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  1. #1

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    Default My 3.1 TL went up in smoke!!!!

    I'm at work and my daughter just called me to tell me that my right side speaker upstairs was making a very loud horrible sound and smoke was coming out of it.

    I'll take off from work at lunch time and go check it out.

    Well.....so much for leaving the *ucking system on all the time. I am not a happy camper.

    Joe
    Amplifiers: 1-SAE Mark IV, 4-SAE 2400, 1-SAE 2500, 2-SAE 2600, 1-Buttkicker BKA 1000N w/2-tactile transducers. Sources: Sony BDP CX7000es, Sony CX300/CX400/CX450/CX455, SAE 8000 tuner, Akai 4000D R2R, Technics 1100A TT, Epson 8500UB with Carada 100". Speakers:Polk SDA SRS, 3.1TL, FXi5, FXi3, 2-SVS 20-29, Yamaha, SVS center sub. Power:2-Monster HTS3500, Furman M-8D & RR16 Plus. 2-SAE 4000 X-overs, SAE 5000a noise reduction, MSB Link DAC III, MSB Powerbase, Behringer 2496, Monarchy DIP 24/96.

  2. #2

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    Sounds like your amp started to send DC current. Get the amp(s) checked before you fix anything on the speaker(s)

  3. #3

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    What Bill said, please have amp repaired before you use it again.

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  4. #4

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    Sorry to hear that. Please keep us informed on what you find. I leave my system on all the time and after hearing this I'm starting to get very concerned...
    _________________________________________________
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  5. #5

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    Good luck man,that sucks. I shut mine off. Was there a good reason to leave on all the time that I missed?
    2CH - Magnepan MGIIIA's, Rogue Audio Magnum 66 pre, Parasound HCA1200 MKII, Douglas Connection IC's and Cables, Oppo BDP-83SE

    Main HT - Adcom GFA7400, Rti70, Csi40, Rti28, Onkyo TX-SR705, Sony BDP-S1000ES, Signal Cable Analog 2 IC's, Mitsubishi 65" DLP, M&K 1250 THX Sub, Knu Koncepts cables

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  6. #6

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    Quote Originally Posted by daboyz View Post
    Was there a good reason to leave on all the time that I missed?

    Where were you during lesson 3?????
    _________________________________________________
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    Thank God for different opinions. Imagine the world if we all wanted the same woman

  7. #7

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    Bill nailed it. Sorry to hear about this. That's definitely a bummer. :(
    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.

    The best way to enjoy digital music reproduction is to never listen to good analogue reproduction.

  8. #8

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    Quote Originally Posted by Ricardo View Post
    Where were you during lesson 3?????
    Smokin' crack with my homies.
    2CH - Magnepan MGIIIA's, Rogue Audio Magnum 66 pre, Parasound HCA1200 MKII, Douglas Connection IC's and Cables, Oppo BDP-83SE

    Main HT - Adcom GFA7400, Rti70, Csi40, Rti28, Onkyo TX-SR705, Sony BDP-S1000ES, Signal Cable Analog 2 IC's, Mitsubishi 65" DLP, M&K 1250 THX Sub, Knu Koncepts cables

    Mini HT - Samsung 46" 3D TV + 3D Blu ray player, HK AVR 254, Rti8's, Athena 12" sub

  9. #9

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    Joe,

    I don't think you should be kicking yourself over this one.

    If an amp went south right in front of your eye's, I don't feel you could have prevented damage to a speaker. Direct DC of 50-60 volts from an amp will damage a speaker in no time.

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  10. #10

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    Just got home and checked it out......Jesus H. Christ!!!! The right side is ALL toast including the tweeter. Smells real bad too. Tried pushing in the drivers on the left speaker and one or two have the scratchy noise. Which ones are affected from the opposite side with the SDA cable?

    Unplugged the speaker and turned the amp on. The right side LED's are pegged to the max.

    I gotta go back to work so I'll get into it later....maybe (I'm too depressed). Do you think the crossover is shot also?

    Man this is gonna cost me big time!

