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Old 9th November 2005, 11:44 AM   #1
Progg70 is offline Progg70  Sweden
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Cool Build a really good 3A current source in the speaker stage?

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.
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Old 9th November 2005, 12:01 PM   #2
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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.

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Old 9th November 2005, 08:05 PM   #3
Progg70 is offline Progg70  Sweden
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Iím 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 ?
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Old 9th November 2005, 09:03 PM   #4
anatech is offline anatech  Canada
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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
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Old 10th November 2005, 11:54 AM   #5
Progg70 is offline Progg70  Sweden
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Thanks but itís not easy to find anything about it. Any more directly link?
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Old 10th November 2005, 03:20 PM   #6
Progg70 is offline Progg70  Sweden
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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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Old 10th November 2005, 03:29 PM   #7
eLarson is offline eLarson  United States
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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.
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