Resonant Speakers

Avete mai visto o sentito uno speaker risonante ?

http://www.qsl.net/n5iw/spkr.html

Estremamente interessante e senz'altro da provare....

Just what the heck is a resonant speaker you ask? Well a resonant speaker operates under the same pricipal as a resonant antenna. It is a speaker tuned to resonate at a certain frequency.Read more.....