Blown Speakers or ??

Cherokee_Outlaw
Cherokee_Outlaw Posts: 8
edited April 2010 in Troubleshooting
Yes, this is a "My dog ate my speakers story"...

I have a pair of LSi15s w/ a older PSW 500 sub. I'm powering the sub via a Denon 2809 receiver. The LSi15s are powered by a Emotiva XPA-2 Amp.

Last night I was watching the game when I ran up stairs to use the restroom. Before I knew it I heard the tv screaming louder and louder. Before I could get down the stairs I heard a slight noise that seemed like something went on the speakers. :( Now I hear sound but they sound just like tv speakers? Very hollow and flat. Both speakers sound the same.

Any ideas or are they just blown? The LSi15s are approx 5 year old.

Thanks for all the help.
Post edited by Cherokee_Outlaw on
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  • leroyjr1
    leroyjr1 Posts: 8,785
    edited January 2010
    Welcome to the Forum.

    Don't know what to tell you but when you get the problem fixed you should reset the max volume on your receiver. I have mine set so it'll only go so loud and will not blow anything.
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  • superjunior
    superjunior Posts: 1,632
    edited January 2010
    Cherokee_Outlaw wrote: »
    Yes, this is a "My dog ate my speakers story"...

    I have a pair of LSi15s w/ a older PSW 500 sub. I'm powering the sub via a Denon 2809 receiver. The LSi15s are powered by a Emotiva XPA-2 Amp.

    Last night I was watching the game when I ran up stairs to use the restroom. Before I knew it I heard the tv screaming louder and louder. Before I could get down the stairs I heard a slight noise that seemed like something went on the speakers. :( Now I hear sound but they sound just like tv speakers? Very hollow and flat. Both speakers sound the same.

    Any ideas or are they just blown? The LSi15s are approx 5 year old.

    Thanks for all the help.

    I would first look at the amp. try hooking a speaker to just the avr to better help isolate the problem
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    fronts - rti a9's
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    sub - polk dsw pro 600
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  • treitz3
    treitz3 Posts: 19,029
    edited January 2010
    Hello Outlaw and welcome to the forum. Put your ear directly up to the drivers on each speaker. Are all of the drivers working? It sounds to me like you might have blown the tweeters.

    Have you double checked all connections?
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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  • Polkersince85
    Polkersince85 Posts: 2,883
    edited January 2010
    Welcome to the forum. I agree, sounds like the tweeters and take the battery out of your remote control.
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  • Serendipity
    Serendipity Posts: 6,975
    edited January 2010
    Also set the receiver's limit to no more than 0db, that's what I have mine set to.
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  • danger boy
    danger boy Posts: 15,722
    edited January 2010
    ummm.. you need to have an exorcism performed on your receiver. that's very odd that the volume would just raise all by itself. i would say the receiver or your speakers are toast. mostly likely the some of the drivers in the speaker.

    still trying to think how the volume could be raised all by itself. do you kids or pets that could have maxed out the volume?
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  • kcoc321
    kcoc321 Posts: 1,788
    edited January 2010
    Dog Foot >>> remote, volume button >>> blown speakers :eek: :eek: :eek:
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  • BeefJerky
    BeefJerky Posts: 1,320
    edited January 2010
    I've actually had that happen before, and the cause was something I wouldn't have expected. I had an RCA (made by Pioneer, sold by RatShack) 5.1 receiver that I was using. After a couple of years, I noticed it would start raising the volume randomly by itself. Sometimes only a few notches, sometimes a lot.

    I tried standard things like checking the remote, but was still stumped. I was nearly ready to replace the receiver itself until I discovered the real cause: an aging compact fluorescent bulb. As many of you know, old fluorescent bulbs will start to flicker before they completely die. Well, apparently before you can see the flicker, they may still begin to flicker at higher frequencies that they eye can't pickup. Apparently, it was flickering in just the right way that it sent volume up commands to the receiver. Replaced the bulb and it has never happened since.

    In fact, my mom has that receiver now, and it's never done that since.
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  • Cherokee_Outlaw
    Cherokee_Outlaw Posts: 8
    edited January 2010
    kcoc321 wrote: »
    Dog Foot >>> remote, volume button >>> blown speakers :eek: :eek: :eek:

    :( Bingo! Actually she was laying on it looking at the tv wondering why it was yelling at her..

    I hooked the speakers back up to the receiver. The same thing.


    Thanks for all the help. Tonight watching a movie. The only way to explain it is they sound like nice TV speakers. no base at all... wait... let me check something..
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  • F1nut
    F1nut Posts: 50,554
    edited January 2010
    It's more likely that you blew the tweeters out rather than the woofers. Call Polk on Monday to purchase new ones.
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  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    LSI's have a 5 watt resistor in the high frequency circuit that tends to blow. Take the tweeters out and measure them with an ohm meter. If the resistance is around 3 ohms most likely you blew the resistor in the crossover.
    Keep us posted, and welcome to Club Polk.
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  • Cherokee_Outlaw
    Cherokee_Outlaw Posts: 8
    edited April 2010
    Hey everyone,

    back to trying to figure out the issue. I finally got around to hooking the tweeters up to the speaker cable. The tweeter is playing fine. I also took the crossover out from the back at least as far as I can and I don't see anything.
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  • Cherokee_Outlaw
    Cherokee_Outlaw Posts: 8
    edited April 2010
    I got one of the crossover out where I can see it. I don't see anything or smell anything that looks like it was fried.

    I took one of the mids out. I hooked it up to the tweeter wires and notta. So it seems the crossover is fried I guess.

    So I guess this is Good News... Bad News... & Good News..

    1st Good News.. Saved $200 by not having to buy tweeters!! :)

    BAD NEWS... Crossovers are fried.. :( cheaper but looks like a real PAIN IN THE ARSE to replace.

    2nd Good News.. Maybe I can put the $200 towards a nice pair of crossovers? :)

    Before I start towards that way, could I be missing anything else on why the tweeters are not working?
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