Skip Navigation

AudioControl DQL-8

Digital processor with 8-channel line output converter

Find what fits your vehicle


Can't find your exact vehicle?

Item # 161DQL8

This item is no longer available.

Shop all Signal Processors


Our take on the AudioControl DQL-8™

The DQL-8 features eight speaker-level inputs that let you connect amplified signals, including multi-wire cables from Bose® and other premium factory systems rated up to 400 watts. Six high-quality RCA preamp outputs send a strong signal to your amps. Add an iPod, satellite radio, or other source to the RCA auxiliary input for even greater flexibility.

Add amps, speakers, and subs to any factory system

AudioControl's DQL-8 processor allows you to add aftermarket amps, speakers, and subs to your factory radio, and to tune your new system for maximum sound quality. It accepts speaker-level signals from your factory radio or amplifier, so you can use it with any system. And the DQL-8's auxiliary input allows you to connect an iPod®, satellite radio, or other portable player to your setup.

System diagram

Inputs and outputs

The DQL-8 features eight speaker-level inputs that let you connect amplified signals, including multi-wire cables from Bose® and other premium factory systems rated up to 400 watts. Six high-quality RCA preamp outputs send a strong signal to your amps. Add an iPod, satellite radio, or other source to the RCA auxiliary input for even greater flexibility.

Level matching is a breeze

Just adjust the input level controls until the "Input Maximized" indicators begin to flicker, then adjust the output level controls to match your amplifier's recommended gain levels. You've just matched your levels, so you can count on getting maximum performance and minimum noise from your amp setup.

Fine-tune your sound

You can 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. AudioControl also builds in a 2-way electronic crossover that splits the signal between your subs and full-range speakers.


Optional controller

The optional dash-mount controller allows you to tune your system on the go. Speaker-level inputs sense incoming signals and turn on the DQL8 automatically, while a built-in 12-volt trigger tells your amps or other gear to turn on.

Subsonic noise filter

The Programmable Frequency Match filter rolls off the ultra-low bass in your system, so your amps and subs will play louder and cleaner. You can reprogram this subsonic filter according to the tuning frequency of your subwoofer setup.

Information provided by AudioControl

AudioControl chart

Product Highlights:

  • 8-channel line output converter/processor
  • designed to work with any factory stereo
Inputs and outputs
  • 8 high-level inputs with up to 400 watts RMS power handling
  • 6-channel preamp level outputs (front high-pass, rear high-pass, and subwoofer channels)
  • auxiliary input
  • subwoofer level control
Equalization features
  • 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)
  • two additional parametric EQs per channel
  • 8 customizeable memory presets
Other features
  • signal-sensing turn on
  • 12-volt turn-on lead output
  • internal signal summing
  • recommended fuse rating: 2 amps
  • 12-5/16"W x 1-1/4"H x 7-1/4"D
  • 4.2 pounds
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • 8-Channel line output converter/EQ/Crossover
  • Remote dash mount control
  • 20' RJ-14 cable
  • Adhesive backed remote label
  • Owner's manual
  • QC checklist
  • Product registration card

Hands-on research

Product Research


Equalizer: Each of the line outputs (front, 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 for the two parametric EQ bands.
  • 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 for the two parametric EQ bands.
  • Subwoofer: The subwoofer graphic EQ has 14 bands from 25 Hz to 500 Hz in 1/3 octave steps. There are 33 bands from 25 Hz to 1 kHz for the two parametric EQ bands.

User Memory: There are eight memory presets to save equalizer curves, four for the main inputs and four for the auxiliary input. The memory is non-volatile, so it isn't lost if the battery is disconnected or runs dead.

Crossover: Crossover points for the front, rear, and subwoofer outputs are set independently. The front and rear high-pass crossovers offer 108 frequency options from 15 Hz to 8 kHz; the low-pass sub crossover offers 54 frequency options from 48 Hz to 1 kHz. The slope of all three crossovers is 24 dB/octave.

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.

Speaker Input: The speaker level inputs are compatible with nearly any factory stereo system, even most Bose systems. There are 4 pair of inputs that will accommodate up to 400 watts.

Channel Summing: The DQL-8 has the ability to sum together multiple input channels (4, 6, or 8) from the factory source unit into 2 channels. This is handy when the factory system has multiple, actively crossed-over signals sent from the source unit or amplifier(s). For example, in some vehicles there is an actively crossed-over tweeter, midrange, and woofer all in the front of the vehicle. The DQL-8 lets you take all of those signals and sum them together to get a high-quality, full-range, pre-amp signal without the use of any additional cables or hardware.

AutoMode Inputs: When there is no signal present at the channel 4 input, the channel 3 input automatically feeds the channel 3 and channel 4 outputs.

Auxiliary Input: There is a pair of RCA auxiliary input jacks on the unit so you can easily add an iPod, satellite radio, or other secondary source. The aux input is engaged by pressing the knob on the wired remote.

Balanced Input: Using the balanced differential input circuit on the auxiliary input cancels noise picked up in the transmission line between the DQL-8 and the source unit. The input can be set to balanced or unbalanced if needed.

Input Gain: The input gains for the 4 pair of speaker inputs and the auxiliary input are set independently. You can boost or cut the signal to match the source output to the DQL-8 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 3 pair of line outputs.

Auto Turn-on: The main speaker level input has a signal sensing circuit; the unit turns on when there's a speaker level input signal and turns off when the signal disappears.

Remote Output: The +12 volt DC remote output will trigger an amp to turn on whenever the DQL-8 is on. The remote's maximum current output is 1 amp.

Remote: The included wired remote controls either the subwoofer output level or the master volume of the entire system; which one is selected in the menu. The remote is designed to be dash mounted, within reach of the driver; it can be mounted under the dash with the supplied bracket, or the bracket can be removed and the knob and LED can be custom mounted through the dash. Pressing the knob engages the auxiliary input. Dimensions:

  • Width: 2.571"
  • Height: 1.510"
  • Depth: 1.828" (2.476" including knob)

DDC Input: A wired Digital Dash Control (item number 161DDC) can be added to the DQL-8, 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 Blocks: The power/ground/remote in/remote out terminal and the speaker level input terminals are removable; the wiring is attached to the terminal block, then the block is plugged into the DQL-8. The terminal blocks will accommodate wire up to 12 gauge.


  • Maximum Speaker Level Input: 400 watts @ 4Ω
  • Maximum Output Voltage: 7.5 volts RMS
  • Frequency response: 10Hz-22kHz
  • THD: 0.01%
  • S/N Ratio: 105 dB
  • Balanced Input (aux) 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

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.