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Alpine PXE-0850S

8-channel car amplifier with digital signal processing — 25 watts RMS x 8

Item # 500PXE0850

Talk about a jack-of-all-trades.

Talk about a jack-of-all-trades.

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About the Alpine PXE-0850S

Make your system sound spectacular

Talk about a jack-of-all-trades. Alpine's PXE-0850S amplifier/processor will deliver high-fidelity sound to almost any car audio system, aftermarket or factory. The PXE-0850S can be used as a stand-alone sound processor, taking up to six inputs — from a factory system's high, midrange, and low frequencies for example — and providing twelve processed channels to feed your amplifiers. The PXE-0850S can also serve as a factory system upgrade — an amplifier with onboard sound processing — sending 25 watts RMS each to up eight separate speakers. This handy little magic box comes with a Bluetooth® adapter so you can stream music wirelessly from your compatible device without even needing a receiver in your system.

Make your system sound spectacular

Alpine Authorized Online Dealer

Talk about a jack-of-all-trades. Alpine's PXE-0850S amplifier/processor will deliver high-fidelity sound to almost any car audio system, aftermarket or factory. The PXE-0850S can be used as a stand-alone sound processor, taking up to six inputs — from a factory system's high, midrange, and low frequencies for example — and providing twelve processed channels to feed your amplifiers. The PXE-0850S can also serve as a factory system upgrade — an amplifier with onboard sound processing — sending 25 watts RMS each to up eight separate speakers. This handy little magic box comes with a Bluetooth® adapter so you can stream music wirelessly from your compatible device without even needing a receiver in your system.

The software

You control the PXE-0850S's 32-bit 300 MHz processing wirelessly with your compatible Bluetooth device or with a Windows-run PC via the supplied USB cable. You download the free PXE-DSP-APP for iOS or Android device from the Apple APP or Google Play Store. The PXE-DSP-APP for Windows is available at

The control app

Matrix mixing allows for summing and input/output signal management. Fully adjustable high-pass, low-pass, and bandpass filters on every channel match the sound to your speakers. The 31-band equalizers help achieve the perfect tone, allowing you to smooth out any hot spots or dips in the frequency response of your vehicle's interior. The delay feature lets you center the stereo image for your listening position.

Remote included

The PXE-0850S comes with a wired LCD remote controller so you can control volume, store and recall presets, and select between sources from the driver's seat.


Product highlights:

  • 8-channel car amplifier with digital signal processing
  • 25 watts RMS x 8 at 4 ohms
  • DSP adjustments and settings made via Bluetooth device, Windows PC via USB, or wired remote
    • download PXE-DSP-APP for iOS or Android device from the Apple APP or Google Play Store
    • download PXE-DSP-APP for Windows at
  • inputs: 6 assignable preamp and speaker-level
  • outputs: 12 processed channels (RCA)
Adjustment Details:
  • 12-channel 32-bit 300 MHz digital processor
  • 31-band EQ with fine tuning
  • adjustable high-, low-, and band-pass filters (20-20 KHz)
    • selectable filter slopes (12, 18, 24, 30, 36, 42, 48 dB/octave)
    • selectable filter characteristics (Butterworth, Bessel, and Linkwitz-Riley)
  • delay: 0-20 milliseconds (0-273")
  • phase adjustment: 0 or 180°
Other Features:
  • includes wired LCD remote control, Bluetooth adapter, and USB cable
    • remote dimensions: 3-1/2"W x 1-3/4"H x 3/4"D (1-11/16"D with knob)
  • fuse rating: 20A x 1
  • wiring and hardware not included with amplifier
    • 10-gauge power and ground leads recommended
  • dimensions: 8-5/16"W x 1-7/8"H x 7-1/2"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # PXE-0850S

What's in the box:

  • Signal processor/amplifier
  • 16.5' USB 3.0 extension cable (Type A USB 3.0 connectors on each end) with 45" pigtail for connecting remote commander (4-pin barrel connector)
  • 6" Power/ground/input harness (20A ATO fuse on constant power wire)
  • Two 6" Speaker output harnesses
  • 2 Metal mounting brackets
  • 4 Self-tapping screws (Length 3/4")
  • 10 M3 x 6mm machine screws
  • Remote commander with 15" cable (4-pin barrel connector)
  • External Bluetooth module with 6" cable (RJ45 plug)
  • Limited Warranty
  • Product Registration card
  • Important Information card

