Monitor 75 damage

astronomical
astronomical Posts: 9
edited December 2013 in Troubleshooting
When I connect to just the top two posts I get no sound ( I was testing my hypothesis). I know my friend hooked them up improperly and was clipping while running thru only the top posts.

What is damaged? Should replacement tweeters fix this? If so, what model tweeter? Are the top posts dedicated solely to the tweeter?
Post edited by astronomical on
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  • astronomical
    astronomical Posts: 9
    edited December 2013
    Top terminals
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  • VR3
    VR3 Posts: 28,641
    edited December 2013
    The top post go to the tweeter network -

    It could be the tweeter or the crossover. Are both speakers damaged? If not, you can swap the tweeters between both speakers and see if it follows the tweeter or stays with the speaker.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • astronomical
    astronomical Posts: 9
    edited December 2013
    Yes. He blew them both. I'm worried about the crossovers. I'd hate to buy new tweets only to find out there is bigger issues.
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  • VR3
    VR3 Posts: 28,641
    edited December 2013
    Usually when modern Polk crossovers blow it is a resistor and it is very obvious...

    I would take the rear terminal cup off and visually inspect the crossover...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • astronomical
    astronomical Posts: 9
    edited December 2013
    Thanks. The XO is destroyed. Its very obvious. Where can I buy replacements?
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  • codyc1ark
    codyc1ark Posts: 2,532
    edited December 2013
    Pics?!?
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  • astronomical
    astronomical Posts: 9
    edited December 2013
    Ok. Here is some pictures. The tweeters are blown and the XOs are fried. Any assistance in finding these parts would be greatly appreciated.
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  • tonyb
    tonyb Posts: 32,962
    edited December 2013
    Wow...haven't seen toasted crossovers like that in along time. May I ask how this happened ?

    VR3 can take care of you, but this looks like a total rebuild, not just a resistor....which will cost some. Then your not sure about the tweets on top of that.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • VR3
    VR3 Posts: 28,641
    edited December 2013
    Hmm... actually that is pretty normal for the modern day Polk crossovers. The crossovers pretty much self destruct to save the drivers. Granted that one is an extreme case.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • astronomical
    astronomical Posts: 9
    edited December 2013
    "I know my friend hooked them up improperly and was clipping while running thru only the top posts."

    My understanding is he was only hooked to the top terminals and his weak onkyo receiver was clipping and shutting off. Rather than figure out the problem he just turned it back on and kept doing it repeatedly. He has more money than common sense. I doubt he even looked at the 4 page manual.

    That being said, what kinda dollar amount am I looking at to fix them?
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  • codyc1ark
    codyc1ark Posts: 2,532
    edited December 2013
    I had posted earlier, but I don't know where it went. Anyway, call Polk's CS and key them in on the situation, let them know that your a member here and they will give you a discount. I don't have any idea what it will set you back, but I would also make sure that your woofers are O.K. before placing an order. Try a 9v battery and see if you get any movement, or even just lightly pushing on the woofer. Let us know how it's going, but CS will get you going in the right direction.
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  • astronomical
    astronomical Posts: 9
    edited December 2013
    Sounds like I'd have to mail them back. Quite frankly, if its over $125, including the tweeters, I'd rather just flip them as is with full disclosure. I have zero investment in them right now. He just said keep them.
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  • VR3
    VR3 Posts: 28,641
    edited December 2013
    I would just order new crossovers from Polk, would be under $100
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • pitdogg2
    pitdogg2 Posts: 25,441
    edited December 2013
    the magic smoke has left the room.....
    man that is incredible!! My son is a little like that on his gear I had to warp:mad: him a few times to get my point across.
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  • tonyb
    tonyb Posts: 32,962
    edited December 2013
    VR3 wrote: »
    I would just order new crossovers from Polk, would be under $100

    Maybe, plus you won't know about any damage to the tweets which would be close to another 70-100 bucks with shipping.

    I would be more inclined to can them, buy a used set of speakers for a couple hundies. Maybe sell the remaining woofers and cabinets.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • astronomical
    astronomical Posts: 9
    edited December 2013
    I spoke with Ken at Polk and he took care of me. I'd have to agree that Polk has amazing customer service and treats people very well. Thanks for the help everyone.

    Also, regarding the tweeters, I hooked them up to another speaker to test them and I'm sure they're blown. No worries though, everything is being sorted.

    Polk has my utmost respect.
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