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Rockford Fosgate Power T400-2

2-channel car amplifier
120 watts x 2 (New Stock)

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  • Rockford Fosgate Power T400-2

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Our take on the Rockford Fosgate Power T400-2

by Buck Pomerantz
Rockford Fosgate

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Rockford Fosgate's Power Series Amplifiers

Rockford Fosgate has a well-deserved reputation for building high-quality mobile audio products. Their Power Series amps occupy the top of the amplifier food chain, with fine-tuned audio controls, extreme durability, and proprietary technologies that deliver stronger, more reliable performance than most other amplifiers on the market today.

High-grade internal components mean high-power output.

Even heat dispersal for longer life

Dynamic Thermal Management

Power Series amps use Rockford Fosgate's patented, award-winning "Dynamic Thermal Management," a 3-stage cooling system that uses forced air to dissipate heat evenly across the amp and out through the large heatsinks. This results in cooler internal components, higher efficiency, and lower distortion.

MEHSA cooling process

Maximum Efficiency Heat Sink Application increases heat transfer away from the transistors MEHSA is a Rockford Fosgate proprietary process that increases the heat transfer from the MOSFET devices to the heatsink. This allows the heat to escape more readily from the amplifier, so that the transistors stay cooler.


Extra-quiet inputs

Differential Inputs prevent noise from entering "Differential Input" circuitry helps eliminate any electronically induced noise or hum that could be picked up by the input cables, allowing only clean signals to enter the amplifier. You get more music with less heat and noise in a stylish package that's up to 40% smaller than previous models.


T400-2 Power performance

The T400-2 2-channel amplifier puts out 120 watts RMS into each channel — more than enough to drive a pair of full-range speakers or components to their musical peaks. Or you can bridge your T400-2 to blast 400 watts to a subwoofer or two. Either way, you can depend on clean, powerful sound from your Power Series amp. The Punch EQ circuit offers variable treble and bass boosts, so you can adjust your music for your car's listening environment.

T400-2 connections

Read more

Highlights:

  • 2-channel car amplifier
  • 120 watts RMS x 2 at 4 ohms (200 watts RMS x 2 at 2 ohms)
  • 400 watts RMS x 1 bridged output at 4 ohms (2-ohm stable in bridged mode)
  • CEA-2006 compliant
  • Dynamic Thermal Management cooling system
  • Differential Input circuitry eliminates hum
  • variable high- and low-pass filters (50-500 Hz, 24 dB/octave)
  • variable bass/treble boost (0-18 dB at 45 Hz, 0-12 dB at 12k Hz)
  • optional remote bass/treble boost (available soon)
  • Class AB amplifier design
  • MOSFET power and output stages
  • preamp inputs and outputs
  • 4-gauge power and ground leads and a 100-amp fuse recommended — wiring and hardware not included with amplifier
  • no on-board fuses — when installing multiple amps in a system, an additional 100-amp in-line fuse between the distribution block and the amplifier is recommended
  • 11-3/8"W x 2-1/4"H x 9-9/16"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Performance
RMS Power Output (Watts x Channels) 120 x 2
Peak Power Output (Watts x Channels) N/A
Power at 2 Ohms (Watts x Channels) 200 x 2
Bridged Power (Watts x Channels) 400 x 1
Minimum Impedance Bridged 2
Minimum Impedance Unbridged 1
Best Frequency Response 20-20k Hz
THD at Rated RMS Power 0.1%
Signal to Noise Ratio 85 dB
Input Voltage 14.4v
Features
Amplifier Class AB
Low-Pass Crossover Frequency 50-500 Hz
Low-Pass Slope (dB/octave) 24 dB/oct
High-Pass Crossover Frequency 50-500 Hz
High-Pass Slope (dB/octave) 24 dB/oct
Bass Boost 0-18 dB
Bass Boost Frequency 45 Hz
Fan Cooled No
Fuse Rating 100
Speaker Level Inputs No
Preamp Outputs 1 pair
Width (inches) 11-3/8
Height (inches) 2-1/4
Depth (inches) 9-9/16
Parts Warranty 2 Years
Labor Warranty 2 Years
Product Research
What's in the box?

Download owner's manual

  • 2-channel amplifier
  • Four 1-1/2" Self-tapping screws
  • Installation & Operation manual (English/ French/ Spanish/ German/ Italian)
  • Punch Amplifier Performance Verification Certificate
  • Optional PEQ remote EQ control information

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Controls
Connections

Features

Cast Aluminum Heatsink: The cast aluminum heatsink dissipates heat generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% improvement of cooling over conventional extrusion heatsink designs.

Dynamic Thermal Management (DTM): DTM Evenly distributes excess heat across entire amplifier heatsink.

