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AudioControl THREE.2

In-dash equalizer with crossover and line driver

Item # 161THREEP2

The THREE.2 offers front and rear outputs for your full-range or component speakers, maintaining front-to-rear...

The THREE.2 offers front and rear outputs for your full-range or component speakers, maintaining front-to-rear...

Item # 161THREEP2

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About the AudioControl THREE.2

Buck Pomerantz

Expand your system's sound

The THREE.2 offers front and rear outputs for your full-range or component speakers, maintaining front-to-rear fader capability for greater depth to the soundstage. The subwoofer channel also features a 24 dB/octave crossover and its own level control.

Expand your system's sound

Sometimes old school is cool. AudioControl's THREE.2 is an in-dash equalizer and a whole lot more, allowing you to control almost every aspect of your receiver's output from the driver's seat. It starts with three bands of equalization — high, midrange, and midbass — and then adds a fourth band, called Para-BASS®, that'll fine-tune the low frequencies to get the bass popping the way you like. Front and rear auxiliary inputs let you plug in a couple of outside music sources like a satellite radio receiver and your iPod®.

System diagram

System controller

The THREE.2 offers front and rear outputs for your full-range or component speakers, maintaining front-to-rear fader capability for greater depth to the soundstage. The subwoofer channel also features a 24 dB/octave crossover and its own level control.

Get maximum punch from your amps

AudioControl knows all about noise elimination and signal level matching too, so the THREE.2's got adjustable input gains with an LED indicator to tell you when it's perfectly matched with the signal coming from your receiver. The THREE.2 also functions as a line driver/preamp — the master volume knob lets you boost the signal up to the level that your amplifiers need to play at maximum efficiency, even through long wire runs. And just for fun, you can set the knob illumination color to hot red or cool blue.

Information provided by AudioControl


Product highlights:

  • preamp/equalizer and subwoofer crossover
  • 3-band EQ: +/-12 dB at 125, 1,250, and 10,000 Hz
  • Para-BASS EQ: +/-12 dB at 40-80 Hz
  • 2-way Linkwitz-Riley crossover (24 dB/octave at 90 Hz)
  • line driver increases output up to 9.5 volts RMS (13 volts peak)
  • front and rear panel auxiliary inputs
  • switchable balanced/unbalanced preamp inputs help eliminate noise
  • front, rear, and subwoofer outputs
  • hot red or cool blue illumination
  • 6-13/16"W x 1-1/16"H x 6-5/8"D
  • mounting brackets included
  • warranty: 5 years
  • Our 60-day money-back guarantee
  • MFR # 841-060-2

What's in the box:

  • Pre-amp line driver/EQ/crossover
  • 2 Mounting brackets
  • 4 Mounting screws
  • Owner's manual
  • QC checklist

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Crutchfield response

<< >>

More details on the AudioControl THREE.2

Russ B.
The AudioControl THREE.2 replaces these items:

Product Research


Description: The THREE.2 is a combination equalizer/preamp/crossover/line driver. The 1/2 DIN chassis can be mounted in-dash, or under-dash using the included brackets.

3 Band Graphic EQ: The rotary knobs adjust the signal +/-12 dB at 125 Hz, 1.25 kHz, and 10 kHz. There's a notch at each knob's center position so it's easy to return to the flat setting.

Para-Bass: Para-Bass is a single band, parametric equalizer for the bass output. Like the three graphic EQ bands, the adjustment range is +/-12 dB; the center frequency is continuously variable from 40 Hz to 80 Hz.

Crossover: The THREE.2 has built-in high-pass and low-pass crossovers. The high-pass is applied to the front and rear line outputs. The low-pass is applied to the subwoofer output. The crossover slope is 24 dB/octave and the factory crossover point is 90 Hz; the crossover point is governed by a replaceable chip; replacement chips range from 30 Hz to 3,500 Hz. The crossover can also be bypassed if you're not using a subwoofer, sending a full range signal to the front and rear outputs.

Line Driver: To achieve the best possible signal to noise ratio and dynamic range, the built-in line driver can increase the head unit's output voltage up to 20 dB (up to 9.5 volts RMS/13 volts peak).

Volume: If you choose, you can adjust the system volume using the THREE.2's volume knob. This allows you to leave the source volume at it's maximum un-clipped level, resulting in the best signal to noise ratio and dynamic range output from the source.

Subwoofer Level Control: The relative subwoofer volume is adjusted using the rotary Sub Level control on the front panel.

Fader: Because there is only one stereo line input and both front and rear line outputs, the front panel fader knob is needed to adjust the relative front and rear volume.

Auxiliary Inputs: The THREE.2 has two auxiliary inputs, 3.5mm mini-jacks on the front and rear panels. When a cable is plugged into the front panel input, it overrides the rear panel input. The front panel Source button switches between the auxiliary inputs and the RCA line input.

Input Gain: The input gain for the left and right channels is set independently; 0 dB to +20 dB. The +20 dB gain allows you to increase the head unit's line voltage to the top of your amp's input range; up to 9.5 volts RMS/13 volts peak. A yellow Maximized LED starts to flicker as you reach the maximum unclipped voltage.

Balanced Input: Using the balanced differential input circuit may cancel noise picked up in the transmission line between the THREE.2 and the source unit.

Ground Isolation: The power supply ground is switchable, in case of ground loop noise. The factory position is fully isolated (typically the best choice), but can be changed to Ground or 200Ω.

Terminal Blocks: The power/ground/remote/illumination terminal is removable; the wiring is attached to the block, then the block is plugged into the rear panel of the THREE.2.

Illumination: The outer ring of each knob is lit whenever the illumination terminal is energized. The color is switchable between blue and red. Wiring the illumination terminal to a dimmer circuit allows you to adjust the brightness.


  • RCA main input; rear panel
  • Auxiliary 3.5mm mini-jack; rear panel
  • Auxiliary 3.5mm mini-jack; front panel


  • Front outputs; RCA; rear panel
  • Rear outputs; RCA; rear panel
  • Subwoofer outputs; RCA; rear panel

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Customer Q&A

4 questions already asked

Are the dimensions listed anywhere?
[ STEVE  Jan 04, 2022 ]
1 answer
Yes on the spec sheet but you can also check the audio control website and they will have it as well
[ JOSE  Jan 04, 2022 ]
Is this compatible with the Sony XAV7000 running on a stock speaker system? I'd just like to be able to fine tune on the fly in between drastic switches in both recordings and genres...
[ Astrocreep  May 14, 2021 ]
1 answer
This is for use with an aftermarket amplifier as the outputs are all line level. This would not allow the EQing of the stock speakers.
[ Thomas  Jun 03, 2021 ]  Staff
Can I connect this to my Stock radio that has no RCA outputs?
[ JOSE LUIS  Feb 15, 2020 ]
1 answer
Jose...under the circumstances, I don't see how it could possibly work. Your radio doesn't have RCA type outputs and the Audio Control part doesn't have connections for speaker level inputs. No can do, Jose. Crutchfield also has a nice selection of radios and head units featuring some very useful RCA type outputs for expanding your system. Check it out !
[ DANIEL  Mar 16, 2020 ]
How will a head unit with two or more pairs of preamp outputs connect to the Audiocontrol Three.2, seeing as there is only one input? Does the "front" preamp output transmit a full signal?
[ joegz  Oct 15, 2017 ]
1 answer
Sure. Using the "Front" RCA pre-amp outputs of the stereo is most common. These outputs should provide a full range signal on most any aftermarket stereo model. I hope that helps. My Bio:
[ Ryan  Oct 20, 2017 ]  Staff

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