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Thread: Alpine PXA-H701 Questions

  1. #371
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    Hi guys

    I just had my first CarPC installed today. Right now it's just running an FM modulator into my stock bose system and of course it sounds ****ty as hell. But I plan on redoing my entire system and will look into the RUX/H701 Combo. But before I do, I just want to confirm....that as long as I own RUX Controller, I don't need a head unit, right? The RUX controller *IS* a replacement for the HU, right? If so, I think I seriously go this route, and run the CarPC into the H701 via Tos-Link connection.

    Best solution, right?

  2. #372
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    The 701 combo is NOT a head unit, it is ONLY a processor. It does not have AM/FM radio, it does NOT have a CD player. All it does it allow for fine tuning of your audio system.
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  3. #373
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    Quote Originally Posted by RedGTiVR6 View Post
    The 701 combo is NOT a head unit, it is ONLY a processor. It does not have AM/FM radio, it does NOT have a CD player. All it does it allow for fine tuning of your audio system.
    Hello RedGTiVR6 and thanks for the reply

    I know the RUX controller is not a head unit in the typical sense of the word, I just referred to it as that since it's almost the same size, and fits in the same DIN bay as the regular HU. I do not need a radio HU of any sort at the moment. No CD player, no radio.


    I do have a few remaining questions for you Red that I'm hoping you can answer for me:

    1)Will there be any problems adjusting the main volume or making any other adjustments from the RUX controller, while having the Toslink from my PC running into the H701?


    2)Right now I am getting a bit of alternator whine, as a result of my car PC being connected to an FM Modulator via cheap RCA cables. Assuming I eliminate everything and ONLY install the H701 combo, my PC, and my 4-channel speaker amp, what are the chances the alternator whine I'm hearing will be significantly reduced if not completely eliminated, once I set up my stereo this way? I mean, given that the signal path from the PC to the H701 will be straight up digital, and there is no head unit to run any RCA cables, would this just about eliminate any chances of whine?


    3)I know this is a silly/n00b question, but speaking of the RUX/H701 combo, what kind of cable exactly runs between the RUX controller and the H701? Is it a typical DIN cable? And if so, are DIN cables analog or digital? Do they send an audio signal of any kind? If so, could the cable between the RUX and the PXA-H701 potentially contribute to alternator whine?

    Thanks in advance

  4. #374
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    1. No problems. The big volume knob on the controller is the best way to control the volume as it turns the signal down at the output of the processor right before the amps so at low volume the noise floor is super low.

    2. Yes. About the only way there would be alternator noise is if it comes from the RCA's going to the amps or if the amps are not grounded. You didin't say what power supply you have for the PC, but most of them do a good job of keeping the noise out. This should get rid of all the whine.

    3. It's not a typical DIN, it's a special cable Alpine came up with. They don't carry any music signals. You can even unplug the controller and the music will still play fine.
    1999 Black Pontiac Trans Am
    CarPC's in F-bodies
    How To Relocate Climate Controls on the 97-02 F-body Cars
    (AMD Sempron 3000+, Opus 150)
    Car PC system is out, Alpine system is in.

  5. #375
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    Quote Originally Posted by JasonWW View Post
    1. No problems. The big volume knob on the controller is the best way to control the volume as it turns the signal down at the output of the processor right before the amps so at low volume the noise floor is super low.

    2. Yes. About the only way there would be alternator noise is if it comes from the RCA's going to the amps or if the amps are not grounded. You didin't say what power supply you have for the PC, but most of them do a good job of keeping the noise out. This should get rid of all the whine.

    3. It's not a typical DIN, it's a special cable Alpine came up with. They don't carry any music signals. You can even unplug the controller and the music will still play fine.
    That pretty much seals the deal

    Thanks a lot Jason. You and Red and are a valuable asset to this forum and are great contributors of information. Only thing now is to find a place that a has a good deal on the combo. Ebay only has one set that comes with both units, and it's at $600. Is this a good price? Should I go for it?

  6. #376
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    Brains are selling for around $350 now and the controllers about $170.

    Check out these.

    http://cgi.ebay.com/Alpine-PHA-H701-...QQcmdZViewItem

    http://cgi.ebay.com/ALPINE-PXA-H700-...QQcmdZViewItem

    The 701 brain is mislabeled so it might go cheap. 700's have the green/orange controller lights. All the newer 701 controllers have blue lights.

    Excuse all the corrections.
    1999 Black Pontiac Trans Am
    CarPC's in F-bodies
    How To Relocate Climate Controls on the 97-02 F-body Cars
    (AMD Sempron 3000+, Opus 150)
    Car PC system is out, Alpine system is in.

  7. #377
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    Thanks I'll check those out.

  8. #378
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    Couple of Q's


    1)How would you rate the H701 on its stereo output sound quality? What kind of DAC is contained in the unit and how would you rate it? Is it up there with the more quality DACs found in external PC USB sound cards?

    2)Correct me if I'm wrong but ordinarily, the speaker amp would be powered by the radio/head unit. In my case however, since I won't be using an HU, how will my amp be powered? Can it be powered by the H701 in the same fashion as a normal HU? If not, what will I need to do?

  9. #379
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    Quote Originally Posted by isamu View Post
    1)How would you rate the H701 on its stereo output sound quality? What kind of DAC is contained in the unit and how would you rate it? Is it up there with the more quality DACs found in external PC USB sound cards?
    I'd say it's better than most consumer cards out there. Prosumer cards might be a different story though...I might put it on par with most of those.

    2)Correct me if I'm wrong but ordinarily, the speaker amp would be powered by the radio/head unit. In my case however, since I won't be using an HU, how will my amp be powered? Can it be powered by the H701 in the same fashion as a normal HU? If not, what will I need to do?
    ?? The Alpine has RCA outputs just like a head unit would have. Instead of going from a HU you would go from the 701 to your amps with RCAs.

    However, the amplifier doesn't get power from a head unit or a processer either way. It gets the audio signal from these. An amp is powered off of the battery in the car.
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  10. #380
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    Thumbs up

    Quote Originally Posted by RedGTiVR6 View Post
    I'd say it's better than most consumer cards out there. Prosumer cards might be a different story though...I might put it on par with most of those.
    Ahh good to know


    An amp is powered off of the battery in the car.
    That's what I was wondering. Thanks

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