MEHSA³ (Maximum Efficiency Heat Sink Application-Third Generation): MEHSA is a Rockford Fosgate proprietary process that increases the heat transfer from the MOSFET devices to the heatsink. The multi-layer insulated metal MEHSA substrate operates with minimal thermal resistance, spreading heat both downward and outward to quickly dissipate heat from each device across the heatsink. This allows greater power output, enhanced thermal stability, and maximum reliability.

Trans-ANA (TRANSconductance Active Nodal Amplifier): Trans-ANA is a circuit that allows the audio signal to pass through the amplifier at low voltage. The signal is directly level-shifted to the fixed high voltage rails via a pair of drive transistors. Signal linearity is assured by an active node formed by the drive transistors at ultrasonic frequencies. The result is crystal clear sound quality.

NOMAD (NOn-Multiplying Advanced Decision): NOMAD is an intelligent protection circuit that uses an analog computer to make real time decisions regarding temperature, voltage, current and impedance. The unit is protected without limiting sound output unless needed.

TO-247 MOSFET: The Power T400-2 utilizes ultra high performance MOSFET output devices, giving the amplifier more power handling capability as well as lower thermal impedance for more reliable operation, even under the harshest load conditions.

DSM (Discrete Surface Mount): In the manufacturing process high speed robotics are used to place 1% tolerance parts and large board traces. DSM improves the efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.

Power and Protection LEDs: The LEDs are located on top of the amplifier. A blue Power LED illuminates when the amplifier is turned on. A red Thermal LED illuminates if the amplifier overheats. The yellow Protect LED illuminates if a short circuit or too low an impedance is detected at the speaker connections. When any of the protection circuits engage, the amp automatically shuts down until the problem is corrected.

Controls

Internal Crossover: The amplifier's internal crossover has a 24 dB/octave slope. It's selectable for high-pass, all-pass (full range), or low-pass operation and is variable from 50Hz to 500Hz.

Punch EQ: Punch EQ works along with the crossover switch. When the crossover is set to low-pass, the Punch EQ acts as a variable bass boost; 0-18 dB at 45 Hz. When the crossover is set to high-pass, the Punch EQ acts as variable treble boost, 0-12 dB at 12 kHz. When the crossover is set to all-pass, both the bass and treble boost circuits are active.

Connections

Power Connections: The power and ground terminals are nickel-plated captive c-clamp wire connectors and will accommodate up to 4-gauge wire. An external 100-amp fuse (not included) must be installed on the power wire. The remote turn-on terminal will accept wire sizes of 12- to 24-gauge. A Phillips-head or slotted screwdriver (not supplied) is required to tighten/loosen the terminals.

Speaker Connections: The 2-channel nickel-plated clamp wire connectors will accept 8-gauge to 18-gauge wire. A Phillips-head or slotted screwdriver (not supplied) is required to tighten/loosen the terminals.

Remote Punch EQ (PEQ) Connection: An RJ-45 jack is provided for connecting an optional remote PEQ control (575ROCKPEQ, sold separately). If you use the remote PEQ, the Punch EQ control on the amp is disabled, and replaced by the remote. Note: Previous model Punch Bass and Para-Punch remotes will not work with this amp.

 
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Rockford Fosgate Power T400-2 Reviews

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Filter by rating:
5 out of 5

Rockford T400

Written By Javier, Texas on Tuesday, December 31, 2013
 
Very clean dependable amp got it pushin a Polk Dxi 12 bridged at 4 ohms. Fits nicely under the seat. I really need to add another sub since there's power to spare. I only have the gain halfway up. Nothing else compares with these series of Rockford amps. T1000 here I come!
Pros:
Everything
Cons:
Can't think of one
Was this review helpful?    Yes | No
 
5 out of 5

This amp is awesome

Written By Devin, Pocatello, ID on Saturday, August 14, 2010
 
I have this amp running to a JL 12W3v3-4 and it slams. It replaced a 480 watt rms (supposedly) amplifier. It pushes the sub so much harder and cleaner. Plenty of power for the 500 watt rms subwoofer. Birth sheet is much higher rms power too.
4 out of 4 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Rockford Fosgate! Still living up to its name

Written By matt, hawaii on Thursday, August 13, 2009
Crutchfield Customer Review (What's this?)
 
Awsome Amp! Got it pushing a single Rockford PS3 subwoofer. Very under rated amp. Dynamic power is 517rms bridged at 4ohm. Worth your $$$$.
Highly recommended to push subs.
3 out of 3 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Awesome AMP!!

Written By Christopher, Heidelberg, Germany on Thursday, October 30, 2008
Crutchfield Customer Review (What's this?)
 
This is one of the best AMPs I have ever owned!! Has great power! Well worth every penny!
3 out of 6 people found this helpful
Was this review helpful?    Yes | No
 

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For a more in-depth review and enhanced detailed information on the Rockford Fosgate Power T400-2, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_575T4002P/Rockford-Fosgate-Power-T400-2.html ).

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