Sonos Connect with Wyred4Sound digital output board modification. This was purchased new from Wyred4Sound. For those using Sonos with an outboard DAC, this is a substantial upgrade (upgrade affects digital output only). I used and enjoyed these for a while in two different systems, but have a large digital library and ran into the Sonos indexing limit of 65K tracks. This is the version with output upsampled to 24/96. Take your pick or buy both. See the link for more information.
https://wyred4sound.com/products/upgrades-and-mods/sonos-connect-modified $500 shipped in the continental US
