Hello All!!
I've just tested an old Yamaha YST SW40 sub, and it's playing very very deaf quiet sound - I know that while servicing it by my friend there was a short-circuit. My question is how can I check if the driver is burnt??
While testing I gave it almost 30Watts on output from amp and you could here almost no sound...
waitin' for hints
Greets,
I've just tested an old Yamaha YST SW40 sub, and it's playing very very deaf quiet sound - I know that while servicing it by my friend there was a short-circuit. My question is how can I check if the driver is burnt??
While testing I gave it almost 30Watts on output from amp and you could here almost no sound...
waitin' for hints
Greets,
I had one like that once. It was an organ speaker. As it turns out, the manufacturer misaligned the voice coil gap intentionally, so as to pinch the voice coil so it wouldn't make LF sounds. It was amazing; a 12" paper tweter and it actually sounded pretty good.
Anyway. I had to remove the pole piece in order to make the thing work again, but by that time the driver was useless because it was inefficient, and too leaky to make into a passive radiator, so I tossed it.
*shrug*
Anyway. I had to remove the pole piece in order to make the thing work again, but by that time the driver was useless because it was inefficient, and too leaky to make into a passive radiator, so I tossed it.
*shrug*
tested with battery - working!!!
As proposed I've tested it with 5V baterry and the cone is working well, after some test with amp directly connected to driver it works!!! Happily only the internal amp is damaged, I've checked also the transformer and it's ok, so now there is a time for some sub amp to do that will be able to deliver some 50Watts to driver
- is it okay to use some chips for subs like lm1875 bridged mode, or lm3875/3886???
...maybe some other simple solution as there is no need for high power.
Thanks for all replies!!
Greets,
As proposed I've tested it with 5V baterry and the cone is working well, after some test with amp directly connected to driver it works!!! Happily only the internal amp is damaged, I've checked also the transformer and it's ok, so now there is a time for some sub amp to do that will be able to deliver some 50Watts to driver
- is it okay to use some chips for subs like lm1875 bridged mode, or lm3875/3886???
...maybe some other simple solution as there is no need for high power.
Thanks for all replies!!
Greets,
I'm delighted that your driver pulled through. That's what you call "touch and go".
Steve
PS: maybe you should try the Solid State forum for your chips question.
Steve
PS: maybe you should try the Solid State forum for your chips question.
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