Put the speakers onto an outlet that's not running off the same breaker. Also get a new surge protector since after 8 years I seriously doubt it will do you any good at all (could even harm your hardware due to age).
Personally, ALL my computer hardware is feeding off of APC UPS'... I have a pair of 1000VA units that provide battery and/or surge protection to my critical hardware. I'll probably be picking up a third to use with my lower priced hardware soon (as well as my DSL modem) so that everything has battery power in case I get another blackout. Sucks to have a laptop running, router working, only to have the modem (on the other side of the room) without power.