Which Audiologic dac was the first to go 24 bit?


Jerry said the old chips would be used if they were still available.
128x128tabl10s
I think it was the 2400; I got a late model 34, and it had the 20-bit chips. Some of us upgraded our Model 34s to install the 24 bit chips.
Rcprince is correct.
I'm keeping my M34 DSM in original form (except for special tubes) to me it sounds absolutely fantastic,
(mine was Jerry's own personal unit a while back)
Newer is not always better, just different, sometimes worse, depending on ancillary equipment & preferences.
The difference in sound was not really that much at all, and Jerry told me that before I made the switch; I only did it because I expected Classic Records to release a lot of great DADs (which they didn't) and because I liked the Purcell upsampler (which I still like, but after taking it out I think it added too much noise to the signal and lost some of the AL's delicacy) which could output a 24-bit signal. Unless you have a source that sends out a true 24-bit digital signal you're better off with the 20-bit chips, which Jerry apparently felt were very good. In my case, the 24-bit chips still are a plus, because I am friends with a couple of recording engineers (one professional, one amateur) who have 24-bit/96khz machines, so I can listen to their master tapes through my unit.
I don't think he's going to install the 20 bits. If you guy's don't know, the Altis is a Bitstream machine.