General Subwoofer question?

Question about a home theatre subwoofer?

• Hi, I purchased a Bass Acoustic Liquid Subwoofer from my father.I was playing my subwoofer through to my mp3 with an AUX cable,than all of a sudden,the subwoofer just gave up and didn't produce any bass at all. The Sub still had power and if i turned the crossover and volume full ball,the speaker sounded distort and still had a little bit of bass. So i disconnected the wires on the speaker leading to the main board and connected speaker wires straight from my stereo to the speaker itself and worked perfectly but not as good as when it's connected to the main board. I was just wondering if there is anybody that could help me with what the problem may be and where i can take it to get it repaired. I live in Sydney Australia in the suburb of Bankstown. I would highly appreciate it if someone can help on this as i was told this subwoofer retailed alone brand new for like $700 or something like that. Thank you and thanks for taking the time to read my essay question LMAO

• Answer:

  Okay first, you didn't blow out the drives if there is still sound coming from the sub woofer. second, any crossovers won't affect the loudness of the subwoofer, they deal with frequency of which the sub reproduces. and Third, and speaker is an inductor, so naturally it wants to move at faster speeds, even thousands of times per second. 99% of the time a subwoofer blows when the frequency is below its frequency range because the unconverted signal turns into heat, hence why they get hot. and subwoofers naturally cannot produce higher signals then 200-500 hz per second because their cones are too stiff and coils to big to move fast, so you would not hear anything, maybe dull vague vocals of the singer if you're lucky, and it would not affect them anyways. My guess is that its the amplifier output transistors blew, positive that is what the problem is. I've had the same problem at least 8 times, then I put some big transistors that can handle more heat to fix that. Hook the speaker up to ANOTHER separate system, and if it works, your sub is fine. Or get a multimeter, set it to ohms, Lowest sensitive setting, and test the speaker terminals to see if you are getting a 4 or 8 ohm load. if it reads infinite, OL, or blank screen, you have blown the speaker. try and see if its just a bad connection, inside the speaker, outside, diagnose instead of giving it to a repair shop who charge you a lot of money just for looking at it. if you know nothing of it, get it looked at by a good local electronics store. Hope I helped!