I've posted about this monster field coil that is in the Klipsch museum before but I thought I would share this document that Steve Schell posted at Audio Heritage.
A few pics. Not sure how many survive to date.
Check out my foot for a little perspective.
信／仰 - 有時後，「中頻很美⋯⋯時」，我真的不想再增加超高音頻段。 「人」最重要的是「幫助人」 ！ 牛教練／信仰
3 minutes ago