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    Digital Time Alignment for Clarion

    Hello, i have just had a cz702a clarion head unit installed in my bmwx3 and its really good but i don't understand how digital time alignment works, it doesn't explain it in the user manual and the installer didn't know either, can anyone explain how it works?

    the measurement system is 0 - 501.4cm per speaker whatever that means.







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    Re: Digital Time Alignment for Clarion

    If I remember correctly its how far away the speaker is from the driver, so you set it how you want/like.



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    Re: Digital Time Alignment for Clarion

    Your furthest speaker should have 0 delay as it will be the last to "hit" your ears. The closest should have the most delay. The object is to have the sound from all speakers arrive at your ears at the same time. I'm limited on time right now to do the search, but google time alignment and you'll find what/how to do the math to get you in the ballpark. the rest is actually how it sounds to your ears.




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    Re: Digital Time Alignment for Clarion

    So the moral of the story is the closer the speakers to yourself the more you add delay i take it.

    for example i should leave all speakers at 0 and add between 0-501.4 for the drivers speaker.




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    Re: Digital Time Alignment for Clarion

    Quote Originally Posted by bmwx3 View Post
    So the moral of the story is the closer the speakers to yourself the more you add delay i take it.

    for example i should leave all speakers at 0 and add between 0-501.4 for the drivers speaker.
    you front drivers side should have the most delay followed by usually the passenger front then the drivers rear and leave the passenger rear at 0

    but its really up to your ears



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    Re: Digital Time Alignment for Clarion

    what i do is create an excel table that tells me what the difference in distance is between the closest speaker and every other speaker.

    so, for each channel, measure the distance from your head to the speaker voice coil. then figure out the difference between each speaker relative to the shortest distance. that is what you use in the head unit for settings.

    after that, you can tweak to shift the sound stage in horizontal and vertical position. this is best done with a test disc, like the IASCA discs. using any random song isn't useful. if you don't have a test disc, you can listen to some select songs on a home reference system, where you can sit perfectly equidistant between some nice monitors. then take notes on the sound stage (instrument placement, singer and backup singer placement, etc). then listen in the car.

    i've found it's best to start with measurements, then tweak from there.



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    Re: Digital Time Alignment for Clarion

    here is my spreadsheet


    "mono" delay is for two seats. equal left and right T/A.

    then i tweak from there.



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    Re: Digital Time Alignment for Clarion

    Taken from the Eclipse manual:






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    Re: Digital Time Alignment for Clarion

    things that throw off the sound stage and make the measurement method inaccurate:

    *specular reflections off glass
    *poor crossover point choices
    *inaccurate level setting
    *speaker aiming/off-axis response/grill attenuation
    *diffraction due to mounting



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    Re: Digital Time Alignment for Clarion

    Actually my drivers side rear is located up near the inside top hinge of the door so its actually closer than the drivers front to my head, currently im experimenting. To be honest i have no idea if any of the other stuff you mention is OK or not, the manuals for these are not what i call user freindly, infact i also have no clue how the adjustment of the custom equaliser works but ill leave that for another day i think.




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    Re: Digital Time Alignment for Clarion

    For anyone who wants the KHA spreadsheet you can download it here:

    KHA_Time_Dela_-Calculator2012.xls



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    Re: Digital Time Alignment for Clarion

    Clarion got clever and did their time alignment in in/cm instead of ms, so people don't have to do the conversion. Keep this in mind when following instructions from a different manufacturer.




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    Re: Digital Time Alignment for Clarion

    So whats the theory with cm?

    Feel free to give an example.




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    Re: Digital Time Alignment for Clarion

    Quote Originally Posted by keep_hope_alive View Post
    here is my spreadsheet


    "mono" delay is for two seats. equal left and right T/A.

    then i tweak from there.
    Sorry to bring a dead thread back to life... but... what is the formula for mono delay? This would optimize TA for driver and passenger correct?

    I download the spreadsheet, but the mono isn't included.

    Thanks!




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    Re: Digital Time Alignment for Clarion

    Quote Originally Posted by OldManBass View Post
    Sorry to bring a dead thread back to life... but... what is the formula for mono delay? This would optimize TA for driver and passenger correct?

    I download the spreadsheet, but the mono isn't included.

    Thanks!
    the mono delay is just equal left and right and based on pathlength differences to the driver's side relative to the driver's seat. an alternative method is to base it on pathlength differences of the passenger side relative to the driver's seat. experiment.



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