The only DAC in their line to both accept and output 24 bit signals up to and including 192 is the Pagoda. Here’s a quote from Head Fi member s1rrah who did a nice comprehensive review of the Pagoda a couple of years ago.
Secondly, the Pagoda DAC is a true 192khz/24 bit design, both receiving a signal in 192khz/24bit while also outputting in 24bit format. All previous PCM56P DACs released by MHDT Labs have been limited to 16bit output, with some (like the Havana 2 and Stockholm 2) being capable of at least receiving 192khz/24bit signals. But even though some might be able to accept this high resolution signal, all have been limited to 16bit output; this is simply an inherent limitation of the PCM56P DAC. -- s1rrah
I believe their other DACs output to either 16/44.1 or 16/48 depending on input (i.e., 24/44.1, 88.2, 176.4 = 16/44.1 out and 24/48, 96, 192 = 16/48 out). This is how my Tranquility works with high-res material. Not sure about their 20 bit Atlantis however, which uses an Analog Devices chip.