I bought a Modibit a month ago and returned it because it didnt work out for my intended purpose; bought Gumby instead. Gumby has been warming up for the last 24 hours (bought it used). I really like the way it sounds combined with the Beta22. ERC3 > Gamma3 as DIR > Gumby
The digital implementation of the y3 (USB, SPDIF) is superior to the Gumby. The Gumby doesn't have the same level of galvanic isolation, digital input isolation, and dedicated power supplies of the y3. I crutch the Gumby via CDTransport and/or using the y3's DIR. Gumby doesnt have USB3 like the yggy
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I noticed that the Balanced output sounds better than the SE RCA outputs. My Torp3 (Single ended inputs) sounds better out of the y3. My B22 which is balanced only sounds amazing out of the Gumby. Honestly i am thinking of putting Jensen transformers on the Gumby's Xlr outs or building a Active balanced to SE conversion using Alpha24's.
The y3 is warm as the Gumby. I would say it's a notch warmer than neutral. It is not as warm/smoothed as the AudioGD NFB-11 that i heard.
From a absolute neutral perspective (if your an analog lover, or have digital allergy), the Gumby or this family of DAC technology (yggy included) have superior tonality just like the focal Utopia has superior tonality to the hd800x. Cymbals sound almost perfect out of the Gumby due to the 'correct tonality'.
The y3 is more aggressive than the Gumby, which is supposedly laid back in comparison. Both are tolerable using HD800S
I definitely hear the moffat digital filter doing its thing on the Gumby. It seems to slice up/stratify the details into neat layers and insert some blank space in between each stratum so that each is clearly defined in position. It's quite cool but maybe a little unnatural. My analogy would be like Photoshop layers overlapping vs a nice flat image - a single microphone recording a whole band in a room vs each instrument individually recorded and pasted together. it's a really cool effect. Ymmv
For details and resolution the y3 tends to be extremely detailed outright through brute force and contrast of its "blackground" against the digital tonality (crisp and edge). My analogy for this is a "tonal brightness" similar to the stock HD800 that helps it force the details out. The Gumby uses that digital filter to get details out, the space between the layers make details stand out and easier to pick out. Two different methods to skin a cat.