    Joe
    Amplifiers: 1-SAE Mark IV, 4-SAE 2400, 1-SAE 2500, 2-SAE 2600, 1-Buttkicker BKA 1000N w/2-tactile transducers. Sources: Sony BDP CX7000es, Sony CX300/CX400/CX450/CX455, SAE 8000 tuner, Akai 4000D R2R, Technics 1100A TT, Epson 8500UB with Carada 100". Speakers:Polk SDA SRS, 3.1TL, FXi5, FXi3, 2-SVS 20-29, Yamaha, SVS center sub. Power:2-Monster HTS3500, Furman M-8D & RR16 Plus. 2-SAE 4000 X-overs, SAE 5000a noise reduction, MSB Link DAC III, MSB Powerbase, Behringer 2496, Monarchy DIP 24/96.

  11. #11

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    Quote Originally Posted by joeparaski View Post
    Do you think the crossover is shot also?

    Joe

    Hate to break it too you but yes, and I question the left crossover also being that the sda cable would pass dc back through it.

    Speakers
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    RT800i's Rears
    Sub Paradigm Servo 15

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    Pioneer 84TXSi AVR
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  12. #12

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    Quote Originally Posted by Ricardo View Post
    Sorry to hear that. Please keep us informed on what you find. I leave my system on all the time and after hearing this I'm starting to get very concerned...
    I leave my system on all the time...when I am home....it gets shut down if I am leaving the house.



    Sorry to hear about your mishap joe , hope you get her cranking tunes again shortly. I am interested in the condition of the left crossover as well in regards to the SDA cable...good luck .
    The first rule of Fight Club is you don't talk about Fight Club

  13. #13

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    wow. dont have anything to offer but condolences. i feel your pain, man.
    i usually turn mine off, but not always, and have left everything powered up for days at a time (!).

    a
    gear list:
    1 down, 4 up....

  14. #14

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    Especially when a lot of us are running high powered amps that if they were human, would be old enough to drink in all 50 states and draw enough juice to dim the lights when we turn them on.
    The first rule of Fight Club is you don't talk about Fight Club

  15. #15

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    Quote Originally Posted by joeparaski View Post
    Do you think the crossover is shot also?

    Man this is gonna cost me big time!

    Joe
    Sorry to hear Joe, yes I can almost guarantee the x-over is toast. Look for used drivers and rebuild when you can. Be thankful you only lost some drivers and a few electrical components. That easily could have burned your house down.

    My gear is approaching the 20 year mark and while I've had no issue's I don't leave my system on as much as I used to for this exact reason. In the right circumstance even protection circuits can't protect.

    When I worked in audio we had a Polk 5B go up in smoke because our switching board went haywire. The grill cloth caught on fire and luckily we were able to rip it off and stomp on it to put the fire out.

    H9
    Last edited by heiney9; 05-14-2008 at 01:47 PM.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  16. #16

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    Wow Joe that really Sucks big time!, Thank God your Daughter was at home, it could have been worse.
    Polk Audio SDA SRS 1.2TL's
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  17. #17

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    Meeeerde!

    DC fed into a speaker? Hmmm....?

    The coil for the woofer might be toast, but I doubt it. The woofer's voicecoil should burn first. Any caps in the woofer section are likely okay. Any resistor should be replaced.

    As for the tweeter section, if there are no resistors before the first cap, there should be no damage to it.

  18. #18

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    Quote Originally Posted by ShinAce View Post
    Meeeerde!

    DC fed into a speaker? Hmmm....?

    The coil for the woofer might be toast, but I doubt it. The woofer's voicecoil should burn first. Any caps in the woofer section are likely okay. Any resistor should be replaced.

    As for the tweeter section, if there are no resistors before the first cap, there should be no damage to it.
    We are guessing it was DC, but until he gets the amp checked it could be something else. DC is the logical conclusion, but who knows for 100% certain.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  19. #19

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    Here's a link to the crossover schematics.
    http://www.polkaudio.com/forums/atta...7&d=1186346539
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  20. #20

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    Quote Originally Posted by joeparaski View Post
    I'm at work and my daughter just called me to tell me that my right side speaker upstairs was making a very loud horrible sound and smoke was coming out of it.
    This quote is the problem. DC should not have made sound. An oscillating amp WOULD though.

    Until the amp(and even pre-amp) can be checked, there's no telling.

    p.s. Thanks, Face. I'll check em later to see if there's anything funky in the crossover design.

