opa627-work well with exactly 12 volts?
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HD-5000

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How will a pair of burr-brown opa627s work with an 8 AA cell pack? (in a meta)
 
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wow, this thread seems an awful lot misplaced...

oh all-powerful moderator, here my cry
 
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skippy

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imho, not very well. you'll get get sound out of it, but i don't think it really starts to shine until you give it a bit more juice.
 
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Well, how about 2 9-volts arranged in series with another set arrangned in parralel?
 
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puppyslugg

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Quote:

Well, how about 2 9-volts arranged in series with another set arrangned in parralel?


FWIW, I used the series/parrallell arrangement with my cha47/ad8610 biased class A (constant current source). With the series/parrallel setup, you get both voltage and current needed to drive both low and high impedence phones. Though I did build 24v regulated supply that I used for my bedroom setup, and I like that better.
 
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I think you're asking the wrong question, HD. I think this chip will work well from exactly 12V. But then you say you're using batteries, which will only be at exactly 12V for about, oh, 3 minutes after turning the power switch on. They drop from there as they discharge.

I make this point because if you were to use a wall power supply that gave 12V, I wouldn't worry at all. Sure, a smidge more voltage might help a bit, but at 12V, you will have gotten rid of all the nasty clipping on high musical peaks with demanding headphones.
 
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