Get maximum performance from your system

AudioControl designed the DQXS for one reason — to make your car audio system sound better. This 6-channel equalizer features 130 bands of adjustment, along with two parametric EQs per channel and an 8-channel crossover, for some serious sonic fine tuning. Plus, you can store your favorite system settings in eight different memory locations that won't go down when you lose power.

System diagram

Easy to set up, easy to use

The DQXS features 6-channel inputs and 8-channel outputs, fitting between your receiver and your amplifiers in the signal chain. Once connected, the DQXS makes it easy — turn up the input gain knobs until the "Maximized" indicator flickers, adjust the output knobs until you reach the desired output, and you're all set. You can adjust the output level up to 7.5 volts, so you can maximize the performance of any amplifier.

Kill those sonic peaks and valleys

Car interiors present a unique set of problems caused by poorly-placed speakers, reflective surfaces, and absorbent materials. The DQXS allows you to tweak the sound in your vehicle to your ear's content. You'll get precise, digital control with thirty graphic EQ filters for the front channels, nineteen EQ filters for the rear, and sixteen for the subwoofer. Six programmable parametric equalizers allows you to zero in on trouble spots on each channel, great for eliminating tweeter blare or subwoofer boom.

8-channel crossover offers flexibility

Optional controller

The built-in crossover allows you to use the DQXS in a variety of car audio systems, from a traditional front/rear/sub setup to a 3-way system with subs, midbass or midrange speakers, and tweeters. You can also program the subsonic filter to remove bass below the range of human hearing that can hamper your system's power and performance. Use AudioControl's optional DDC dash-mount digital controller to adjust the DQXS from your driver's seat.

Information provided by AudioControl


Product Highlights:

  • silver 6-channel digital equalizer with 8-channel crossover
  • six 30-band mono equalizers, plus six 2-band parametric EQs
  • 8-channel Linkwitz-Riley crossover (front high-pass, front low-pass, rear, and subwoofer)
  • 24-bit analog-to-digital and digital-to-analog converters
  • 6-channel inputs and 8 outputs (with level controls)
  • top-mounted controls for easy adjustment
  • balanced inputs eliminate noise (switchable to unbalanced)
  • front channels (1/3 octave from 25 to 20000 Hz); rear channels (1/2 octave from 32 to 16000 Hz); sub (1/3 octave from 25 to 500 Hz)
  • 2 bands of parametric equalization per channel (adjustable from 25 to 20,000 Hz)
  • frequency response: 10 to 22,000 Hz
  • signal-to-noise ratio: 105 dB at full output
  • maximum output level: 7.5 volts
  • fuse rating: 2 amps
  • size: 7-1/4"H x 11"W x 1-1/4"D
  • weight: 4-1/2 pounds
  • warranty: 5 years
  • Our 60-day money-back guarantee

AudioControl DQXS Reviews

Average Customer Review:

3 reviews
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Well worth every dollar

Written By Mo, Springfield, IL on Saturday, November 16, 2013

I installed this in a high spl vehicle and sounded very nice previously with a regular 3 way crossover and active 4 way setup. I was immediately able to tell a big difference in stereo seperation and after spending a few days fine tuning it (Yes a few days, because I did not have an RTA frequency response analyzer and I just went by ear), I must say the results were amazing. I could hear everything in any type of music. By this I mean every instrument was disguishable. As an ex installer for over 20 years, I must say this is one fantastic processor.

Pros: Makes any type of music sound so much better and more lively. 7V Line driver built in as well.

Cons: The DDC remote controller buttons are a bit flimsy since they are rubber. RTA required to correctly setup or if you have a well trained ear then have at it, otherwise professional setup is a must. This is not your everyday crossover / dsp! TONS of adjustments which can easily make things sound very crappy fast if not tuned right.

How many crossover points?

Written By hifonix, Greenville, NC on Tuesday, July 17, 2012

Crutchfield Customer Review (What's this?)

This thing is amazing. You can sculpt your sound any way you want it. Way over my head as far as setup went. I would say have a PRO install and tune for you. Well worth every penny once configured correctly. I listen to alot of metal so a crossover/eq was a must have to keep vocals and solo's inline with each other. I was tired of redoing my stereo trying to get the sound I wanted out of what I had, so sold everything and bought top shelf componets polk speakers, jl audio sub and amps, and this the crown of my system. Hard to put into words what this will do for your system. Well worth the money. The flexibility this offers is unparrelled.

Pros: Does exactly what is says it will.

Cons: You may need a PRO shop to tune it for you, but once that is done (correctly) the sound you will have is amazing.


Written By TurnHeading360, Tampa, FL on Friday, August 19, 2011

Crutchfield Customer Review (What's this?)

