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Alpine PXE-H650

IMPRINT™ sound processor
Get top performance from a full audio system while retaining your factory stereo

7 Reviews

Item # 500PXEH650

This item is no longer available.

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Our take on the Alpine PXE-H650

If you're adding amplifiers to a factory system and want the best possible sound, put the PXE-H650 System Integration Sound Processor into your system. It takes the output of your factory radio, cleans it up, and applies special IMPRINT sound-shaping technology so your amps get a clean signal. You'll build a great-sounding system while keeping the look and functionality of your factory radio's dashboard setup, steering wheel controls, and factory extras.

Alpine Authorized Online Dealer

If you're adding amplifiers to a factory system and want the best possible sound, put the PXE-H650 System Integration Sound Processor into your system. It takes the output of your factory radio, cleans it up, and applies special IMPRINT sound-shaping technology so your amps get a clean signal. You'll build a great-sounding system while keeping the look and functionality of your factory radio's dashboard setup, steering wheel controls, and factory extras.

A 512-band equalizer removes the preset EQ curve from your factory radio's output, sending a clean "flat" signal to your amplifiers through four sets of preamp outputs. High- and low-pass filters for each output channel route the right frequencies to each amp.

IMPRINT sound tuning technology
The PXE-H650 takes the guesswork out of system setup with the impressive automatic sound tuning feature. Connect the included microphone and place it in your preferred listening position in the vehicle. IMPRINT will analyze the acoustics in each listening postion, adjusting the sound so that any seat in the car can be the best seat in the house.

You can use either the PXE-H650's controls or a PC loaded with the supplied software for easy system setup and adjustment. Like to tweak it yourself? No problem — you'll find a built-in 3-band parametric equalizer, manual crossover controls, and manual time-correction controls built in as well.

Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.

Product Highlights:

  • system integration sound processor for use when adding amps to a factory system
  • four sets of preamp outputs (front 1, front 2, rear, and subwoofer)
  • IMPRINT sound technology with a 512-band EQ and time correction
  • manually adjustable 3-band parametric EQ
  • high- and low-pass filters
  • included microphone allows custom sound shaping for your vehicle
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • PXE-H Audio processor
  • Microphone with 24' cable attached
  • RUE-4265 wireless remote control
  • 2 "AAA" batteries
  • Power supply wiring harness
  • Speaker level input harness
  • IR remote sensor with 18' cable attached
  • 2-Sided tape
  • MultEQ LED
  • Imprint setup CD
  • Owner's manual (English/French)
  • Easy setup guide
  • Customer Care Registration card

Alpine PXE-H650 Reviews

Average Customer Review(s):

(7 Reviews)


kelley from MADISON WI on 1/23/2010

Crutchfield Customer Review (What's this?)

When this thing worked it make the sound in the "sweet spot" sound remarkably good. It also makes the sound everywhere else sound worse. It has to make the delays, to every one else, worse in order to adjust the delays, to optimum, for your listening area. The controls I found to be very, very awkward, having yet another remote control to fumble with was very annoying and having to look at it, until you memorize it, is dangerous. Not being able to use the many controls, on my touch screen head unit, really took the fun out of this product. On top of all that it completely quit after 3 months of very light use. I had turned it on a total of maybe 8 hours. I cannot recommend this product to anyone until Alpine rethinks it's use, operation and packaging.




Brian from Houston, TX on 1/13/2010

Using this with 2008 Silverado and Boston Acoustic Amps and Speakers. Alpine unit has introduce audible (and anoying) alternator whine and turn on pop to my system. Various ground/wiring configurations, filters, loop isolators, expensive patch chords did not improve the situation. I've given up and I'm trying to learn to live with the whine and pop - it's not horrible. Running autoconfiguration multiple times generated widely inconsistent results, except for consistently pulling my soudstage to the right front by my ears. The pull to the right can be overcome by adjusting the balance on the remote, but it seems to lower the overall volume of the system. After a year or so of use, it is startging to cut the signal to the sub at times and sometimes cuts the signal all together. This is a recent development - so no pattern identified. It seems that switching between aux and head unit on the remote seems to be a short term fix (go figure). Aside from these issues, it has improved the overall sound quality of the system which I appreciate and I really like the remote. However, I think I will be looking to replace this with the RF 3sixty.1 or the JL clean sweep.



Can't get my sub to work

jerry from Snohomish, WA on 5/16/2009

Crutchfield Customer Review (What's this?)

I hooked mine up months ago and was very impressed. The sound stage on my front speakers was superb, unlike anything I have heard. Then I added a sub and after at least ten hours and several calls to Crutchfield and Alpine and can not get any output to the sub. Alpine told me this was a known problem, but the fix they suggested didn't work. I finally hooked speaker level inputs to my sub and adjusted it manually. I hope to solve the problem someday. I will keep trying. It has been like a second job trying to figure it out. Don't buy one or if you do get ready to return it.



Great Product

Kevin from Brewster NY on 5/5/2009

Crutchfield Customer Review (What's this?)