  21. #21

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    My complete guess is a single or multiple output tranny took a dump by shorting out or going into thermal runaway, etc. He stated the channel in question has the output meter pegged when he powered it up without a load. DC usually doesn't cause that.

    But, that's my armchair analysis.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  22. #22
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    I agree with the sound. If you hook a 9v battery to the leads of a driver, you get no oscillation and thus no sound. I'm not ruling out DC, but it would have been pulsing or switched or something to create sound.

    Sorry of your loss man and good luck trouble shooting.

  23. #23

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    So sorry to hear. Hope you get all items back up.

    engtaz

  24. #24

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    DC would either throw the driver in or out to the extreme. The amount of power from the leakage would determine the extent of damage to the drivers. That's probably why he feels the scraping when he manually pushes them in. Some welding has been done unfortunately.
    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.

    The best way to enjoy digital music reproduction is to never listen to good analogue reproduction.

  25. #25

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    Joe,

    Let us know how many drivers burned up!

    I have at least (6) MW6503's & (5) MW611's in my storage room

    (2) of them are yours, just tell me which two and I'll mail em out to you.

    Sal
    Polk Audio SDA SRS 1.2TL's
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    Part Deux: http://tinyurl.com/lasareath3

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  26. #26

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    First of all, I want to thank you guys for your offer to help....I totally didn't expect that and I want to let you know that it is a heartfelt thank you and just strengthens my belief in the value of the Polk Community here.

    I'm not sure how to tell which are the 6503's or MW611's because the drivers all look the same. I took them all out of the speaker cabinet and marked their positions. The top two drivers move freely but have a strong burnt odor. The 3rd one is scratchy and smells burnt. The bottom one hardly moves and smells burnt. The lone driver on the right doesn't move at all and smells burnt. The tweeter is visually destroyed.

    I didn't take pictures of the drivers because visually they look normal. I removed the crossover and took a couple of pictures. The burnt smell is there but not as strong as the drivers. I don't know what to look for in terms of damage.

    Click image for larger version

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ID:	33239

    Click image for larger version

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ID:	33240

    Click image for larger version

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ID:	33241


    This is from the right speaker only, I haven't opened the left one yet.


    Joe
    Amplifiers: 1-SAE Mark IV, 4-SAE 2400, 1-SAE 2500, 2-SAE 2600, 1-Buttkicker BKA 1000N w/2-tactile transducers. Sources: Sony BDP CX7000es, Sony CX300/CX400/CX450/CX455, SAE 8000 tuner, Akai 4000D R2R, Technics 1100A TT, Epson 8500UB with Carada 100". Speakers:Polk SDA SRS, 3.1TL, FXi5, FXi3, 2-SVS 20-29, Yamaha, SVS center sub. Power:2-Monster HTS3500, Furman M-8D & RR16 Plus. 2-SAE 4000 X-overs, SAE 5000a noise reduction, MSB Link DAC III, MSB Powerbase, Behringer 2496, Monarchy DIP 24/96.

  27. #27

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    That tweet is definitely shot but the x-over appears to be ok. Minimal damage and a cheap fix if anything there.
    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.

    The best way to enjoy digital music reproduction is to never listen to good analogue reproduction.

  28. #28

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    Hey Joe.
    Looks like the boards are fine, and the inductors. The resistors can be burnt without any visible damage. Take an ohm meter, and read the resistance across the resistor. If you don't get a reading that matches the rating for that resistor then you are in luck. Now that you have it apart its a good time to upgrade the XO. At least replace the 2 12uf's per side, and replace the resistors with Mill's. That 2ohm 25watt doesn't appear to be stock. Double check the other speakers XO to see if it has the same setup.

    BTW the 6511 is the sigle dimensional driver, and the 6503's are the stereo drivers.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  29. #29

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    I'd say if the "sand" resistors aren't discolored and the PC board looks fine you might be alright. Many times the resistor gets hot underneath and that's where the discoloration is. That's what I found on my 5B's after the resistor was removed. Your's look normal, even the slightly cooked one in my 5B had a slight brownish discoloration on the top.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  30. #30

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    That sucks Joe. Hope all works out.
    Michael ;)
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