I'm speechless...

My jaw is dropped...

Just recieved a trophy...(citation)

Oh my!

This, lady's and gentlemen, is by far the best thing I've ever invested in...EVER!

Hands-on research

What's in the box?

Download owner's manual

  • 6-Channel Equalizer/8-Channel Crossover
  • Owner's manual
  • QC checklist
  • Product registration card

Product Research


Crossover: Each of the 4 sets of line outputs has its own crossover. The slope of the crossovers is 24 dB/octave and the available crossover point options vary based on how the input mode is set:

  • 2-Channel: the front input feeds the front high-pass, front low-pass, and subwoofer outputs; the crossover point for each is independently adjustable as follows:
    • Front High-pass: from 140 Hz to 8 kHz
    • Front Low-pass: from 15 Hz to 90 Hz
    • Subwoofer Low-pass: from 28 Hz to 1 kHz
  • 4-Channel: the front input feeds the front high-pass, front low-pass, and subwoofer outputs, the rear input feeds the rear high-pass output; the crossover point for each is independently adjustable as follows:
    • Front High-pass: from 140 Hz to 8 kHz
    • Front Low-pass: from 15 Hz to 90 Hz
    • Rear High-pass: from 15 Hz to 8 kHz
    • Subwoofer Low-pass: from 28 Hz to 1 kHz
  • 6-Channel: the front input feeds the front high-pass and front low-pass outputs, the rear input feeds the rear high-pass output, and the subwoofer input feeds the subwoofer outputs; the crossover point for each is independently adjustable as follows:
    • Front High-pass: from 140 Hz to 8 kHz
    • Front Low-pass: from 15 Hz to 90 Hz
    • Rear High-pass: from 15 Hz to 8 kHz
    • Subwoofer Low-pass: from 28 Hz to 1 kHz

Subsonic Filter: The subsonic filter crossover point is adjustable; there are 24 frequency options from 15 Hz to 56 Hz. The crossover slope is 24 dB/octave.

Equalizer: Each set of outputs (front high/front low, rear, and subwoofer) has its own graphic equalizer. In each band, both channels (left and right) can be adjusted simultaneously or individually. Each line output also has two programmable parametric EQ bands with adjustable width (1/12, 1/6, 1/3, 1/2, 1, 2, or 3 octave). The adjustment range is +/-12 dB in 1 dB increments.

  • Front: The front graphic EQ has 30 bands from 25 Hz to 20 kHz in 1/3 octave steps. There are 59 bands from 25 Hz to 20 kHz in 1/6 octave steps for the two parametric EQ bands. (When using both the front high-pass and front low-pass outputs, which is affected by a given EQ band depends on the crossover point selected)
  • Rear: The rear graphic EQ has 19 bands from 31.5 Hz to 16 kHz in 1/2 octave steps. There are 59 bands from 25 Hz to 20 kHz in 1/6 octave steps for the two parametric EQ bands.
  • Subwoofer: The subwoofer graphic EQ has 16 bands from 25 Hz to 800 Hz in 1/3 octave steps. There are 33 bands from 25 Hz to 1 kHz in 1/6 octave steps for the two parametric EQ bands.

User Memory: There are eight memory presets to save equalizer curves; the memory is non-volatile, so it isn't lost if the battery is disconnected or runs dead.

Balanced Input: Using the balanced differential input circuit on the auxiliary input cancels noise picked up in the transmission line between the DQXS and the source unit. The input can be set to balanced or unbalanced if needed.

Input Gain: The input gains for the 3 pair of line inputs are set independently. You can boost or cut the signal to match the source output to the DQXS input.

Output Level: The adjustable output levels allow you to increase the head unit's line voltage to the top of your amp's input range; up to 7.5 volts RMS. The output level is adjusted independently for each of the 4 pair of line outputs.

DDC Input: A wired Digital Dash Control (item number 161DDC) can be added to the DQXS, giving you remote control of all the menu functions.

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 Block: The power/ground/remote terminal is removable; the wiring is attached to the terminal block, then the block is plugged into the DQXS. The terminal block will accommodate wire up to 12 gauge.


  • Maximum Input Voltage: 7.5 volts RMS
  • Maximum Output Voltage: 7.5 volts RMS
  • Frequency response: 10Hz-22kHz
  • THD: 0.01%
  • S/N Ratio: 105 dB
  • Balanced Input Noise Rejection: 60 dB
  • Input Impedance: 20 kΩ
  • Output Impedance: 150 Ω
  • Crossover Slope: 24 dB/octave
  • Subsonic Filter Slope: 24 dB/octave

Our Product Research Team

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