Designed for large spaces - Dance Hall etc. *Requires Bluetooth-Loudspeaker to manifest Zurz-klaw 0v frequency. Key F# @ 431Hz tuning in the 6th - 7th Schumann partials ~ UltraViolet (female/spiritual) audio range. Enjoy the big bass 'Om battle' redvberation.. Instrumentation: 1977 Yamaha FG325 acoustic
