Got in my new K11 R2R (NOT to be confused with the original, sigma-delta-based K11, which I’ve also owned in the past, as well as a K7) and I will say it now, there is no other DAC that comes close to the sound of this one for $160 USD MSRP. Absolutely none.
I first started listening to it by swapping it in my main listening chain, which consists of a HiBy R6 Pro II feeding a Gustard U18 DDC, sending audio over I2S to a Musician Draco DAC, which then feeds a Schiit Freya+ preamp, which has an SVS SB-3000 subwoofer and Fosi V3 Monos attached to it, driving a pair of KEF LS50 Metas, which are quite revealing speakers. Swapped the K11 R2R in place of the U18/Draco combo and frankly was utterly shocked at how close to the U18/Draco combo the K11 R2R sounded. The bass extension and resolution are better on Draco, but K11 R2R has better upper bass punch. K11 R2R is brighter, Draco is more relaxed. Both DACs are more treble-forward when set to OS than in NOS mode. Vocals are only slightly more transparent in Draco. Overall, 85% of the performance for 1/8th the price MSRP when comparing K11 R2R versus U18 + Draco combo. If that’s not a bargain, I don’t know what is!
Next, having been rendered confident that the DAC passes muster for the main role that I have for it, I set up the unit in my primary headphone chain upstairs in bed. As expected, wonderful, holographic imaging, smooth, natural presentation, truly organic sound when paired with the xDuoo TA-66 and a pair of modified HD 6XX cans. A perfect setup for winding down with before bed. I also hooked up my Monolith M1070C cans to the TA-66 for a listen, and still sounded great.
Finally, to get a taste of the integrated amplifier, I switched the K11 R2R to phone out mode instead of line out, and tested the DAC/amp using the M1070C closed back planar cans as well as a pair of Thieaudio Hype 4 IEMs. I listened on low gain through the 4.4mm balanced out with the IEMs and with high gain through the 6 1/4” single-ended out with the cans. In both cases, they sounded fine, but not particularly magical. It did still have the same smooth presentation, but it lacked the last bit of magic that only tubes can provide.
In summary, what you get with the K11 R2R is the best damn DAC money can buy for $160 USD MSRP. Along with it comes a perfectly confident but nothing special solid state amplification stage. I have owned and listened extensively to numerous R2R and resistor ladder DACs (Denafrips Ares II, Hifiman HM800, Musican Draco, Cayin models RU6 and the 1-bit RU7). So I know what is a mediocre (RU6) or even bad (HM800) R2R DAC can sound like, and I rank K11 R2R in the excellent R2R DAC category with the heavyweights like Denafrips or Musician. It is really that good. As for the amp, take it or leave it since it is nothing special. I’ve previously owned the K7 and the original K11, and sold them, because there’s nothing special about them. This unit is a keeper—this unit is special.
