About: http://webisa.webdatacommons.org/439127086

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Is there such a thing as a filter that simply cuts frequency off at a certain point so this horn could be hooked up to almost any LF speaker combination? ala a simple filter that prevents any audio below 800Hz from reaching
http://www.w3.org/ns/prov#wasQuotedFrom	audioheritage.org