Improvement? Depends on how much your willing to spend. The Node works just fine as a preamp. The question of volume control was addressed on the Bluesound Forum a couple of years ago with the previous generation (Node 2):
"We attenuate and do not alter"
Here's a link to that short thread if you care to read it:
https://helpdesk.bluesound.com/discussions/viewtopic.php?f=4&t=3113&p=12251&hilit=volume+control&sid=f0880c84af2646441a3720a2f3716d48#p12251
"We attenuate and do not alter"
Here's a link to that short thread if you care to read it:
https://helpdesk.bluesound.com/discussions/viewtopic.php?f=4&t=3113&p=12251&hilit=volume+control&sid=f0880c84af2646441a3720a2f3716d48#p12251