Contact us
Close contact box

AudioControl D-4.800

D Series 4-channel car amplifier with digital signal processing — 125 watts x 4

Item # 161D4800

Two keys to unlocking great sound in a car stereo system are serious power and extensive control — and this...

Read more from Crutchfield writer, Buck P.

Ships free

In Stock

Other options

About the AudioControl D-4.800

Amplifier and DSP in one package

Two keys to unlocking great sound in a car stereo system are serious power and extensive control — and this amp's got them both. For power, AudioControl's D-4.800 4-channel amplifier generates 125 watts RMS per channel, so it'll drive even the most demanding aftermarket speakers with plenty of headroom to spare. You could also bridge the D-4.800 to drive a couple subwoofers with 400 watts RMS each.

Amplifier and DSP in one package

Two keys to unlocking great sound in a car stereo system are serious power and extensive control — and this amp's got them both. For power, AudioControl's D-4.800 4-channel amplifier generates 125 watts RMS per channel, so it'll drive even the most demanding aftermarket speakers with plenty of headroom to spare. You could also bridge the D-4.800 to drive a couple subwoofers with 400 watts RMS each.

Computer-controlled digital signal processing

Smart-User DSP software

Smart-User DSP tuning software on a laptop (DM-810 version shown)

You won't find any knobs on the D-4.800 — you make adjustments and save settings via your laptop (PC or Mac). AudioControl's Smart-User DSP software package includes 12 or 24 dB/octave Linkwitz-Riley crossovers, 30-band equalizers, parametric filters, time delay/alignment for inputs and outputs, phase correction, AccuBass™ bass correction, and real-time analyzers (RTA) for the inputs and outputs so you can visually confirm the improvements in the sound.

It's made to work with a factory radio

Six active speaker-level inputs allow you to connect this amp to almost any factory system, even ones that have separate pre-filtered, time-aligned, and amplified signals going to separate factory speakers and tweeters. The D-4.800 sums them into one smooth, unified signal for you to balance, align, and tune for your better-sounding aftermarket speakers. AudioControl's Great Turn On (GTO™) signal-sensing circuitry turns the amp on automatically whenever it senses an input, so you won't have to run a separate turn-on lead back to the receiver.

Convenient features

Onboard LEDs indicate optimized signal flow for inputs and outputs, plus give you a warning when a source is too loud and causing distortion. An optional ACR-3 wired remote controller lets you select sources, control levels, and recall presets from your front seat.


Product highlights:

  • 4-channel car amplifier with digital signal processing
  • 125 watts RMS x 4 at 4 ohms (200 watts RMS x 4 at 2 ohms)
  • 400 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
  • all controls and adjustments made with AudioControl Smart-User DSP app on your laptop (PC or Mac) via USB connection
    • USB cable included
  • variable high- and low-pass filters (20-20,000 Hz at 12 or 24 dB/octave)
  • AccuBASS circuitry for improved bass response
  • 30-band graphic EQ, parametric filters, phase correction
  • time delay/alignment for inputs and outputs
  • RTA (real-time analyzers) for inputs and outputs
Other Features:
  • optiojnal ACR-3 remote controls level and recalls presets
  • MILC™ (Maximum Input Level Control) LED optimization and clip indicators
  • 6 speaker-level inputs (summable)
  • GTO signal-sensing turn-on
  • preamp inputs and outputs
  • fuse rating: 40A x 2
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • dimensions: 8-7/8"W x 2"H x 7-3/4"D
  • warranty: 5 years
  • Our 60-day money-back guarantee
  • MFR # 851-018-0

What's in the box:

  • Amplifier
  • 2.5 mm Allen wrench
  • 119" USB cable (Type-A on one end
  • Micro-B on other end)
  • Quick-start guide

Customer reviews

Loading reviews...

AudioControl D-4.800 Reviews

Average Customer Review(s):

Verified customer (What's this?)
Verified employee purchase (What's this?)



