KLH Electrostats

This really going back to the hoary archives. I remember these speakers as polite sounding, a Massachusetts answer to the QUAD ESL. They look like Magneplanars. They often broke down, I guess they were hard to drive with the amps of the day -late 60s early 70s - I would proceeed with caution. People would run two pairs with big McIntosh amps to get higher sound pressure levels - they were grossly inefficient but had a "hard stop" level where they would start arcing...Apocryphal stories about grenading Phase Linear 700s...Hey, they might be cool as a conversation piece - try the Vintage section in Audio Asylum.

Unsound, those were 24" Hartley woofers. Hartley is still in business. There were anecdotes about peple installing these in the walls/floors of their music rooms, building brick enclosures, and so on. I'm not sure if you could still get service on KLH 9s these days, maybe from the Electrostatic Doc?