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My question is this. In order to achieve a marked improvement in digital sound quality (and being that I enjoy the look and interface of the Rose) is there an external DAC you would recommend running the Rose through (as cost effective as possible - pre-owned or demo preferred) or is there a Streamer / Dac combo product that would be the smarter upgrade move.
HiFi Rose RS250 (Quobuz - Roon - Ethernet - HiFiRose) which is fed into a PrimaLuna Evo 400 Integrated into GoldenEar Triton One.Rs Cardas and Wireworld interconnects and cables.
you would need to describe in some useful detail the nature of sonic improvement you hope to gain from the move you are asking about... your system has a number of arguably positive synergistic pieces in place... sharp sounding front end into a mellow-ish tube amp, into fairly well balanced speakers... so where you want to go with the sound?
there are several variables... one would be to remove the cardas cable and gain more transparency and apparent treble detail... another would be to go to a solid state amplifier to gain slam and cleaner attack in how livelier types of music would play
as usual the more info you provide, the better chance you will get useful, targeted advice on changing equipment cost effectively