What is the take on the HiRes provider Acoustic Sounds? Are they generally offering HiRes directly from master tracks or is much of the material they offer pure upsampling from 44/16 ? Are there any good suggestions as to solid HiRes providers of popular pop/rock music?

Interested to hear about experience running this with RCA versus XLR. Any big difference and if so what is the preference?

After using Lambda Signatures for years I just got a used O2 and it is excellent. I am contemplating the next equipment upgrade currently using the following:   Cyrus CD8x as transport Cyrus DAC-XP as dac Stax SRM-T1 power cable main Nordost Valhalla with wireworld as individual unit...