highlights

  • Power Series
  • 4-Channel
  • 400 Max Power
  • Class-AD
  • Ultra-Compact
  • Full-Range Car Amplifier

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$569.99

Reg. Price $609.50  Save $39.51
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Rockford Fosgate T400X4AD Power Series 4-Channel 100W RMS x 4 at 2-Ohms, Class AD Ultra Compact Full Range Car Amplifier


We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • Power Series 4-Channel Class-AD Ultra Compact Full Range Car Amplifier
  • • (2) 14" Input harnesses (4-pin Molex connector to 2 female RCAs)
  • • (2) 8" Speaker output harness (4-pin Molex connector to bare wire)
  • • Amplifier Quick Setup sheet
  • • Certificate of Performance Verification
  • Owner's Manual

 

 

Big Power in a Small Space That Actually Delivers

The Rockford Fosgate T400X4AD Class AD Ultra Compact Full Range Car Amplifier is built for car audio enthusiasts who want serious performance without sacrificing space. This ultra compact design still pushes strong output with 100 watts per channel at 4 ohms or 2 ohms, plus up to 400 watts bridged at 4 ohms when you want more punch. Its advanced Class AD architecture blends efficiency with full range precision, using dynamic frequency switching to keep your sound detailed and clean even at lower volume levels.

Smart Power Delivery and Cleaner Sound You Can Hear

This amp is not just about raw output, it is about controlled and intelligent performance. The constant power delivery system adjusts voltage and current in real time based on what your music demands, giving you up to 25 percent more usable output with better dynamic response. Post choke feedback correction constantly compares input and output at the speaker terminals, reducing distortion so your music stays accurate, tight, and true to the source instead of getting muddy or harsh.

Easy Tuning, Cool Operation, and Full System Control

Setting up your system is simple thanks to C.L.E.A.N. gain calibration technology, which uses LED indicators to help you match input and output levels without extra tools or guesswork. You also get top mounted controls for front and rear channels, crossover modes, frequency tuning, and Punch EQ so you can shape your sound exactly how you want it. A full adjustable crossover network with high pass, low pass, or full range modes gives you flexibility, while dual fan cooling keeps temperatures stable during long sessions. Add smart protection LEDs, flexible RCA and speaker level inputs with auto turn on, and efficient plug in power connections, and you have a compact amplifier that makes system building easier and sound better every time you drive.


SPECIFICATIONS


  • Maximum Power : 400 Watts
  • Low Frequency Response : 50-250 Hz
  • High Frequency Response : 50-250 Hz
  • Number of Channels : 4
  • Frequency Response : 20-20000 Hz
  • Built In Crossovers : Yes
  • RMS Power Output : 4x100 Watts
  • Amplifier Class : AD
  • Fuse Rating : 60 A

FEATURES


Features:

  • Ultra-Compact High-Output Design: Delivers 100 watts per channel at 4Ω or 2Ω, with bridged capability reaching 400 watts at 4Ω, all within a chassis designed for tight installation spaces without sacrificing performance.
  • Advanced Class AD Amplification Architecture: Combines high-efficiency bd-derived topology with full-range precision, using Dynamic Frequency Switching to enhance resolution at lower output levels.
  • Post Choke Feedback Signal Correction: Continuously compares input and output signals at the speaker terminals to reduce distortion and maintain clean, accurate audio reproduction across all channels.
  • Constant Power Delivery System: Actively adjusts voltage and current in real time based on musical demand, providing up to 25% increased output power with improved dynamic response.
  • Dual Fan Forced Cooling System: Integrated cooling design actively pulls air across internal MOSFETs and heat zones, maintaining stable operating temperatures during sustained high-output use.
  • C.L.E.A.N. Gain Setup Technology: LED-based calibration system allows precise input and output level matching without external test. equipment, reducing distortion risk and optimizing system performance
  • Top-Mounted Precision Controls: Independent front and rear channel adjustments for input level, crossover mode, frequency tuning, and Punch EQ allow flexible system configuration.
  • Full-Range Adjustable Crossover Network: 12 dB/octave Butterworth crossover with selectable high-pass, low-pass, and full-range modes for accurate speaker system tuning.
  • Advanced Punch EQ Frequency Shaping: Provides variable bass and treble enhancement depending on crossover mode, allowing up to 18 dB low-frequency boost or detailed high-frequency adjustment.
  • Smart Protection LED System: Real-time monitoring displays power, thermal, and fault conditions to ensure safe operation and immediate system status feedback.
  • Flexible High-Level and Low-Level Inputs: Supports RCA or speaker-level signals with auto turn-on functionality for seamless integration with factory or aftermarket head units.
  • Efficient Plug-In Power Architecture: Quick-connect terminals support up to 8-gauge wiring with integrated remote output capability for daisy-chaining additional amplifiers or accessories.

 

Specifications:

  • RMS Power Output (Watts x Channels): 100 x 4
  • Peak Power Output (Watts x Channels): 290 x 2
  • Power at 2 Ohms (Watts x Channels): 100 x 4
  • Bridged Power (Watts x Channels): 200 x 2
  • Minimum Impedance Bridged: 4
  • Minimum Impedance Unbridge: 2
  • Minimum Impedance: 2
  • Best Frequency Response: 20-20000 Hz
  • THD at Rated RMS Power: 1%
  • Signal to Noise Ratio: 90 dB
  • Input Voltage: 14.4v
  • Amplifier Class: A/D
  • Low-Pass Crossover Frequency: 50-250 Hz
  • Low-Pass Slope (dB/octave): 12 dB/octave
  • High-Pass Crossover Frequency: 50-250 Hz
  • High-Pass Slope (dB/octave): 12 dB/octave
  • Bass Boost: 0-18 dB
  • Bass Boost Frequency :45 Hz
  • Fan Cooled: Yes
  • Fuse Rating: 60
  • Speaker Level Inputs: Yes
  • Preamp Outputs: No
  • Width (inches): 8-5/8
  • Height (inches): 1-5/8
  • Depth (inches): 4-5/16
  • UPC: 780687342388
  • Weight: 4
  • Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 2 Year(s) from the original date of purchase with proper return authorization.

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  • I just installed this amp and its very small, but packs a lot of power! My birth sheet said 136 rms on the front channels and 142 rms on the rear channels. The box said 100s at 4 and 2 ohm. It has that constant power technology similar to the BDCP amps from Rockford. I have 2 sets of t1 6x8's in my ford five hundred, and I'm pushing them with 50+ watts over what the speakers are rated at (80rms) they sound great with no distortion. The clipping indicator works great! It makes setting your gains properly easy as hell. No engine noise. Clean signal. Tons of power. This amp is worth the price.

    Jay
    10/14/2014
free installation

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