For the time being, I'm not planning to use the Tone2's balanced RCAs so I haven't ordered the cables, but last night I've been doing some intensive unbalanced-RCA A/B comparison against my (balanced) desktop S.M.S.L M200 DAC (a well-measuring one, although still "mid-fi" class, I guess): the tiny jewel's Sabre converters sounded brighter across all tests, with elevated mids and low-trebles compared to the M200's AK4497s, which in turn are thicker in the lower-mids region, giving some male vocals and some instruments' fundamentals the energy they deserve, without being overwhelming.
Incredibly enough to me, it felt like a tie in terms of dynamics, positioning and soundstage. I had the toughest of times picking a clear favorite: depending on the audio material, I leaned towards one, then the other, and back again...
Both DACs were feeding an xDuoo TA-20 hybrid amp, with Russian Tung-Sol 12AU7Ws taking care of the pre-amp stage, which in turn fed my HD6XX and oldies but goodies NAD + Canton amp and bedroom speakers.
Musical bliss all along with both, so my educated guess would be that unless the speakers (or headphones for that matter) are _markedly_ on the bright side of the moon, the Tone2 Pro will make your KEFs some very happy campers considering the size,
@captblaze !