You can improve the Bluesound by swapping out the stock PSU with: https://www.ebay.com/itm/Bluesound-NODE-2-2i-upgrade-low-noise-PSU-interface/324146967047?hash=item4...
Then power it with a good 5V linear power supply.
Also upgrading your Ethernet chain makes a huge improvement such as a Gigafoil V4 (powered with a 5V LPS) and Network Acoustics ENO with a high quality Ethernet cable.
If you decide to go with an external DAC and use coax the iFi SPDIF Purifier 2 (powered with a 5V LPS) also makes a nice improvement.
Everything matters when it comes to your digital front end.
-Alex
Then power it with a good 5V linear power supply.
Also upgrading your Ethernet chain makes a huge improvement such as a Gigafoil V4 (powered with a 5V LPS) and Network Acoustics ENO with a high quality Ethernet cable.
If you decide to go with an external DAC and use coax the iFi SPDIF Purifier 2 (powered with a 5V LPS) also makes a nice improvement.
Everything matters when it comes to your digital front end.
-Alex