I have 3 fried plate amplifiers from powered subwoofers. I am quite certain of which components cooked on at least 2 of them and at least think I know what cooked the 3rd. It looks to be capacitors on one of them, resistors on another and possibly capacitors again on the 3rd. 2 of them are the exact same model, JBL Venue series Sub-12s.
One of them is quite obviously a capacitor by the visible signs of a catastrophic explosion which disintegrated the cap and left a significant burn hole on the board. Enough to melt a hole in it and the pathway. I've determined that this board is not repairable. Or at least beyond my abilities at present nor worth it to me otherwise.
The board from the other one is the one with obvious resistor failure. The 2 larger ones were also catastrophically destroyed. The leads and a skin like shell were all that was left of them. There are burn marks there on the board as well although not nearly as severe as the first one.
The 3rd one is from a Definitive Technology 10" sub that has signs of excessive heat in a couple of places on the board but no obviously exploded parts. The worst of them are in the area where a few things could be the issue but I think it's one of the ICs or the caps that are close to it in the worst of the overheated areas.
All 3 drivers are still fine, tested with a known working amplifier. I'm only interested in using one of the 12" JBL drivers as a non amplified sub. I have an amp and PSU that will drive it but it's a full range amp so I need a low frequency signal only for the sub which requires a high frequency filter. I'm not sure if that's actually what a crossover is called technically but in any case I'm quite certain that I have the components for what I need between the other parts on the boards.
I'm capable of soldering and salvaging the parts but I'm not clear on exactly which ones or how to build the path for them to work for what I need. Does anyone have a detailed explanation or able to at least point me in the right direction. I realize that I'll have to build it on a generic PCB and make all the pathways myself and I'm quite certain that I can if I have a road map of how the parts have to be connected and which ones I need.
So in short what I need is a list of parts and how to build a board in order to filter out the frequencies higher than say 150hz and lower than 30 or so or recommendations otherwise.
One of them is quite obviously a capacitor by the visible signs of a catastrophic explosion which disintegrated the cap and left a significant burn hole on the board. Enough to melt a hole in it and the pathway. I've determined that this board is not repairable. Or at least beyond my abilities at present nor worth it to me otherwise.
The board from the other one is the one with obvious resistor failure. The 2 larger ones were also catastrophically destroyed. The leads and a skin like shell were all that was left of them. There are burn marks there on the board as well although not nearly as severe as the first one.
The 3rd one is from a Definitive Technology 10" sub that has signs of excessive heat in a couple of places on the board but no obviously exploded parts. The worst of them are in the area where a few things could be the issue but I think it's one of the ICs or the caps that are close to it in the worst of the overheated areas.
All 3 drivers are still fine, tested with a known working amplifier. I'm only interested in using one of the 12" JBL drivers as a non amplified sub. I have an amp and PSU that will drive it but it's a full range amp so I need a low frequency signal only for the sub which requires a high frequency filter. I'm not sure if that's actually what a crossover is called technically but in any case I'm quite certain that I have the components for what I need between the other parts on the boards.
I'm capable of soldering and salvaging the parts but I'm not clear on exactly which ones or how to build the path for them to work for what I need. Does anyone have a detailed explanation or able to at least point me in the right direction. I realize that I'll have to build it on a generic PCB and make all the pathways myself and I'm quite certain that I can if I have a road map of how the parts have to be connected and which ones I need.
So in short what I need is a list of parts and how to build a board in order to filter out the frequencies higher than say 150hz and lower than 30 or so or recommendations otherwise.