Build a really good 3A current source in the speaker stage?

Progg70 · 9th November 2005, 11:44 AM

If you would build a really good current source that have a high current, 3A in the speaker drive stage. See the picture; how could it look like.

janneman · 9th November 2005, 12:01 PM

A current source is not that complex, many discussions here on this are in the Pass Labs area. But I guess you REALLY want an amplifier with the current source as the last stage, no? That would be a single ended amp, again the Pass labs area abounds with such designs. And other threads also. Spend half an hour on searches, and you should get an idea how to do it. Then if neceesary ask pointed questions.

Jan Didden

Progg70 · 9th November 2005, 08:05 PM

I’m looking for a single end amp.
Thanks for the tip to look in the pass section but I have never been impressed about it after listen to a pass amp I Oslo. I had a old Nelson pass pre amp who I liked for a long time ago.

Can you give me a hint for my search ?

anatech · 9th November 2005, 09:03 PM

Hi Progg70,
Go to the Pass forum under amplifiers. These designs are not like the earlier Threshold stuff (I do like them). Some of the new designs are exactly what you asked for.

Just click here .

-Chris

Progg70 · 10th November 2005, 11:54 AM

Thanks but it’s not easy to find anything about it. Any more directly link?

Progg70 · 10th November 2005, 03:20 PM

It seem that the interest for the subject is bigger here than at pass labs, so please give me some good advise for a good current source.

eLarson · 10th November 2005, 03:29 PM

Try searching for "current source amplifier" along with "high-efficiency loudspeakers". It should take you to an article or two on FirstWatt.com. The first two FirstWatt amps have current source-outputs.

9th November 2005, 12:01 PM	#2
janneman diyAudio Member Join Date: May 2002 Location: Where Germany, The Netherlands and Belgium meet Blog Entries: 6	A current source is not that complex, many discussions here on this are in the Pass Labs area. But I guess you REALLY want an amplifier with the current source as the last stage, no? That would be a single ended amp, again the Pass labs area abounds with such designs. And other threads also. Spend half an hour on searches, and you should get an idea how to do it. Then if neceesary ask pointed questions. Jan Didden __________________ /New Linear Audio publication: Baxandall & Self on Audio Power!

10th November 2005, 03:29 PM	#7
eLarson diyAudio Member Join Date: Aug 2002 Location: Gaithersburg, MD	Try searching for "current source amplifier" along with "high-efficiency loudspeakers". It should take you to an article or two on FirstWatt.com. The first two FirstWatt amps have current source-outputs. __________________ Would a woodchuck bother to chuck MDF?

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9th November 2005, 08:05 PM	#3
Progg70 diyAudio Member Join Date: Jul 2004 Location: Sweden	I’m looking for a single end amp. Thanks for the tip to look in the pass section but I have never been impressed about it after listen to a pass amp I Oslo. I had a old Nelson pass pre amp who I liked for a long time ago. Can you give me a hint for my search ?

9th November 2005, 09:03 PM	#4
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Progg70, Go to the Pass forum under amplifiers. These designs are not like the earlier Threshold stuff (I do like them). Some of the new designs are exactly what you asked for. Just click here . -Chris

10th November 2005, 11:54 AM	#5
Progg70 diyAudio Member Join Date: Jul 2004 Location: Sweden	Thanks but it’s not easy to find anything about it. Any more directly link?

10th November 2005, 03:20 PM	#6
Progg70 diyAudio Member Join Date: Jul 2004 Location: Sweden	It seem that the interest for the subject is bigger here than at pass labs, so please give me some good advise for a good current source.

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