I have a soundbar that I might try out, but its one that has a power lead from the monitor, and I wasn't sure how to make it work without the monitor power....
On my test bench, I hooked the soundbar to the PC power supply (yellow and blackwires),
outside shell of the bar power plug was negative (black) on mine.
Im worried if this will place too much strain on the PS over time though.
My bar is rated for 12 volts at 1 amp.