No I have not, but I can say this. With my XMC-1 I tried the Intona both with and without the Singxer in the loop, I much preferred the Intona alone vs with the Singxer. Tim Connor at Kitsune also stated the Intona had, or has considerably more effect than the Singxer and that they approach USB in different ways. There was no reason to doubt what he was saying.
I would be very surprised if you installed an Intona and not be surprised at the improvement. For those implementing a computer based music server with USB connection the Intona in my humble estimation has to be the current bargain of the decade, and they have the measurements to back this up.
I don't want to say too much at this point about the Holo but did get a chance to listen last night for a couple of hours. It sounds very nice, extremely smooth, yet detailed on all music I played both 16/44 and higher resolution. I did not employ any over sampling and kept the unit set to NOS (non over sampling) throughout. I'm inclined to say its just to the warm side of neutral thus far, has a wide, deep and immersive presentation. I want to point out the Singxer was in the loop outputting I2S to the Holo, but I also want to try it with just the Intona feeding the signal to the Holo.
I'm not a big believer in components taking hundreds of hours to break in and at the risk of offending some people feel this notion is a bit preposterous. However I do think changes occur with most components (especially transducers, ie speakers, cartridges etc) over the first day or two albeit fairly incremental. Have another busy day today, but will should have time again this evening to see what changes might have occurred. Like all solid state gear I leave them on 24/7 including the Holo. It does stay warm to the touch, the case being the thermal relieve given that the entire thing is 5mm thick on all sides. Suffice it to say its built like a tank, not a tin can.
