He did NOT JUST CALL THEM ALUMINUM SPEAKERS!!!!!
I noticed that too, pretty funny. But I think he actually said "aluminum tweeters" while pointing to the woofers. In fact, the woofer cones are aluminum, but the tweeters are titanium, so he just jumbled the two together.
I've never seen the show before, but was struck by how nervous and jittery all the cast appeared. Was this their first night? I gotta say though, I kinda like the feel it had. Like a bunch of gadget freaks and geeks just took over a TV studio and started a show.