Quote Originally Posted by cradeldorf View Post
he runs a wire from the speaker frame to the negative speaker connection <snip> just wondering why it would make a change in the sound?
I've even seen it on some older commercial speakers. Not sure why.
Also I've been under the impression that my 604's are basically 515's with horn drivers mounted to them
I think it's the other way around. I believe the 515 came as result of the 604.