Ahhh, the Dr Z Carmen Ghia. It's long been ranked as one of the best sounding boutique amps available. It's an all out take on the classic Marshall 18 Watt, great for any rock tones you need but with a clean headroom that gives the amp some versatility. Here's the description from the Dr Z Website:
"At first glance, the Carmen Ghia looks rather, well, modest. This is why the Ghia leaves so many people floored from the first note. Clean notes come out with a warmth, complexity, and sustain like one has never heard from such a small amp. Every note has a hugeness to it that seems far beyond an 18 watt head. All this comes before the amp really starts to sing. As you turn the Volume clockwise, the fun factor increases. The big clean notes get even BIGGER than they were before. Sustain becomes as smooth and musical as you have ever heard it. Notes seem to sing forever. This is an incredibly fun amp, and you'll have trouble putting your guitar down. The Carmen Ghia interacts with the player because the player can feel the power tube distortion.
This amp has become a favorite in recording studios around the world. It's also a great little amp for small clubs. While many other small amps have trouble cutting through the mix and have a rather flatulent low end, your Dr. Z Carmen Ghia will always cut through the mix tightly and musically."
Here's a demo video of the Carmen Ghia in action:
Here's the schematic file ("The Phoenix Project"):
And here is the verified layout:
For this build you'll need some transformers right? The 18 Watt (Marshall) style transformers from: http://www.mojotone.com will work perfectly....
[Here's some guts of a real Dr Z Carmen Ghia]
[Here's a completed build (Dan_Mask's I believe..) build using the above layout]