Yep!

Can someone tell me how a Retro 30 is in a Closed Back 1x12?  I have an Orage Dual Terror and a PPC112 loaded with a Vintage 30.  I'm looking for clarity and punch without becoming muddy.  The V30 is pretty muddy and has the infamous icepick midrange.  I also need a speaker that sounds great with high gain palm muting.  Is the Retro 30 my perscription or maybe something else?

You sound right on track ... & I think the Ret 30 is best suited to closed back.