 | This article has not yet been rated on Wikipedia's content assessment scale. |
Onkyo
editThe article currently only talks about Philips, however the Onkyo article mentions this technology in the 60's. John Vandenberg 02:17, 2 July 2007 (UTC)
Panasonic
editPanasonic produced a motional feedback amp/speaker system in the late 1960s. The manual for the Model MF-800 and companion EASB-8M2 speakers may be found here:
http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=12&t=707 — Preceding unsigned comment added by 76.186.71.167 (talk) 21:06, 21 December 2014 (UTC)