[computeruler]

I'm a noob at this and I'm building one. I was thinking the ad8397 or opa2228. I know I mighf need a soic to dip adapter. So how would those work in a cmoy? Would I have a hard time getting it stable or whatever? Oh and my headphones are shure 840s. Thanks

 

[Beftus]

The ad8397 is a difficult opamp to tame. Requires a specially designed PCB. Want a ad8397? Make a Mini3. Want a cmoy? Start with a cmoybb PCB, pop in a OPA2132 or OPA2134 and take it from there.

 

[Fred_fred2004]

If you want a layout for a AD8397 cmoy type I have one I made for my self and a friend, you're welcome to the layout and circuit, but the board you'll need to make yourself (I use toner transfer)

 

[joe_cool]

NJM4556A will put out 70ma, works at low voltages, and costs less than a dollar.

 

[weibby]

I like opa2227 and opa2107

2227 is more transparent and dynamic where else 2107 is a warmer mids centric but still have about 80% of the dynamic nature of 2227.

AD823a is very punchy and aggressive, if thats your thang.

 

[Spacehead]

Quote:

Originally Posted by joe_cool /img/forum/go_quote.gif NJM4556A will put out 70ma, works at low voltages, and costs less than a dollar.

I second this

AD8620 is excellent too.

 

[computeruler]

Will the AD823a work in a regular designed cmoy?

 

[tangent]

Yes, but it's not a great choice due to its low output current.

See my Notes on Audio Op-Amps

 

[computeruler]

Oh well how about the opa2227 then? Will that be good with the cmoy?

 

[Beftus]

A OPA2227 will work fine. An assembled cmoybb from jdslabs.com comes with one pre-installed.

 

[renlute]

computeruler,
 
opa2227 seems to be a standard opamp for a cmoy. For instance, those built by JDS Labs and biosciencegeek.
 
But have you had a look at:
 
http://www.head-fi.org/forum/thread/432749/the-opamp-thread
 
and
 
http://www.head-fi.org/forum/thread/243642/best-sounding-cheep-op-amp-for-cmoy-s-opa2227-opa2228-ad8066-other