GuJuMaN89 Posted October 22, 2007 Posted October 22, 2007 ok so i was watching a movie with the family, and randomly the sub stops working and the light goes out. so i go over to check it out, and out of the port, there is smoke coming out lol what can cause this? we werent playing it very loud at all, and it is not turned up all the way either. Share this post Link to post Share on other sites More sharing options...
exeter_acres Posted October 22, 2007 Posted October 22, 2007 All electronic things run on the mysterious blue smoke..... when the smoke falls out....they stop working... really, thats all there is Share this post Link to post Share on other sites More sharing options...
oblivescence Posted October 22, 2007 Posted October 22, 2007 All electronic things run on the mysterious blue smoke..... when the smoke falls out....they stop working... really, thats all there is That belongs on the front page as one of those random quote of the days. Share this post Link to post Share on other sites More sharing options...
romeo55 Posted October 22, 2007 Posted October 22, 2007 That's kind of like saying "My car started smoking and stopped working, does anyone know why this would happen?" Could really be anything, especially when we don't even know the model. Share this post Link to post Share on other sites More sharing options...
oblivescence Posted October 22, 2007 Posted October 22, 2007 You might want to check the amp or receiver or whatever was powering the sub, because there is a good chance some damage was dealt to it, especially if it was bad enough to turn off the lights. or was there a light on the sub? You weren't putting allot more power to this sub than it was rated for right? Share this post Link to post Share on other sites More sharing options...
hardnrg Posted October 22, 2007 Posted October 22, 2007 open it up and look for the failed component(s), if they are too burnt to identify the values/model, then you'll need a schematic, replace them, that's about it or just buy a new one cheap components from crappy brands can cause device failure... but even good brands can have components that fail after many years of use (and abuse) Share this post Link to post Share on other sites More sharing options...
ronbo191 Posted October 22, 2007 Posted October 22, 2007 Have you tried the patch? It helped me to stop smoking. Share this post Link to post Share on other sites More sharing options...
Andrewr05 Posted October 22, 2007 Posted October 22, 2007 (edited) Maybe the sub has inadequate crossovers to filter out lower bass content? If the media you were playing had some lower bass that the driver couldn't handle and like stated above didn't filter it out correctly it could have caused it to over heat the driver or cause electrical damage to the driver thus causing amp failure. Plus the fact that most cheap "home-theater-in-a-box" setups have cheapo ported subwoofers which means it could have been heavily distorting and you wouldn't have even noticed, especially if the surrounds were covering up some of the sound as well... Have you tried the patch? It helped me to stop smoking. Edited October 22, 2007 by Andrewr05 Share this post Link to post Share on other sites More sharing options...
ir_cow Posted October 22, 2007 Posted October 22, 2007 did you make sure the OMS were correct. i know my receiver supports 4 and 8. if you got the wrong OMS going it can blow just about anything and it sounds like it was a low power sub running at somthing higher than it. i doubt it was 4 since only huge speakers use it. if it was an all-in-one pack , well there you go i'm not surprised it went. my system will be good for atlest anothing 10 years. its like saying i'll spend $70 a year, in the long run its cheaper, longer lasting and better sounding. also a good suggestion to anyone, dont double up the speakers or it will go. Share this post Link to post Share on other sites More sharing options...
Waco Posted October 22, 2007 Posted October 22, 2007 what can cause this? we werent playing it very loud at all, and it is not turned up all the way either. The amp in the subwoofer bit the dust. The driver itself is probably perfectly fine as long as the amp didn't send DC to the sub till it burned up (which usually only happens if an output transistor shorts out). It'll probably be cheaper to replace the sub rather than have someone repair it unless you have a friend who knows what he's doing. Share this post Link to post Share on other sites More sharing options...
Waco Posted October 22, 2007 Posted October 22, 2007 If the media you were playing had some lower bass that the driver couldn't handle and like stated above didn't filter it out correctly it could have caused it to over heat the driver or cause electrical damage to the driver thus causing amp failure. If it was playing infrasonic material without an adequate crossover they'd definitely hear it if it was ported. Nothing sounds worse than an unloaded sub since most will slam the voice coil into the backplate (think of a machine-gun like staccato of clangs). Generally things like that won't damage an amplifier either. did you make sure the OMS were correct. i know my receiver supports 4 and 8. if you got the wrong OMS going it can blow just about anything and it sounds like it was a low power sub running at somthing higher than it. i doubt it was 4 since only huge speakers use it. Please don't spread mis-information. First, it's ohms. Second, the wrong impedance will only harm amplifiers if you go below the minimum rating of the amplifier. Lastly, the size of a speaker has nothing to do with its impedance. Since it sounds like he has a sub with a built-in amp, I'd rule out any impedance related issues. Share this post Link to post Share on other sites More sharing options...
Andrewr05 Posted October 22, 2007 Posted October 22, 2007 If it was playing infrasonic material without an adequate crossover they'd definitely hear it if it was ported. Nothing sounds worse than an unloaded sub since most will slam the voice coil into the backplate (think of a machine-gun like staccato of clangs).If it was ported improperly (just a crappy boomy or humming like freq.) then it may have hidden the distortion... Generally things like that won't damage an amplifier either.In extreme cases it may cause electrical shortages which COULD cause amp damage... Share this post Link to post Share on other sites More sharing options...
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