If you want Audiobahn performance in a smaller package, check out the Intake series amps! A built-in air intake and a cooling fan ensures that these compact workhorses will stay cool through hours of heavy use. The 2-channel A4002T pumps out 100 watts RMS per channel of MOSFET-fueled Class AB power to your speakers, or 400 watts in bridged mode for your subwoofer.

You get the precise sonic control that you expect from Audiobahn. Variable high- and low-pass crossovers trim unwanted frequencies to adapt the amp for a variety of applications. You can improve the efficiency of your speaker system by adjusting the subsonic filter (variable from 20 to 50 Hz) to block low frequencies that your speakers can't reproduce. Switch on the bass boost to bring on a bass-quake!

Like to be in control? The optional remote-mount digital voltmeter lets you keep an eye on power levels from the driver's seat, while the optional wired remote bass boost provides variable control over your low-frequency punch.

Product Highlights:

  • 100 watts RMS x 2 at 4 ohms
  • 200 watts RMS x 2 at 2 ohms
  • 400 watts RMS x 1 bridged output
  • stereo or bridged mono output
  • Tri-way capable (Tri-Way crossover required)
  • MOSFET power supply
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 40-amp fuse
  • 50-750 Hz high-pass/50-120 Hz low-pass crossover, 18 dB/octave
  • 18 dB bass boost at 50 Hz (switchable on/off)
  • variable (20-50 Hz) subsonic filter
  • preamp outputs
  • cooling fan
  • cobalt blue illumination
  • speaker- and preamp-level inputs
  • 11-5/16"W x 2-3/8"H x 10-7/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

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.

Hands-on research

What's in the box?

Download owner's manual

  • 2-channel amplifier with one 40-amp fuse inserted into the chassis
  • One 11" speaker-level input harness
  • One 3mm Allen wrench
  • One 3/32" Allen wrench
  • 4 Self-tapping screws
  • 2 White gloves
  • Operating Instructions
  • Warranty Information/Product Registration Card
  • One 11-3/4" x 3-3/4" window sticker
  • One 12-1/4" x 1-1/2" window sticker
  • Transworld MOTOcross subscription special offer

Product Research

Inputs and Outputs Notes


Class A/B MOSFET Power Amplifier: This is a Class A/B amplifier that uses MOSFET devices for its amplification stage and power supply.

High-gloss Chrome-plated Finish: This amplifier has a high-gloss chrome-plated finish. A pair of white cotton gloves is included with the amplifier to prevent fingerprint smudges when handling and mounting the amp.

Cooling Fan: This amp has a built-in air intake and a cooling fan on top, ensuring cool, reliable operation.

Variable Subsonic Filter: The subsonic filter (variable from 20Hz to 50Hz) allows the amplifier to block ultra-low frequencies that your speakers can't reproduce, improving the efficiency of your speaker system.

Internal Crossover: The internal crossover can be set for low-pass, high-pass, or full-range operation. In low-pass mode, the crossover is adjustable from 50Hz to 120Hz. In high-pass mode, the crossover is adjustable from 50Hz to 750Hz. In both modes, the crossover has a slope of 18dB/octave.

Bass Boost: The bass boost switch allows you to select a +18dB gain in bass output, centered at 50Hz. If you connect the optional ABR-100T remote bass boost control, the gain is adjustable from 0dB to +18dB.

Soft-Start Circuitry: The amplifier automatically turns on a few seconds after you turn your vehicle's ignition switch to ACC or ON. 

Optional Digital Voltmeter: This amp can be used with an the optional ADM-100T remote-mount digital voltmeter.

Protection Circuitry: This amp has the following protection circuitry:

  • Thermal: shuts off the amp when the operating temperature is too high
  • Input Overload: shuts off the amp as a result of low voltage or over-voltage
  • Short Circuit: shuts off the amp due to speaker or DC short

Inputs and Outputs Notes

Front of Amplifier:

  • Speakers: set screw terminals that can accept up to 8-gauge wire
  • BATT (power): set screw terminal that can accept up to 4-gauge wire
  • GND (ground): set screw terminal that can accept up to 4-gauge wire
  • REM (remote turn-on): set screw terminal that can accept up to 8-gauge wire

Back of Amplifier:

  • DVM: phone-type jack for use with optional remote-mount digital voltmeter
  • Remote: phone-type jack for use with optional remote bass boost control
  • High Input: 5-pin male jack for use with supplied speaker-level input harness

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 verify what’s in the box, 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.

Audiobahn A4002T Reviews

Average Customer Review:

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great power for the price

Written By BenH, Arab, AL on Thursday, November 24, 2005

i have this little amp hooked up to my front infinity kappa 62.5i speakers. this thing makes them scream. excellent highs with the hpf on, great clarity and no distortion. it was too much for the speakers though, i had it cranked for about 45 minutes straight and something went out on them, so i have to replace them now. but with this amp and the a8002 next to it on my backseat makes the back of my rodeo look great. the lights make the entire cargo area glow the cobalt blue. plus the polished finish really looks nice. its a great little amp, but be careful if youre not hooking up subs, make sure your speakers can handle the power.

Best amp I have used

Written By Russell, Vancouver, Washington on Sunday, May 22, 2005

This amp replaced a MTX 404 that I have hooked-up to two Alpine type E's, in a ported Q-logic box. I drive a 95 camry and still can't get over the fact I have the gain set to about 35% to 25% and I can shake my car while listening to drum and bass with my sony deck set to -8db on the sub output and 25 on the volume. The first road trip that I took my ears were ringing for 3 days. If you buy this amp do us all a favor and buy some sound damping so I don't here that annoying rattle two block away. ;)

OH! .........MY ACHING HEAD!!!!!!!!!!!!!!!

Written By Anonymous, Lake MS. on Wednesday, March 16, 2005

Anybody who has a problem with this amp. clearly has a weak link somewhere else. 400 watts? no way! This little marvell is 600 w easy bridged.This is THE best $200 amp. i've ever used in an installation.I install a lot of car audio as a side job. I was so impressed, I baught one for myself. The sub sonic filter gets rid of those annoying frequencies you can't hear anyway,that just distort the audible frequencies. I was amazed at the correctness of the cut off of the crossover circuit. An 18 db crossover slope is clearly superior to 12 . A word of caution though.Do not buy a sub capable of less than 400w continuous. This amp will kill them!

Get everything you’ll need to enjoy your new Audiobahn A4002T

Patch cables take the music from your stereo to the amplifier. Most amp wiring kits don't include them.
Have your new amplifier put in by a qualified professional in your area.
EFX 2-Channel RCA Patch Cables

EFX 2-Channel RCA Patch Cables

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T-Spec 2-Channel RCA Patch Cables

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