I have an old ACI Titan II sub that was making a very loud buzzing sound. Woke me up in the middle of the night. I put my hand on the speaker and it was loose. Not the screws that hold the casing but the cone with the rubber surround became detached from the casing? I turned over the sub and using some black silicone adhesive I re adhered the speaker to the casing. It moves well when pushing it in with my fingers. I also read the coil with an ohmmeter and it read 4.7 ohms. I'm assuming it's good?
I decided to pull out the amp and have a look at it. The amp has a big toroidal transformer and two Nichicon LQ (M) 6300uF 63 wv caps that both were a little bulged at the top. One a little more than the other. I decided to replace them with two Nichicon LS (M) 6300uF 63 v (not wv).
Getting the old caps out (snap-in and solder) was a little difficult but it seems I was able to do it without destroying the circuit traces as I have done in the past with other pieces of equipment. Put the new one's in and all I get is the unit powers on but the woofer does not respond to any signal.
Any ideas what is wrong? Could I have damaged something while replacing the caps or was something else damaged when the woofer became detached and was making that loud buzz for I don't know how long until it woke me up?
I'd appreciate any help. I'd hate to have to get rid of it when it may be just a simple fix.
Thanks, Nick
I decided to pull out the amp and have a look at it. The amp has a big toroidal transformer and two Nichicon LQ (M) 6300uF 63 wv caps that both were a little bulged at the top. One a little more than the other. I decided to replace them with two Nichicon LS (M) 6300uF 63 v (not wv).
Getting the old caps out (snap-in and solder) was a little difficult but it seems I was able to do it without destroying the circuit traces as I have done in the past with other pieces of equipment. Put the new one's in and all I get is the unit powers on but the woofer does not respond to any signal.
Any ideas what is wrong? Could I have damaged something while replacing the caps or was something else damaged when the woofer became detached and was making that loud buzz for I don't know how long until it woke me up?
I'd appreciate any help. I'd hate to have to get rid of it when it may be just a simple fix.
Thanks, Nick
Never mind. I noticed on one of the capacitor leads that I removed there was something that looked like more than just solder. I removed it and realized that it was part of the circuit board hole. Apparently, I pulled it out while removing the Cap. I did a quick repair and now everything is working fine.
Not sure but after removing the new caps again and doing the repair I saw on a Youtube video it's working fine now. It's a big 12 in. incursion woofer with a 250 w rms amp. It's a good sounding subwoofer in a very nice furniture-like cabinet. Didn't want to part with it.
On another subject, very much looking forward to visiting Cascais. My wife and I were literally packed for a trip to Portugal before the Pandemic hit.😡
On another subject, very much looking forward to visiting Cascais. My wife and I were literally packed for a trip to Portugal before the Pandemic hit.😡
At high power, it can cause the voice coil to overheat/melt or produce such a strong mechanical response to the signal so as to distort the shape of the coil or cone. But a low power signal will be within the operating range of the speaker.