Returning to this post after originating it, I remain convinced that the USB input of the LS50W is not as pleasing a source as their RCA inputs fed by a listener's preferred mid-range or higher DAC.
I also feel that the absence of a passive crossover (and the presence of driver-tuned bi-amplification) greatly exceeds any deleterious effects of digital resampling in the speakers when run this way, as compared to the passive LS50s run with same DAC (and no ADC>DAC conversion) and even a high-end amplifier.
To recap: streamer to DAC to LS50W exceeds streamer to LS50. Streamer to DAC to LS50W also wins hands down against streamer to DAC to pre/amp to LS50. I have made these comparisons with numerous units in the system, and these results are consistent for me. YMMV.
I also feel that the absence of a passive crossover (and the presence of driver-tuned bi-amplification) greatly exceeds any deleterious effects of digital resampling in the speakers when run this way, as compared to the passive LS50s run with same DAC (and no ADC>DAC conversion) and even a high-end amplifier.
To recap: streamer to DAC to LS50W exceeds streamer to LS50. Streamer to DAC to LS50W also wins hands down against streamer to DAC to pre/amp to LS50. I have made these comparisons with numerous units in the system, and these results are consistent for me. YMMV.