I have a Topping E30 DAC connected to Presonus Eris 3.5 and a small Yamaha subwoofer. Nothing crazy but super clean to work and listen to music.
Tutuapp
I’ve had the Q990B in a room about your size and it easily fills the space with clear sound and strong bass. Dialogue clarity is definitely better than the older systems I had, and setup is much simpler than separates. The only downside for me is the rear speakers need good placement to really...
Had a similar issue after moving gear—sometimes just flipping a plug or relocating a power supply changes the grounding behavior. If signal ground fixes the hum, I’d roll with it, but yeah, grounding gremlins can be weirdly inconsistent.