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Sound Tweaker's Paradise

Crutchfield customer from Alpharetta, GA on 2/2/2019

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This is a great unit and sound tweaker's paradise. The unit replaced Bose amp that I really didn't like in 2017 Mazda CX-5, along with a new set of ScanSpeak Revelator woofers and Illuminator tweeters replacing Bose. This was complemented by a power JL Audio PowerWedge+ powered subwoofer. Pretty much all the settings like crossovers, levels, polarity, delay, 32-band equalization (graphic or parametric) are available through the Alpine PXE-DSP app (on iPhone that was connected over Bluetooth to Alpine unit). One of the interesting features of the unit is Mixer that allows to connect multiple source together and mix the signals. For example, one could connect an RCA cable from a portable music player if headunit does not have one. It also allows streaming music over Bluetooth directly to the unit as well. I did have a few cases that the unit got disconnected and would not reconnect so I had to pull the plug on it (literally) and it reconnected fine and "hard" reboot. As far as power goes, while 25 x 4 does not sound like much, it *is* capable of driving my speakers (90 db sensitivity) to the volumes that make me deaf. I am guessing for some other speakers with very low sensitivity (like 84 db) it may have not enough power so just keep that in mind. Sound quality was very good although I bet a standalone amp would provide a better overall sound (can be added here as well). Happy with it overall; definitely recommended.

Pros: Easy to install, very easy to use. Virtually everything can be changed using iOS App while connected to the unit over Bluetooth connection. Sufficient power for higher sensitivity speakers (90 db woofers in my case)

Cons: Included wired remote never worked for me (was stuck on the loading screen forever). Bluetooth connection can be flaky sometime, requiring to disconnect power from the unit to be able to reconnect again.

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Product Research


Overview: The Alpine PXE-0850S Advanced Wireless Digital Sound Processor lets you customize your vehicle's sound system for the best sound quality and sound staging. The processor can be used with a factory system, or with and Alpine or other brand of head unit. With 31 bands of independent equalization per channel and multiple crossovers, the processor can help you dial in the sound that's right for your vehicle. It has 6-channels of high- or low-level input from your factory or aftermarket head unit, with 8 speaker outputs and 12 preamp outputs. The PXE-0850S can connect to a Windows PC via USB, a Bluetooth-connected smartphone, or the included Remote Commander for making all your adjustments. The processor comes with a power/ground/speaker input harness, two speaker output harnesses, and a USB 3.0 interface cable.

Construction: The PXE-0850S is equipped with a Texas Instruments 32-bit DSP with 300MHz floating point processor, and a TI 24-bit premium A/D and D/A converter. The unit lets you take up to six independent signals (low, mids, and highs per side, for example) and combine them into a full range signal. This full range signal can be sent to up to 12 independent channels for an extremely versatile system.

Inputs: The processor features six channels of speaker-level inputs on the included harness and 3 pairs of RCA line level inputs on the unit. In addition, the PXE-0850S has optical (Toslink) and coaxial (RCA) S/PDIF digital inputs to play music from an in-vehicle CD or DVD, and an external Bluetooth module for connecting your smartphone.

Outputs: The PXE-0850S has 25 watts RMS output per channel x 8 channels for powering multiple pairs of speakers. It also has 12 channels of preamp level outputs. The signal of the speaker outputs mirror the first 8 RCA output channels.

User Interface Options: The Alpine PXE-0850S Digital Sound Processor can be controlled in three different ways:

  • Mobile Phone App: The Alpine PXE-DSP-APP application lets you control the processor from your smartphone or tablet. The smart device connects via Bluetooth through the included External Bluetooth interface. The PXE-DSP-APP allows you to adjust the Master Volume, Switch the Output Channels to adjust, Set the EQ curve, Q-value, and Frequency Tuning, Set the Crossovers, Set the Delay, and Set the Audio Output Mixing. The app is compatible with Apple devices running iOS 8.0 or later, and Android devices with version 4.0 and up.
  • PC Software: You can connect a PC to the processor via the included USB 3.0 cable. The functions of the PC software are the same as the Mobile Phone app. The graphic displays on the PC are much more detailed than the Mobile Phone App. The PC software runs on Windows XP, Windows Vista, Windows 7, Windows 8, and Windows 10.
  • Wired Controller: The included Remote Commander has limited control via its large rotary control and 1-3/8" display. The Remote Commander can adjust the Master Volume, switch the audio input source (S/PDIF, Hi.Level, Phone (Bluetooth), Aux (low level)), and set and recall the Preset Sound Effects. Further detailed settings must be made through the Mobile Phone App or PC Software.

