Unless you’re a super loud band it’s unlikely to be a problem, I’ve used my RM500 with loads of different cabs, 4ohm, 8ohm, never been an issue, never needed more power (and we’re an Oi/punk band so not quiet). As above you’ll probably get 300 or so watts at 8ohms but with the Super Compact being a very good, efficient cab I’d doubt you’ll need the amp anywhere near full volume.