Crutchfield response

Product Research


Overview: The AudioControl D-4.800 multi-channel amplifier is designed to enhance the sound of your car stereo system, whether it's a factory or an aftermarket one, featuring AudioControl's powerful Matrix DSP sound processing. It accepts speaker-level or line-level inputs, and can be configured for 2-,3-,or 4-channel operation. The D-4.800 features a black brushed aluminum chassis, with black powder-coated cast alloy heat sinks and a one piece bottom panel. A black brushed-aluminum cover is provided to protect the amp controls from tampering. A 2.5mm Allen wrench (supplied) is needed to remove the cover.

Maximum Input Level Control (MILC): The amplifier analyzes the input signal to detect any clipping. If the signal reaches the level of clipping, the MILC Source Clip LED glows red, prompting you to turn down the gain level. When the gain level is maximized, a green Maximized LED will glow to indicate the gain, for that set of channels, is set to the optimum level.

GTO (Great Turn On) Signal Sense: If you are connecting the amplifier to a factory stereo, or an aftermarket unit without preamp outputs and a remote turn-on lead, the GTO Signal Sense circuitry can turn on the amplifier when an audio signal is detected on either the line-level or speaker-level inputs. After a period of time with no signal input, the amp will turn itself off.

ACR-3 Remote: The optional AudioControl ACR-3 wired remote is a dual-function remote that lets you adjust both the level of the main and line outputs, as well as recalling memory presets, all from the driver's seat. The ACR-3 has two LED indicators and a rotary/push-knob. When the blue LED is on, the remote knob raises and lowers the output level. When the knob is pushed in, the red LED will light, allowing the knob to recall memory presets when turned.

DM Smart DSP: The D-4.800 includes a micro USB (Type-B) port to connect to a laptop (USB Type-A to micro-B cable included), allowing you to use AudioControl's DM Smart DSP app. This is a fully featured Matrix DSP interface designed to give you control over every aspect of the processor. Features include routing any input to any output, gain adjustment, delay, polarity, and a 30-band EQ. High-pass, low-pass, and band-pass filtering can be set up for any output using 12 or 24 dB/octave Linkwitz-Riley crossovers. It also includes RTAs (Real Time Analyzer) for every input and output to easily identify and sum factory speaker signals for OEM integration.

Top Panel: Underneath the removable protective panel are the GTO on/off switch, labeling for all of the input/output connections, and the following LED indicators:

  • Power: If the amp is powering on correctly, this should be lit green.
  • Protection: The amp has built-in diagnostic codes to tell you exactly what is going wrong if the amp detects a problem. Both the Protection and Power LEDs can flash certain codes indicating where the problem is. A chart of these is provided in the Quick-start guide.
  • Communications LED: This LED lights when there is USB activity between the amp and your computer during set up.
  • Maximized Input LEDs: These LEDs illuminate when a maximum audio signal is present on any of the analog audio inputs. Signal levels should be lowered if these LEDs are on a lot. Three LEDs are provided covering: Front High, Front, and Rear.
  • Maximized Output LEDs: These LEDs illuminate when there is maximum signal present on any of the audio outputs. Signal levels should be lowered if these LEDs are on a lot. Two LEDs are provided, one each for Outputs 1/2 and 3/4.
  • MILC Source Clip LED: The MILC (Maximum Input Level Control) level-setting circuit prevents clipping and distortion. It calculates when the waveform of an incoming signal on input 1 or 2 is clipping and lights this LED. The level of the incoming signal should be set just prior to MILC LED coming on.

