Just got my CDM today. Lovely looking thing and great build quality.
I'm sitting here A/B-ing with the Hugo (using an iPhone 6 > camera connection kit > USB - micro USB; listening to Tidal 16/44 tracks; > outputting to Earsonics Velvets with upgraded Effect Audio cable, single ended. I'm also trying the Velvets with a Wagnus balanced cable into the 2.5mm input on the CDM). Low gain setting on CDM.
First impressions:
The Hugo definitely has more hifi clarity. I assume some of that comes down to the better (albeit by small margins) DAC. The CDM feels more musical and has greater pace and energy.
The mids are definitely more forward with the CDM - I'm a fan of tubes in my guitar amps, so I would've been shocked if the CDM didn't feel warmer than the Hugo. The CDM definitely feels more like being at a gig or a club, or being your own movie soundtrack than the Hugo. The Hugo is more like reference listening to a very high quality recording.
I find the single ended output of the CDM at least as enjoyable as the balanced output.
So far (literally just an hour), very happy with the CDM as a great choice to give a different flavour to the Hugo.
I ordered an extra set of tubes for the CDM (Raytheon 6111WA) but don't really want into tube rolling yet. Would welcome any advice on best tubes though. I generally listen to guitar-based music. (Having said that, Daft Punk's "Get Lucky" sounds AMAZING through the CDM - the compression you get from tubes really takes it to another level above the already fantastic sound on the Hugo.)
I'm going to leave the Hugo alone for a few days and just stick to the CDM, to see what 'brain burn in' reveals. Bearing in mind my remarks on synergy with IEMs, I'm keen to try some other UIEMS with the CDM, as I think there's still room to get the absolute best out of it with the right pairing / synergy. Any thoughts on great pairings?
it would also be interesting to try the CDM with a really good DAP where the DAP does DAC duties and the CDM does amp duty (how does one connect for that? Just using a 3.5mm - 3.5mm out of the DAP and into the CDM's 3.5mm input?). I was going to splash out on the Sony XZ2 but might hold out for the new Onkyo. I own an AK120 but not interested in the 240 or 380 as no Tidal.
Edit: AK120 into CDM (3.5mm single ended out from AK into 3.5mm input on CDM on high gain) vs AK120 into Glove A1 single ended, listening to 16/44, 24/44: tough call. Both really good. CDM wins with live albums.