Powerd speakers problem

hello all, i have a pair of behringer b212d 550w speakers, I haven’t used them in a while and i decided to sell them, but when i checked to make sure they function properly one of the speakers fuse wasn’t there. The other speaker did have a fuse in it but the sound is very distorted, when i played music on it, I couldn’t hear the vocals half the time and when i could hear them they were distorted and at a low volume. I then switched the fuses and the same result with the other speaker. im not sure if this is a problem that a damaged fuse can cause, or maybe something inside the speakers are broken?

Im trying to find a fuse i can buy online but nothing i found looks like the fuse that’s in the one speaker.

Any and all help is greatly appreciated.

If you're in the UK try Maplin.

Link: http://www.maplin.co.uk/search?text=fuses&x=0&y=0