Newly minted member, first post. I came across a pair of very heavy (50 lb?)Professional Series speakers at a thrift and I can't recall the model number. The unit had 2- 8" drivers and a dome tweeter made of aluminum (crushed of course, this is a thrift). The front face of the box (not the grille, this was dark brown or black), was an ugly blue, kind of on the light side. The box was wood veneer, very thick 3/4" maybe. I thought maybe it was L413 or L431 or something like that. Any ideas?