Equalization: The PXE-0850S features 31-bands of independent equalization per channel, with both parametric and graphic EQs. In the Parametric EQ, you can adjust the frequencies between 20Hz and 20kHz. In the Graphic EQ, the frequency bands are set 1/3-octave intervals at 20, 25, 32, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000, 10000, 12500, 16000, and 20000 Hz. The slope (or Q value) is adjustable between 0.404 and 28.85 in 0.01 increments. The gain of each band can be increased or decreased by up to 12dB in 0.1dB increments.

Crossovers: Each output is equipped with independent high- and low-pass filters. Bandpass filters can also be configured. For each channel, you can select the type of filter - Butterworth, Linkwitz-Riley, or Bessel. Crossover points are fully adjustable from 20Hz to 20kHz in 1Hz increments. You can choose from the following crossover slopes: 12dB, 18dB, 24dB, 30dB, 36dB, 42dB, or 48dB per octave.

Time Correction/Phase: The PXE-0850S can apply a wide degree of time correction to each of the 12 channels of output: Left and right front (low, mid, tweeter), Center, Left and right rear (mid, tweeter), and Subwoofer. You can choose the amount of delay in milliseconds (0.000 to 20), centimeters (0.00 to 692 cm) or inches (0.00 to 273"). The phase of each output can be set to positive (0°) or inverted (180°).

Presets: After you have set the EQ frequency, Q-value, and gain data, delay, channel, and phase position settings to your liking, you can save them to one of up to six different sound presets. This allows you to make different sound settings for each input type or music genre.

Protected Settings: Current settings can be protected by a six-digit password. The values of the 31-band EQ frequency, Q-value, and gain data, delay, channel, and phase settings are encrypted to prevent accidental changes or deliberate tampering with the settings.


  • Frequency Response: 20Hz to 20kHz
  • Dynamic Range: ≥110dB
  • Signal-to-Noise Ratio: ≥100dB
  • Total Harmonic Distortion: ≤0.05%
  • Input Impedance: Low-level Input: 20kΩ; High-level Input: 330Ω
  • Low-level Output Impedance: 51Ω
  • Scope of Signal Input and Output: RCA Input: 7.5Vpp; High-level Input: 24Vpp; RCA Output: 7.5Vpp
  • Power Source: DC 9V-15V
  • Standby Power Consumption: ≤0.1W
  • Output Signal Gain Range: Mute, -59.9dB to 0dB
  • Dimensions: Width 8.261" Height 1.823" Depth 7.454"
  • Remote Dimensions: Width 3.46" Height 1.71" Depth 0.75" (1.63" including knob)
  • Weight: 3 pounds 9.4 ounces

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Customer Q&A

Crutchfield asked: Why did you buy this?
12 channels out [ Ramon  May 09, 2019 ]
I usually don't buy an item new to the market with little to no reviews to be found, but this Alpine PXE-0850S seems too good to pass up. I have been looking at the AudioControl DM 8.10 for some time and also the Alpine H800, but this unit has it all and comes with it all. The controller is included, not extra, and the Bluetooth adapter is also included, not "coming soon" for over a year. The mobile App can also be downloaded for free. It is expensive, but with everything included, a bargain [ DanenG  Nov 28, 2018 ]

