Maybe there's a super simple answer to this one. But why with alot of amps being stable into 2 ohms these days are they still using 8 ohm speakers? Why not make them 4 ohm so that we can pull more power out of the amp. I do realize that many receivers might hate that, but who's plugging a nice pair of diy speakers into a receiver anyway. It seems like everyone is using pro amps, or at least a lot of guys are. Anyhow, just curious.