speakers for lm3875

alizawi · 30th March 2006, 06:51 PM

anyone know where i can get a single 8 ohm speaker to test one channel of my lm3875 amp? All the ones i looked at are too expensive, I just need something for testing/demonstration purposes.

Oh by the way, quick question about my transformer, mine has 4 primary leads..do I tie the 0's together and the 115's together?

thanks

Ali B.

leadbelly · 30th March 2006, 07:45 PM

Quote:

Originally posted by alizawi
anyone know where i can get a single 8 ohm speaker to test one channel of my lm3875 amp? All the ones i looked at are too expensive, I just need something for testing/demonstration purposes.

Personally, I wouldn't even use a new $20 driver to test an amp I had just put together. I would just use something old I had on hand. If you don't have anything like that, just vist your closest thrift store.

alizawi · 30th March 2006, 11:27 PM

thats what I tried to do, but none had the right speakers......gotta keep looking i guess

Nordic · 31st March 2006, 05:02 AM

Man, even a cheap car speaker will do, the one I use for testing is so old, its got tears in, its still good enough to tell me the amp can run for an hour or two, without being dangerous.

I have even seen newly completed things work for a while and then go nuclear... because I forgot to put a heatsink back...
A quick test and swap over to the big speakers would have been a dissaster.

alizawi · 31st March 2006, 09:42 PM

anyone got comments about my transformer question?

leadbelly · 31st March 2006, 11:24 PM

Quote:

Originally posted by alizawi
Oh by the way, quick question about my transformer, mine has 4 primary leads..do I tie the 0's together and the 115's together?

Yes, if they are indeed factory labelled as such.

alizawi · 1st April 2006, 01:08 AM

yeah thats how they're labeled

30th March 2006, 06:51 PM	#1
alizawi diyAudio Member Join Date: Feb 2006 Location: California	speakers for lm3875 anyone know where i can get a single 8 ohm speaker to test one channel of my lm3875 amp? All the ones i looked at are too expensive, I just need something for testing/demonstration purposes. Oh by the way, quick question about my transformer, mine has 4 primary leads..do I tie the 0's together and the 115's together? thanks Ali B.

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30th March 2006, 11:27 PM	#3
alizawi diyAudio Member Join Date: Feb 2006 Location: California	thats what I tried to do, but none had the right speakers......gotta keep looking i guess

31st March 2006, 05:02 AM	#4
Nordic diyAudio Member Join Date: Sep 2005	Man, even a cheap car speaker will do, the one I use for testing is so old, its got tears in, its still good enough to tell me the amp can run for an hour or two, without being dangerous. I have even seen newly completed things work for a while and then go nuclear... because I forgot to put a heatsink back... A quick test and swap over to the big speakers would have been a dissaster.

31st March 2006, 09:42 PM	#5
alizawi diyAudio Member Join Date: Feb 2006 Location: California	anyone got comments about my transformer question?

1st April 2006, 01:08 AM	#7
alizawi diyAudio Member Join Date: Feb 2006 Location: California	yeah thats how they're labeled

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