11 questions already asked

Can one main input control 6 different channels?
[ PATRICK  Aug 08, 2019 ]
3 answers
Yes, There is a "mixer" section in the software. You first select and input source, (bluetooth,HiLevel, AUX1-6 or SPDIF) Next select a channel and there are sliders that allow you to control the level that the selected input is sent to that channel. search of PXE_0850S software and download from Alpine's site. You can run the software on a PC and you will be able to see the capabilities. About the only limitation that I have found is the you can only select one input source at a time. e.g. you can not have HiLevel and AUX at the same time About the only issue that I have found is that both the phone app and the PC volume goes to 60 and the controller goes to 66. This is not just a numbering issue the 66 from the controller is louder than the 60 from the software. Overall a very impressive unit
[ william  Aug 12, 2019 ]
Yes it can, however you won't have fade/balance control. If using rear fill, you may want to use the high level inputs for front and rear. If your interested in the unit I recommend downloading the DSP software to familiarize yourself with it. Compared to other DSPs, the biggest points are the 12 outputs and 31 band graphic/parametric eq. Everything I I have is Alpine except my speakers, this was the final piece, and the fine tuning can get elaborate.
[ Robert  Aug 08, 2019 ]
Yes. Each output channel (12 total) can specify which input channel(s) it will receive and the level from each input. The mixing can be individually configured for each input source (digital, RCA, Bluetooth, etc). The only limitation is that you cannot time align the input signals (pre-processing) which is only an issue if attempting to reconstruct a full range signal from multiple crossed-over input signals that have signal delays already applied. Output channels can be fully time aligned 0-20ms. If you want to take a full range stereo signal you can easily split it into 12 output channels, 8 of which are mirrored on both RCA and amplified outputs.
[ RICHARD  Aug 08, 2019 ]
I am considering using this processor , will it sum the audio signals coming out after a Mark Levinson amplifier (Lexus GS350 2018)? I am pretty sure the ML amp has built in crossovers and they go to the factory tweeters and midbass and subwoofer. I also will be adding a 4-ch. and a dedicated sub amplifier, then go to new front and rear speakers and a dual 10" sub box. Will I retain fader? Thanks
[ Rich  Apr 25, 2019 ]
2 answers
With your vehicle, and the complex set up you are seeking, I would highly recommend you get in touch with one of our Advisors!
[ Calvin  May 06, 2019 ]  Staff
I am not 100% sure about the "summing" capabilities of this awesome DSP, but I'm pretty sure you can. I believe Alpine calls it "audio mixing". I'd advise you to download both user manuals from the Alpine website which may help you with this question. Now one thing I can give you some advise regarding an aftermarket amp, I highly suggest getting the Alpine PDX-V9 5-channel! It isn't going to win SPL contests, but for it's size it packs one heck of a punch, and they are as clear sounding of an amp I have ever owned. And I've owned some good ones. The RMS ratings are always much more on these amps than stated as mine is 128rms x 4 + 586rms x 1. FWIW, the PDX-V9 is very similar to the JL Audio FD900/5. Save yourself $600.00 and go with the much more reliable/powerful PDX-V9! You will not be disappointed...
[ ANNA  May 06, 2019 ]
What is the blue tooth codec protocol? And Is it High Res?
[ Jason  Feb 17, 2019 ]
1 answer
I've looked through all the information we have on it, the manual, Alpine's site, and a few other online sites but cannot find any information on the Bluetooth codec's. Because of this, I recommend contacting Alpine on 800-257-4631 to see if that have the specifics on the codecs My Bio:
[ Paul  Feb 23, 2019 ]  Staff
My factory speakers are all 2 Ohm. Can this amp handle 2 Ohm? If it can, do I get 50 W per channel instead of 25 W?
[ Scott  Oct 27, 2018 ]
1 answer
I've searched all our information on it as well as Alpine's site but found no mention of 2 ohms. I expect that much like a head unit, it will work with 2 ohm speakers and that you won't get any extra power My Bio:
[ Paul  Nov 07, 2018 ]  Staff
Can u bridge 2 of the channels to one?
[ Xdcoop  Oct 05, 2018 ]
1 answer
The channels are not bridgeable.
[ Ryan  Oct 10, 2018 ]  Staff
What are the size dimensions for the remote?
[ A  Sep 27, 2018 ]
1 answer
The remote dimensions are: Width 3.46" Height 1.71" Depth 0.75" (1.63" including knob) We're adding them to the product's main webpage as well. I hope that helps My bio:
[ Ryan  Oct 04, 2018 ]  Staff
Can I use this on my 17 mb c300 instead of a jl audio fix and dsp amp?
[ Jeffrey  Sep 09, 2018 ]
1 answer
Those 2017 C300's have an amp in them that separates the audio that goes to each speaker and that means you will need something to sum with signals together to install an amp to that stock system. Something like the JL Audio Fix is needed, but I should also mention that some DSP amps have the ability to sum the signals. I recommend contacting an advisor on 1-800-324-9695 to discuss your goals and see if any of those DPS amps with built-in signal summing will work for you My Bio:
[ Paul  Sep 22, 2018 ]  Staff
Would 25 watts be plenty of power for a tweeter? I'm not really a fan of dedicating 100 w x 2 channels to just the tweeters. If 25 watt rms is more than plenty to drive a tweeter, this processor would be great for an Active setup.
[ Mbrogz3000  Jul 14, 2018 ]
1 answer
Generally speaking; tweeters do not require a lot of wattage. Having said that; it depends on the specific tweeter model and it's specifications. For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service:
[ Ryan  Jul 20, 2018 ]  Staff
Does this processor, the Alpine PXE-0850S, have center processing or is it just a sum of some other channels? Like the H800 or not?
[ SterlingT  Jun 25, 2018 ]
1 answer
It has center channel processing when sending in audio using its multi-channel input and digital audio inputs. It will have to create center channel audio when fed a 2 channel audio signal My Bio:
[ Paul  Jul 11, 2018 ]  Staff

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