Which Audiologic dac was the first to go 24 bit?

Hey - thanks to all you guys who've responded about tubes here. I will never ceased to be amazed at the level of knowledge you fellas possess for this hobby. Talk about feeling like a ditch-digger at an Aeronautical Engineering Society luncheon - sheesh!
Have a great weekend ...
Tom

Hoe does the transformer upgrade improve the sound?

I use a Wadia 270se with GNSC mods to drive my Audio Logic DAC-like to hear other Audio Logic owners chime in with the Digital IC their using

I've been using an Orchid balanced between my CEC & Audio Logic Dac with excellent results, like to try a couple others for comparison.

Powder - using a Jena Labs Valkyrie digital XLR between a Mephisto II transport and my M34 dac. I just kinda dove off into the deep end, so sorry to say can't really offer any comparisons. Other than to say all my CD's are quite listenable :-)