Hit the road to intense sound with an Audiobahn amplifier. Lightning-fast MOSFET power supplies pump the power to your speakers for crisp, accurate reproduction. Make your full-range speakers sing with the 4-channel A4601Q amplifier. Its 75-watt RMS output is enough juice for almost any system. Or bridge two channels and feed your 4-ohm subwoofer 210 watts of power.

Audiobahn puts the sound control in your hands. Variable high-pass and low-pass crossovers make for versatile sound-tuning. The 18 dB bass boost adds a serious punch to the low end, while the subsonic filter blocks power-sucking inaudible low frequencies.

The digital voltmeter lets you keep an eye on power levels. The built-in cooling fan kicks on when the amp is powered up and stays busy pulling the heat out of the amp to maintain safe operating temperatures.

Details:
  • 75 watts RMS x 4 at 4 ohms
  • 105 watts RMS x 4 at 2 ohms
  • 210 watts RMS x 2 bridged output
  • 2-, 3-, or 4-channel output
  • Tri-way capable (Tri-Way crossover required)
  • MOSFET power supplies
  • requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
  • high-pass (50-750 Hz)/low-pass (50-120 Hz) crossovers, 18 dB/octave
  • selectable 18 dB bass boost at 50 Hz
  • variable (20-50 Hz) subsonic filter
  • preamp outputs
  • cooling fan
  • cobalt blue illumination
  • digital voltmeter
  • 13-11/16"W x 2-1/4"H x 12-3/4"D
  • 1-year warranty

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

  • Chrome-plated 4-channel amplifier with two 20-amp blade fuses
  • One 1/8" Allen wrench
  • One 3/32" Allen wrench
  • Four 7/8" mounting screws
  • 1 Pair of white gloves
  • 1 Audiobahn window sticker
  • Operating instructions
  • Product registration and warranty book

Product Research

Features
Controls
Inputs and Outputs
Specifications

Features

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

High Gloss Chrome-Plated Finish: This amplifier has a high-gloss chrome-plated finish on the top and on all sides.  A pair of white cotton gloves is included with the amplifier to prevent finger-print smudges when handling and mounting the amp.

Digital Voltmeter: On the top of this amplifier is a digital voltmeter with cobalt blue illumination.  The interior circuit board illuminates as well.

Cooling Fan: There is a built-in cooling fan on the top of this amplifier, which is activated whenever the amplifier receives a signal from the remote turn-on lead. If the remote turn-on lead is connected to your radio, then the cooling fan will run whenever your radio is turned on.  The amplifier will shut down if the internal temperature reaches 158 degrees F.

Variable Subsonic Filter: A subsonic (infrasonic) filter allows you to filter out extremely low bass frequencies that may rob power from frequencies that the system can reproduce without distortion. Use of the infrasonic filter allows better amplifier efficiency and better audible sound.  The subsonic filter in this amplifier is continuously variable from 20Hz to 50Hz.

Soft-Start Circuitry: The amplifier automatically turns on a few seconds after you turn your vehicle's ignition switch to ACC or ON.  The power indicator on the side of the amplifier lights when the amplifier is on.

Terminals: The amp has nickel-plated, heavy-duty set screw terminals.

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

Controls

Left Side of Amplifier

  • Front and Rear Variable Gain Controls: these rotary controls allow you to match the input sensitivity of the amp to the particular source unit you are using
  • Front and Rear Subsonic Frequency Controls: these rotary controls allow you to filter out unwanted bass frequencies. The subsonic filter in this amplifier is continuously variable from 20Hz to 50Hz.
  • Front and Rear High-pass Frequency Control: these rotary controls allow you to adjust the frequency of the high-pass crossover from 50Hz to 750Hz
  • Front and Rear Low-pass Frequency Control: these rotary controls allow you to adjust the frequency of the low-pass crossover from 50Hz to 120Hz
  • Front and Rear Crossover Switch: lets you select high-pass, low-pass or full-range operation for the speaker outputs
  • Front and Rear Bass Boost Switch: lets you select either OFF or +18dB, centered at 45Hz
  • Front and Rear Subsonic Frequency Switch: lets you turn the subsonic filter on or off

Inputs and Outputs

Right Side of the Amplifier

  • Line-In: two sets of left and right RCA input jacks
  • Line-Out: RCA preamp output jacks, which allow you pass full-range signals from this amplifier to another amp in a daisy-chain configuration.
  • Speaker Terminals: four +/- pairs of nickel-plated set screw terminals (each terminal is 0.25" wide)
  • BATT (power): nickel-plated set screw terminal (accepts 4-gauge wire)
  • GND (ground): nickel-plated set screw terminal (accepts 4-gauge wire)
  • REM (remote turn-on): nickel-plated set screw terminal (terminal is 0.31" wide)
  • Fuses: two 20-amp fuses

Specifications

Continuous Power Rating (measured at 14.4V):

  • Bridged Into A 4-Ohm Load: 210 watts x 2
  • Per Channel Into A 2-Ohm Load: 105 watts x 4
  • Per Channel Into A 4-Ohm Load: 75 watts x 4

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.

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Get everything you’ll need to enjoy your new Audiobahn A4601Q

Patch cables take the music from your stereo to the amplifier. Most amp wiring kits don't include them.
EFX 2-Channel RCA Patch Cables

EFX 2-Channel RCA Patch Cables

Core Series Twisted RCA patch cables — available in 5 different lengths (6-foot)

Item #: 142RCT6B

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EFX 2-Channel RCA Patch Cables

EFX 2-Channel RCA Patch Cables

Reference Series Multi-Core RCA patch cables — available in 5 different lengths (12-foot)

Item #: 142RR12

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EFX 2-Channel RCA Patch Cables

EFX 2-Channel RCA Patch Cables

Elite Series Braided Multi-Core RCA patch cables — available in 5 different lengths (3-foot)

Item #: 142RE3

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T-Spec 2-Channel RCA Patch Cables

T-Spec 2-Channel RCA Patch Cables

Available in 7 different lengths (10-foot)

Item #: 120RCA102

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