You hear a hip hop radio station playing? I bet that was pun intended ... I can’t imagine your amp has a hidden AM/FM receiver built in. :)
Is it proven as a fact that the ’lousy’ mains cabling in you house is the source of the interference, or is that still an assumption? Mains cabling is lousy in any house ... long unshielded copper wires in a plastic tube.
Do you still hear it with all cables unplugged but for the speakers? Do you hear it with your headphones?
It could be a costly mistake if after installing a PC the problem isn’t gone. I'd try to get one with a money back guarantee. Unless of course you like to expand your setup with a PC anyhow.
Is it proven as a fact that the ’lousy’ mains cabling in you house is the source of the interference, or is that still an assumption? Mains cabling is lousy in any house ... long unshielded copper wires in a plastic tube.
Do you still hear it with all cables unplugged but for the speakers? Do you hear it with your headphones?
It could be a costly mistake if after installing a PC the problem isn’t gone. I'd try to get one with a money back guarantee. Unless of course you like to expand your setup with a PC anyhow.