Vintage Polk Monitor 10Bs - fuse question

nms

My parents have a pair of 10Bs with fuses for the tweeters in the rear panel where the wires connect.

Mine, which are approximately the same vintage, have no fuse back there. I'm wondering if they don't have a tweeter fuse, or if they just moved it.

Thanks!

george daniel

My guess is that the polyswitch replaced the fuse in later production.