I try out a few variations measured on a decibel meter for a stick on sound system for a Phantom. If anyone has small speakers at home and can beat these I'd be interested, I'm sure there is the perfect small strong loud speaker, but I haven't found it yet.
http://www.youtube.com/watch?v=_cDEOQuO ... Vjd-PHQT0w
http://www.youtube.com/watch?v=_cDEOQuO ... Vjd-PHQT0w