Changing the cross-over settings after running Audyssey

I am a little bit confused on how Audyssey works. I looked at a lot of the posts, but I could not find the exact answer I was looking for. I just got my new Onkyo TX-NR808 and ran the setup last night. I am running Paradigm Monitor 7's and the Studio center up front and Atoms in all the rears. My subs are two Titanic 12's that I built powered by a Behringer EP-2500. After running the set up I checked all the settings. The Cross-over was set to 40hz on all the fronts and 50hz for all the rears.  What I am not understanding, I guess, is the way Audyssey works. If I now go and change the Cross-over settings to 80hz won't that screw up what Audyssey has already figured out? Or does it recalculate after I change the cross-over? or does changing the cross-over have no effect on what Audyssey has already corrected? Should I leave my fronts set to 40hz or change them to 80 as THX recommends. I realize that leaving them at 40 does not let me take advantage of Audyssey's better correction at lower frequencies but I am confused on whats happening after I change the cross-over point once the setup has been run. Thanks in advance as always. 

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33 Comments

  • 0
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    Kingyu

    Dear Chris,

    I think 90% people doing the calibration on their AVR don't know this, so they will miss something by using the default crossover setting by MultEQ.

    Is that a good idea to add a procedure before Subwoofer Level Matching, to let user input the low-end frequency of each speakers? If MultEQ knew these info first, it can analysis more and better about the sound lower than the speaker capacity as standing wave and acoustics problem?

  • 0
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    Kingyu

    Dear Chris,

    Another problem effected by standing wave is subwoofer. The Subwoofer Level Matching needs to turn the subwoofer volume to match 75dB. But in most case, the measure level will be higher than the subwoofer volume because of adding standing wave.

    I do the calibration about 10 times with Onkyo and 1 time with Pro Kit, and the results are same. My subwoofer is SVS PB13-U, powerful enough and no compromise. Factury default volume is -20dB.

    PB13-U volume -33dB, measure level 76~77dB, Trim +4.5dB (other chanels -3dB ~ -5dB), feel bass not enough.

    PB13-U volume -28dB, measure level 81~82db, Trim 0dB (other chanels -3dB ~ -5dB), feel bass good but more will be better.

    PB13-U volume -20dB, measure level very high(forgot), Trim -12dBdB (other chanels -3dB ~ -5dB), feel bass too much. Is standing wave too much?

    I am thinking to set the volume -23dB ~ -25dB, in order to let the Trim set about -3dB ~ -5dB as other chanels. Will it be the best? ;-)

    Hope Audyssey will find out better way to get to the best.

  • 0
    Avatar
    Audyssey Labs

    There is no need to input the low frequency limit of the sub.  Audyssey finds it and stops correction below that point. But, it's the in-room roll off that it finds. The theoretical one doesn't matter.

    Also I think you are expecting something different from Audyssey. When you say "feel that bass is not enough" this is your personal preference.  Audyssey doesn't know your preference. It only knows the studio reference and the calibration is adjusted to match that.  If you want more bass it's OK to raise the level, but you will no longer be at reference.

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