There is unlikely to be enough discussion in single threads for these old timers, but I think it's worth starting a thread here for vintage DACs. The most interesting ones to me are old school R/2R converters. The two I've owned so far are the Monarchy 18B (technically the new version) that uses AD1860 chips and now an Assemblage DAC-2 (same as TransDAC) that uses PCM1702 chips. I know some folks like @Clemmaster have several old school DACs, and @RAZRr1275 snagged the Sonic Frontiers DAC I've wanted to hear for some time from @purrin. The Monarchy 18B is a really excellent vintage sounding unit. Very warm with good overall detail. It's also a preamp, which is really nice if you need the volume control. It's limited to 44.1/48kHz. The Assemblage DAC-2 is very good for the price and is actually a pretty compact DAC even for today's standard. Similar dimensions to a Bifrost but 2-3 inches deeper. I just got this thing in 15 minutes ago so it's hard to comment accurately just yet, but it is pretty impressive for the price.