Were they the Jimmy Hughes inspired piezo horns that I made in the late 70's early 80's. The Batpure super tweeters I use sit in those original horns though needing no L pad.Been there, done that in the early 80s.
ESL 57s, home made bass bins with 10inch ATC drivers and Piezo tweeters mounted on top. Sounded pretty good.
No they were cheap as chips, intended for car audio I believe. Used as super tweeters they opened up the sound stage. ProAc used them for years.Were they the Jimmy Hughes inspired piezo horns that I made in the late 70's early 80's. The Batpure super tweeters I use sit in those original horns though needing no L pad.