TANNOY dual concentric driver. They pioneered the technology long ago, 1947 to be exact.
https://www.tannoy.com/innovation/Dual-Concentric-Driver-Technology.html
https://www.tannoy.com/innovation/Dual-Concentric-Driver-Technology.html
TANNOY dual concentric driver. They pioneered the technology long ago, 1947 to be exact. https://www.tannoy.com/innovation/Dual-Concentric-Driver-Technology.html |