New variation of the Crack with modifications. I've created an album of more pictures called the Crack C-4 version ( https://www.head-fi.org/gallery/album/crack-c-4-version.1154954/ ). C-4 as this is my 4th Crack build. I also have a Mainline, Crack-a-2-a and S.E.X. headphone amps. I'm...

Wow! I'm coming in late to this party - what's with the switchy thingy boards? Tell me more - dual inductors? I've know what you did with the white and gold caps - what's with the blue? Very cool! :beerchug:

Confessions of a Crack addict... My last post (from what I can find) was back in 2013. Since then I've built a stock Crack that didn't stay stock but got sold and I kept what I refer to as the BAC or Big A$$ Crack - the plate above reminded me of it. The goal was to create enough space with a...

Thanks!  And ya...that wallet thing hurts!!  I had most of the 12's from a prior and current preamp but the 6a's were all a new experience.  Just picked up a 5998 from the 'bay.  Very excited to get that in and see if there really is magic in that tube.

Can I play?!! I have a Crack with Speedball upgrade and other up'd parts.  I've ran through the following 12AU7's and variants. RCA cleartops CBS Hytron 12au7 CBS Hytron 5814 5963 "Black Pearls" Siemens 5814 triple mica Amperex 12au7 Amperex 7316 Valvo E80CC   The Amperex 7316 and...