First off I bought this unit to replace an old Clarion Pro Audio EQ that died. It is being used in a complete aftermarket system. So if your looking to buy this unit to interface a factory head unit you mileage may vary from mine. Kenwood Head unit, 80x4 amp, 300X1 amp, Alpine separates in doors, Boston Acoustics in the back, and a Rockford Fosgate DVC 12" Sub. Install was straight forward and took me no time. When using the PXE with line level inputs it bypasses the AntEq. So I put my volume to 30 out of 35, front and rear amp gain to 1/2, Sub to 1/4, aux input gain to just below clipping and ran the calibration. Once done my heart sank with how low the sound coming out of the speakers was, then my fingers found the volume button on the remote whew. As I tuned up the volume my smile got proportionately bigger. Like another reviewer stated the sound stage alone is worth the money. A few tweaks of the parametric eq, crossover points and the sub level in the custom settings and my system now sounds so much better then before. Warm, tight, and loud with no distortion. The only reason I didn't give it 5 stars was because I think the parametric eq should have 2 more frequencies if you can't play with the "512 band" eq



Alpine PXE-H650

Troy from STL, MO on 8/31/2008

Crutchfield Customer Review (What's this?)

Pro:It did help my setup sound allot better,but not perfect.5band param eq on my MP3,but currently not using it Con:Outputs are too low(amps turned up till got allot of hiss).Subs distort earlier than expected.It just applies a crossover to these 2 front channels & treats it as 1 channel when it calibrates.I would have bought 1 less amp if I knew this.Also,more adjustability after the calibration,like the ability to adjust the 512 band eq Helpful hint:Sub+/- setting affects the calibration(the bass,mid&treb dont affect calibration)Some reviews said bass was too quite,they probably had the sub+ turned up when they calibrated.The manual didnt include this info.I pressed sub- all the way down.Then pressed sub+ 4 times.Then go thru the calibration.I used the laptop for calibration, because it helps you w/line level matching of the 6 channels,also might min distortion. Subs distort earlier than expected.To fix,set the line levels to have PXE650 subtract few db on the subs & add few db to the rest of the speakers on calibration.This might help w/background hiss,since the door amps wont need to be turn up as much Calibration needs 4 positions.Position 1=drivers seat.Position 2=passengers seat.The other 2,you choose.The last 2 positions seem to be averaged into the overall calibration,because freq response varies,if you review the laptop logs.My sub response varied,pending on positions chosen. MP3 player,RF P1000-1BD/w bass ctrl,RF P200-2, RF P400-4, 2 10"sub



it doesn't work well for me

robin from amityville NY on 4/13/2008

Crutchfield Customer Review (What's this?)

It look nice and all but it doesn't work well, i can't fade the sound front or rear. i try to tune it my self,it will not tune, it says error after the sound test. i don;t know what to do. i just not in a mood to work on it, no one knows much about it that is a problem. hopefully soon i will find out.



Not to bad...

Rudy from Boston, Ma on 11/6/2007

1. The 1st and 2nd units I received were faulty. The 3rd unit is pristine. Due to all the problems I had with the 1st two units, the place from which I purchased the unit and had do the install had Alpine send a technician out to help. As I said, he found that the 2nd unit was also faulty and had the 3rd, TESTED unit sent. <BR><BR> 2. The unit does what it's supposed to do for the most part. THE #1 BENEFIT OF THE PXE IS THAT IT SETS UP A FANTASTIC SOUNDSTAGE, THIS ALONE MAKES IT WORTH THE PRICE. However, you should be aware that you will STILL have to do a good amount of tuning on your own. In my case, the unit set the SW crossover to high and the HP to low. Also, MultiEQ didn't adequately compensate for my car's resonant frequency. In conclusion, I'm still very satisfied with it's performance because it DOES do the time correction AND it DOES do MOST of the tuning for you...for most people, the PXE will be fine, however if you're a phile like I am you might want to read on. The bass still isn't as upfront as I'd like it and the bass is not balanced properly between the cabin and the subwoofer because the manual EQ offered by the PXE doesn't provide the required flexibility. I'm convinced that if I want the bass to be right I'll have to get another EQ/processor that mounts in the trunk.....another 200 - 600 dollars for what I'm considering. Just so you know, I've got dynamat extreme all over the place. <BR><BR> 3. The unit has EXTREMELY low level output. I have it driving Alpine PDX amps...the 150.4 for the cabin and the 600.1 for the SW. Using just the unit's output after increasing it's gain to MAX, I still had to increase gain to max on the 150.4 and the 600.1. Even with that adjustment, I couldn't reach maximum amp output from the 150.4 and the only way I could hear my sub (and I'm not exagerating) was to put my ear a few inches from it. I ended up buying a very high quality line driver. Even with the line driver at max amplification, and at full volume on the PXE, I was barely hitting 2vlts out to the 150.4 and less than 1vlt to the 600.1. Luckly these levels are sufficient to properly tune my amps although I STILL can't push the amps to MAX CLEAN output without further preamp amplification. However, I CAN properly tune amps for ultra quiet operation with more CLEAN volume than I "should" ever use (hehe). You should know that I was using the SPEAKER output of a BOSE "premium" factory system, so there was plenty of clean input to the PXE. <BR><BR> 4. So, total cost for the PXE and the line driver was ~$600. Some might want to get the JL cleansweep (because it has 8v preout) and a good trunk EQ. However, you won't get the Time Correction with that setup. You WILL almost definitely need more output than the PXE provides and will need, in my opinion and from my experience, AT LEAST




