There are some updates to the c421, with the new black faceplates and a new internal tweak! Details here: http://blog.jdslabs.com/?p=419
Edited by putente - 9/24/12 at 4:43am
You can order just the new black front plates, for around $20 shipped!
And I'd like to know what effects or differences in sound does the new internal change has:
John, care to explain, please?
I think it's just for the black front plates, didn't know of any new internals
I think it depends on the kind of sound you want. On the JDSLabs c421 page you have the following under "Customization":
I think it pretty much tells you what you need to know to make your decision! I have the OPA2227 version and I like it very much...
Exactly, it's smoothness versus detail I think. I prefer the smoothnes (OPA2227)