Threshold sa12e

Michele · 29th January 2009, 07:25 AM

I'd like to buy a pair of them, do you think i could have problems with 20 years old objects?

jacco vermeulen · 29th January 2009, 10:09 AM

My nextdoor neighbor drives a Bentley classic, but he still needs to renew tires and brakes, his H2 Hummer is likely to fall apart sooner.

The SA/12e has 68 TO3 output devices of 250W each per channel, makes 17,000W total Pd, the load fraction of the output stage(s) is so low that it may outlive you.
Refreshing the electrolytic big cans will be due after 20 years, an exchange of 2 times 250,000uF will be costly.

Michele · 29th January 2009, 11:02 AM

Yes, but the question is: new capacitors, different sound?

Zen Mod · 29th January 2009, 11:04 AM

Quote:

Originally posted by Michele
Yes, but the question is: new capacitors, different sound?

is it better than "tired capacitors , tired sound "

once upon a time ..... these capacitors were new .......

jacco vermeulen · 29th January 2009, 03:22 PM

Quote:

Originally posted by Michele
new capacitors, different sound?

The old ones will be worn down, or as good as there.
The heftier the amp, the bigger the difference of a re-can, ime.
Why i gave the car analogy, old tires on a 2-1/2 ton car constitutes a bigger problem.

Going through regular channels, an exchange of 16 let's say Cornell Dubilier CGS electrolytic cans in the 40kuF whereabouts range will easily amount to €2K

steenoe · 29th January 2009, 04:41 PM

Quote:

Originally posted by Michele
Yes, but the question is: new capacitors, different sound?

New caps? better sound is the answer. Dont even doubt it

If it was me, I would simply swap the caps, with Rifa's of same (or better) rating. At least as good as originals, probably better

The low notes get flabby and tired, with worn out psu caps.

Danish · 29th January 2009, 10:41 PM

I have a pair of SA/12e and I can just say: go for it! They are really great power amps.

Michael

Michele · 30th January 2009, 06:18 AM

But too expensive

Nelson Pass · 30th January 2009, 08:28 PM

I have a complete service manual for the SA12e, which I will post
when the passdiy site passwords get straightened out, so watch
for it here.

Danish · 2nd February 2009, 12:55 AM

Looking forward to that Nelson

Cheers,
Michael

29th January 2009, 07:25 AM	#1
Michele diyAudio Member Join Date: Oct 2005	Threshold sa12e I'd like to buy a pair of them, do you think i could have problems with 20 years old objects?

29th January 2009, 10:09 AM	#2
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	My nextdoor neighbor drives a Bentley classic, but he still needs to renew tires and brakes, his H2 Hummer is likely to fall apart sooner. The SA/12e has 68 TO3 output devices of 250W each per channel, makes 17,000W total Pd, the load fraction of the output stage(s) is so low that it may outlive you. Refreshing the electrolytic big cans will be due after 20 years, an exchange of 2 times 250,000uF will be costly. __________________ Looks like Sponge Bob has killed another thread.

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29th January 2009, 11:02 AM	#3
Michele diyAudio Member Join Date: Oct 2005	Yes, but the question is: new capacitors, different sound?

29th January 2009, 10:41 PM	#7
Danish diyAudio Member Join Date: Apr 2004 Location: Silicon Valley	I have a pair of SA/12e and I can just say: go for it! They are really great power amps. Michael

30th January 2009, 06:18 AM	#8
Michele diyAudio Member Join Date: Oct 2005	But too expensive

30th January 2009, 08:28 PM	#9
Nelson Pass The one and only Join Date: Mar 2001	I have a complete service manual for the SA12e, which I will post when the passdiy site passwords get straightened out, so watch for it here.

2nd February 2009, 12:55 AM	#10
Danish diyAudio Member Join Date: Apr 2004 Location: Silicon Valley	Looking forward to that Nelson Cheers, Michael

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