Hands-on research

Product Research


Overview: The Alpine PXE-H650 System Integration Audio Processor accepts input from nearly any factory or aftermarket radio, removes any existing equalization, and adjusts to overcome acoustic shortcomings of the specific vehicle's interior. A preamp signal then feeds your aftermarket amplifiers and speakers, allowing a substantial sound quality upgrade without sacrificing any OEM features (CD changer, DVD system, satellite radio, Bluetooth integration, etc).

Input: The 5-channel auto ranging input will accept either speaker level or line level inputs. Typically the 5 channels are front left/right, rear left/right, and subwoofer. If the factory system has no subwoofer, that input is not used. A left/right tweeter and left/right woofer signal is also compatible. If you have an aftermarket head unit with preamp outputs, the RCA input can be used instead.

Auxiliary Input: When the auto ranging input is used for the main signal, the RCA inputs can be used for an auxiliary source.

Output: There are seven RCA outputs:

  • Left/Right Front (1): high-pass; use for tweeters in a bi-amp front component set
  • Left/Right Front (2): band-pass or high-pass; band-pass for woofers in a bi-amp front component set or high-pass for a component set (not bi-amp) or full range speakers
  • Left/Right Rear: high-pass; rear speakers
  • Sub: single subwoofer output jack

Auto Ranging Input: Once connected, the first step in the automatic calibration is measuring and compensating for the factory output so each channel is at the correct level. Before starting, the balance and the fader are centered, and the volume is set to approximately 3/4 (the volume on the factory radio is left here, future volume adjustments are made using the PXE-H650's remote control).

AntEQ: Next, playing the included setup disc, the AntEQ analyzes the factory radio output relative to the fixed test sound patterns, and removes any equalization; creating a flat, full range signal.

MultEQ: After the AntEQ has created a baseline (flat) input signal, the Audyssey MultEQ uses the setup disc and included microphone to measure the effect the car has on the test track output. Absorption by soft surfaces, reflection by hard surfaces, and delay caused by speaker placement are measured at several listening positions (4 minimum, 8 maximum). Once the data are collected, an EQ curve is created to correct the coloring of the sound by the car's interior and each channel (up to seven) is time aligned to optimize the image at the first two listening positions (the first two positions are memorized as user presets). Optimum crossover points (if needed) are also measured and saved for each channel.

Sound Customization: You can further tailor the sound to your personal taste after the Audyssey MultEQ has corrected for the listening environment. Each channel has a 3-band parametric equalizer, additional time correction, and crossover adjustments.

Equalizer: The EQ is adjusted for each channel individually and separate curves are memorized for the Auto Ranging and Aux inputs:

  • Level: the three bands range +/-6 dB in 1 dB increments
  • Q: the width of the EQ band is adjustable from 0.5 to 2.0 in 0.5 steps
  • Frequency: the center frequency each EQ band is adjustable:
    • Bass: 30, 40, 50, 60, 80, 100, 125, or 150 Hz
    • Midrange: 500, 750, 1k, 1.5k, 2k, 3k, 4k, or 5kHz
    • Treble: 6k, 7.5k, 10k, 12.5k, 15k, or 17.5kHz

Crossover: Each set of preamp outputs (Front 1, Front 2, Rear, and Sub) has an adjustable crossover:

  • Front 1: this high-pass tweeter output is only used if you bi-amp the front component speakers; adjustable from 200 Hz to 5 kHz, the slope is 12 dB/octave
  • Front 2:
    • Bi-amp: when you bi-amp the front speakers this becomes a band-pass crossover; LPF: 200 Hz to 5 kHz, HPF: 50 Hz to 200 Hz, both 12 dB/octave
    • Not bi-amp: when you don't bi-amp the front speakers this is a high-pass crossover; 50 Hz to 200 Hz and 12 dB/octave
  • Rear: high-pass crossover; 50 Hz to 200 Hz, 12 dB/octave
  • Subwoofer: low-pass crossover; 50 Hz to 200 Hz, 12 dB/octave

Time Delay: Each of the seven output channels can have additional signal delay assigned; 0 to 10ms in 0.1ms steps.

Note: If you bi-amp the front component speakers, each tweeter and each woofer is time aligned individually.

PC Control: The USB port on the PXE-H650 is used for PC control interface.

IR Input: Regardless of the unit's installation location, the included remote sensor can be mounted in a convenient location and wired to the PXE-H650.

Wired Remote Input: Like on many Alpine head units, there is a 3.5mm input for compatible steering wheel remote adapters.

Power: An automatic signal sensing circuit turns on the processor along with your radio. When the input signal is absent for 5 minutes, the system turns off.

Our Product Research Team

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