Connections: The D-4.800's connections are aligned along the front of the amplifier for ease of installation. The amp's connections include:

  • Fuses: Two 40A ATO blade-type fuses are installed in the amplifier.
  • Power: Set-screw terminals are provided for connecting +12V Power, Ground, and Remote In. The Power and Ground terminals will accept 8 to 4-gauge wire, while the Remote In terminal accepts up to 6-gauge. An 80A fuse should be placed in-line on the power wire, no more than 18" from the battery.
  • Line Level Inputs: Two pairs of RCA jacks are provided for connecting the amp to the source unit via RCA cables.
  • Line Level Output: One pair of RCA jacks for feeding the signal to another amplifier.
  • Speaker Level Input: Three sets of removable Phoenix (or Euroblock) connectors are provided for connecting the source unit via speaker-level input.  The connectors are labeled Front High (for tweeters), Front, and Rear.
  • ACR-3 Control: This RJ-14 telephone-type connection allows you to plug in the optional ACR-3 Remote. The ACR-3 is used to change the output level and for recalling memory presets.
  • USB: A micro-USB (Type-B) is used for connection to a computer for DSP configuration.
  • Speaker Output: Two removable Phoenix connectors are provided for connecting speaker wire. The amplifier will accept a load impedance of 2Ω or higher in stereo (4Ω or higher when bridged).

Power Output: The D-4.800 has the following power specs:

  • 4 x 125 W RMS @ 4 Ohms
  • 4 x 200 W RMS @ 2 Ohms
  • 400 W RMS @ 4 Ohms bridged

Loading accessories...

Customer Q&A

Crutchfield asked: Why did you buy this?
I picked this based on the information provided by the Car Audio Fabrication channel on YouTube. The built in DSP provides significant value to me both in the areas of cost effectiveness and ease of use. [ Robert  Feb 19, 2019 ]
great amp with built in DSP [ M  Dec 19, 2018 ]
excellent quality excellent materials and very highly recommended [ Santos  Jul 03, 2018 ]
Needed a compact way to get a DSP and an amp into my truck and this one received good reviews and is priced well. [ D  Nov 27, 2017 ]
Versatile product [ Franklin  Sep 18, 2017 ]

4 questions already asked

I'm trying to compare this to a audison but ten d. Are they comparable in bitrate?
[ J  Aug 16, 2018 ]
1 answer
Highly recommended is a small monster for its dimensions and for its output power. It occupies very little space the DSP software is very easy to understand you will not regret this product
[ Santos  Aug 16, 2018 ]
I'm curious if current owners of the D4.800 that also have the ACR-3 optional control knob have compared the sound when using the ACR-3 to control volume vs the volume control on the factory stereo. Do you view the ACR-3 as a must to truly get the sound you want?
[ Chris  Jun 21, 2018 ]
4 answers
use the ACR-3 for adjusting my subwoofer level.So if you are using a subwoofer, it is a must. Hope that helps
[ Scott  Jun 21, 2018 ]
In my case the inmy difference is that about 4/5 of Max volume from the HU the bass frequency drops, which you can fix with the AccuBASS! I use the control for output control to my sub amp
[ Dimas  Jun 21, 2018 ]
I wouldnt say its necessary for volume, unless you want finer control. If youre using it to power a sub off the 3-4 channels it is necessary as each album is mastered differently and may need more or less bass on a per track/per album basis.
[ donald  Jun 21, 2018 ]
i use the ACR-3 as a bass knob for a separate subwoofer amp. I have used it as a volume knob as well and it was equivalent to turning up the volume on my receiver. The quality of which is better would depend on your source unit. Another thing it allows for is switching between EQ curves and other settings on the amp from the front seat. I have different curves for different sources and switch when needed.
[ Jami  Jun 21, 2018 ]
Audio control D4.800. would this work with nissan Altima Bose h/u running 2.0 ohm speakers sys?Powerbass 6.5 in f/door , jbl 5.25 in r/door, jbl 6x9 r-deck , 300 watts rms total.
[ JOHN  Feb 09, 2018 ]
1 answer
My 2015 Camaro has 2 ohm speakers in the rear deck. I solved this problem with a wire harness that went between the speaker and the factory speaker wire so I didn't have to splice anything. Unfortunately Crutchfield didn't carry such a harness.So maybe do some research and see if you can fi something similar for your car. Alternatively you could get speaker connectors for your car and alter them. Ask Crutchfield support for help
[ Scott  Feb 10, 2018 ]

Loading articles...