I would be very leery about using the Art Audio, and perhaps any amp with volume control sans preamp. I wanted Joe Fratus to install a volume control on my Carissa, asking about my preamp (Joule Electra LA-100 MK.III), he advised against it.
I suspect running any source direct to amp would result in a thin sound, also lacking in dynamics. The pot Joe uses also slightly degrades the sound, something like the DACT volume control would likely be a better choice.
I suspect running any source direct to amp would result in a thin sound, also lacking in dynamics. The pot Joe uses also slightly degrades the sound, something like the DACT volume control would likely be a better choice.