Looks like a 10B to me -- ask the Polk forum guys.
Silver coil (EDIT) SL2000 tweeter (not Polk's finest moment)
no fuse = (I think) Raychem "polyswitch" inside (ditto).
lol I read bad comment about the sl1000 sl2000 sl2500 my 10a have the sl1000 and I like the sound just fine . These ones in question are for a friend and @ $160 I think that's pretty good with stands . Thanks for the replies