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Thread: Alpine PXA-H701 Questions

  1. #381
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    Quote Originally Posted by isamu View Post
    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?
    Are you talking about the remote line, or amplifier activation wire. The wire that tells the amps to turn on when +12V is sent through it. When using the H701 as a stand-alone unit it requires constant (yellow) and ground (black) as usual, but also requires a remote on or ign controlled (blue/White) wire. That Remote On wire activates the unit and also has an Remote Out wire (also Blue/White) that is used to activate the amps. Just remember to use a relay and properly fues it before sending it to the amps.
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  2. #382
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    just use a relay as the guy said above. wire to ignition.

  3. #383
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    Or if you want to control it manually, like I do (sometimes I don't want it on when I am driving), just add a toggle switch in line with the +12V.
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  4. #384
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    OK guys it's FINALLY done!!!!!!!

    Got my car back from Traffic Jamz in Encino on Saturday. Got the H701 in there and my PC connected to it via Toslink. Stuck some Hertz HSK-165s in there as well as an Audigy SRX-5 5 channel amp. Unfortunately no sub what so ever believe it or not....couldn't afford one

    Sounds VERY good so far! But there is one minor quibble, and I'm hoping Jason, either you or Red can explain it. There is a type of "buzzing" sound, as well as a "tweeeeen" or high pitch kinda "tingy/beep-y-like" noise. It's not alternator whine, although it only happens when I actually start the car. It's something else coming through the speakers...in fact it seems to be coming only though the passenger side speakers.

    Do any of you guys know what is causing this? Could it be from the connections between the H701 and the Audison amp? I am using VERY good 4ft RCAs between the two, and as mentioned above, only a single TosLink digital connection between the PC and the H701.

    There are also two USB extention cables running from the PC in the trunk to the front part of the back seats, but I doubt that has anything to do with it.

  5. #385
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    You will need to check how everything is run...this is one of the big downsides to having someone else do your install.

    What RCAs are you using...VERY good doesn't tell me very much. Some people consider the base line Monster cable to be a VERY good cable...

    Are your RCAs run next to any power or ground wires? Using an optical connection should theoretically mean the PC isn't the culpret...unless the PC is introducing it into the audio stream and then the optical cable is transmitting it.
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  6. #386
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    I just finished installing my system, including the PXA-H701 and DVA-9861 head unit. The sound is fantastic. I am a little disappointed, however, because it seems the DVA-9861 cannot select between the three optical inputs. After reading the PXA-H701 manual, I have come to the conclusion that only the RUX-C701 is able to do this:



    "Only when using the control unit sold separately"

    The main reason I went with this head unit is because I thought I would be able to select between all three optical inputs. Does anybody know of a way to do this?

  7. #387
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    Quote Originally Posted by RedGTiVR6 View Post
    What RCAs are you using...VERY good doesn't tell me very much. Some people consider the base line Monster cable to be a VERY good cable...

    They are Reference MKIII...the very thick kind with gold plated and sheilded tips.

    Are your RCAs run next to any power or ground wires?
    I'm not sure...I will ask the installer tomorrow.

    Using an optical connection should theoretically mean the PC isn't the culpret...unless the PC is introducing it into the audio stream and then the optical cable is transmitting it.
    Yeah, the CarPC is not the culprit. I turn it off and the sound is still there....but only while the engine is actually running. I remember reading something from Jason a few pages back regarding some sort of ground noise being caused by his H701, so maby that has something to do with it. I can say that it's definitely coming *ONLY* from the front mids and tweets. I don't hear it through any other speakers.

    It's weird

  8. #388
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    Quote Originally Posted by isamu View Post
    There is a type of "buzzing" sound, as well as a "tweeeeen" or high pitch kinda "tingy/beep-y-like" noise. It's not alternator whine, although it only happens when I actually start the car. It's something else coming through the speakers...in fact it seems to be coming only though the passenger side speakers.
    The first thing that pops into my head is that you may be picking up noise through the passive x-over. The inductors in them are much more sensitive the the surrounding magnetic fields than the RCA cables. If the shop mounted the passenger side x-overs in the kickpanel it's probably too close to some factory wires. So check for factory wires right next to the x-overs wherever they may be.


    Quote Originally Posted by vihila View Post
    The main reason I went with this head unit is because I thought I would be able to select between all three optical inputs. Does anybody know of a way to do this?
    As Turbo said earlier, the optical inputs always get priority over the analog. Whenever the H701 see a signal on one of the optical inputs it selects it. What Turbo did was use or make a optical switcher. 3 cables go in, 1 comes out to the H701. We talked about them a ways back in this thread. You would probably have to reach for the knob and turn it to select which source the H701 would see.

    I have the Alpine W200 Multimedia unit which seems to control almost everything the RUX controller does, but I have seen a input select option. It may be a RUX option only.

    Quote Originally Posted by isamu View Post
    I remember reading something from Jason a few pages back regarding some sort of ground noise being caused by his H701, so maby that has something to do with it.
    I don't remember that. Maybe it was someone else or a different issue besides a ground noise.
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  9. #389
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    Quote Originally Posted by JasonWW View Post
    The first thing that pops into my head is that you may be picking up noise through the passive x-over. The inductors in them are much more sensitive the the surrounding magnetic fields than the RCA cables. If the shop mounted the passenger side x-overs in the kickpanel it's probably too close to some factory wires. So check for factory wires right next to the x-overs wherever they may be.
    Thanks bro. I will tell him about this manayanner. Hopefully it's a problem that will be quickly eradicated.

    Jason since I got you here, and since I just got my H701, can you quickly tell me if there's an easy simple way to give the rear speakers a bit more fill, and make 'em juuuust a notch louder?

  10. #390
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    You probably read my post where I'm running into noise on the front channels...which I still am...it's just a known issue with some of hte 701 processors unfortunately.
    Jan Bennett
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