Polk Fxi A4 Tweeter

pawelmwo
pawelmwo Posts: 137
edited December 2019 in Troubleshooting
Trying to diagnose an issue on my surrounds. While watching Shrek and he yells at the town folk with pitchforks I can hear the audio distorting in my rear right speaker. It sounds like it's coming from the tweeter when I put my ear to it. I tried running a sweep from 80 to 20,000 Hz in REW but didnt detect any issues. The speaker has two tweeters it definately sounds like it's coming from there. I guess order a replacement and try to swap it out.

Any thoughts? What other test tones can I run? Thanks!
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Comments

  • F1nut
    F1nut Posts: 50,542
    Have you considered it's the sound track?
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • pawelmwo
    pawelmwo Posts: 137
    edited December 2019
    F1nut wrote: »
    Have you considered it's the sound track?

    I thought about that so I played it through headphones (Westone UM Pro30), using the blu ray drive on my PC. Couldn't detect any issues. The audio track is TrueHD so it should be lossless. I'll try swapping the L and R speakers and see if it still happens.
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  • pawelmwo
    pawelmwo Posts: 137
    I'm at a loss. I replaced the tweeter and it still occurs. I also swapped the other rear speaker with the one I felt was broken but it still happened. I can't hear it when only listening to LCR disconnecting the surrounds. :#
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  • pitdogg2
    pitdogg2 Posts: 25,437
    Have you looked at the xo? Anything look crispy?
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  • pawelmwo
    pawelmwo Posts: 137
    pitdogg2 wrote: »
    Have you looked at the xo? Anything look crispy?

    I have not. But what are the chances both have issues with the xo? I didnt think I was pushing the speakers either being -15dB from reference.
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  • pawelmwo
    pawelmwo Posts: 137
    I think I'm going back to what @F1nut mentioned. When I force Multi Channel Stereo at the same volume I get no distortion. So it definately seems like something in those SL or SR channels when playing back the 7.1 track. So far that's the working theory. Is there any software that will allow me to listen to the channels independently over headphones or something?
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  • gp4jesus
    gp4jesus Posts: 1,987
    Try swapping with another channel, any Channel. If it moves, either it’s the amp or something to do w/the source processor, sound track, or decoding.
    Samsung 60" UN60ES6100 LED Outlaw Audio 976 Pre/Pro Samsung BDP, Amazon Firestick, Phillips CD Changer Canare 14 ga - LCR tweeters inside*; Ctr Ch outside BJC 10 ga - LCR mids, inside* & out 8 ga Powerline: LR woofers, inside* & out *soldered LR: Tri-amped RTi A7 w/Rotels. Woofers - 980BX; Tweets & “Plugged*” Mids - 981, connected w/MP Premiere ICs Ctr Ch: Rotel RB981 -> Bi-amped CSi A6 Surrounds: Premiere ICs ->Rotel 981 -> AR 12 ga -> RTi A3. 5 Subs: Sunfire True SW Signature -> LFE & Ctr Ch; 4 Audio Pro Evidence @ the “Corners”. Power Conditioning & Distribution: 4 dedicated 20A feeds; APC H15; 5 Furman Miniport 20s *Xschop's handy work
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  • pawelmwo
    pawelmwo Posts: 137
    edited December 2019
    I've extracted the rear right channels using some audio tools anyone care to take a listen to determine whether this would push some speakers to their limits? it does sound kind of poor on my earphones. I've all but isolated this issue to this one damn movie.

    Surround Right: https://drive.google.com/open?id=1Vgec-LeGtfohl5WzvB074aFCJPrLvmFQ

    Back Right: https://drive.google.com/open?id=1SSYvshmdSPQCm6kDR2_NdNhozrGPr-bf

    Update: SR sounds crunchy when played in Stereo mode on my towers. So I guess I answered my own question bad source.
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