Well, if you want to consider "grandaddys", you might look for a pair of Sonabs designed by Stig Carlsson. He first developed omni radiation speakers in the 1950s in an attempt to replicate the sound produced in the concert hall.
They have not been imported for a couple of decades but different models show up used from time to time.
Here is a link to their history -
http://www.carlssonplanet.com/history.php?PHPSESSID=10571310094a7e07d0cbf02dd8bb9f14
They have not been imported for a couple of decades but different models show up used from time to time.
Here is a link to their history -
http://www.carlssonplanet.com/history.php?PHPSESSID=10571310094a7e07d0cbf02dd8bb9f14