Which DAC as a preamp?

Have had the DDP-1 and the M6S. The latter blows most DACs (from Ayre, PS Audio, Chord) out of the water in terms of retrieving ambient cues and resolution of depth. It is dynamic, tremendously low in noise and listening fatigue, tonally balanced (if a smidge cooler than the Audio Alchemy), and genuinely believable, in a way few components ever are, I think there’s something special about this iteration of Musical Fidelity’s DAC. I have not tried the earlier ones but understand they’re not quite this special. I’m keeping it alongside my Lampizator; it’s that good. I keep coming back to that cathedral like soundstage and realism. 

SPL Director, dcs Elgar Plus, dcs Delius, NAD M51

Cary 600.  Friggin awesome as a stand-alone with a 3 volt outputDoes it all and sounds fantastic.   Based on AKM 4497 Dac set. 28 lb beast. All sorts of digital ins and outs. Roon , Mqa, integrated SD card reader. It is sweet  and you will never tire of listening to it 

just never worked for me without a pre. that said the mytek manhattan has an analog pre and is a very good dac. 

@shadorne , @transience, I too expected my very mellow balanced tube preamp to tame the highly analytical M6S for a perfect match. On SOME recordings -- notably those originally analog mastered -- it works splendidly despite subsequent remastering. (Example: Keith Olson's 1975 "Fleetwood Mac" eponymous album remastered in 2017). But on more recent, digitally mastered material with substantial high-frequency content, the M6S's 768 upsampling screams like a banshee, cackling right past the tubes when coupled with RCA-terminal coax. Have not yet tried using USB or optical (M6S has no AES input), but if those don't tame it, I've got serious trouble. 

Any hints? Maybe I will start a new thread if a different coupling doesn't help.