I-JBL

UJames Bullough Lansing kanye nomlingani wakhe webhizinisi uKen Decker baqala inkampani ngo-1927 eLos Angeles bekhiqiza 6 and 8 inches (150 and 200 mm) abashayeli bezipikha bama console omsakazo namasethi omsakazo. Le nkampani yaqanjwa ngokuthi iLansing Manufacturing Company kusukela mhla lulunye kuNdasa 1927.

Ngo-1933 inhloko yomnyango we-Metro-Goldwyn-Mayer (MGM) UDouglas Shearer owayenganelisekile ngezikhulisa-zwi ze-I-Western Electric ne-RCA wanquma ukuthuthukisa eyakhe. UJohn Hilliard, uRobert Stephens, noJohn F. Blackburn babeyingxenye yeqembu elasungula i-Shearer Horn, ne-Lansing Manufacturing ekhiqiza umshayeli wokucindezela we-285 nomshayeli we-bass we-15XS. I-Shearer Horn yanikeza intuthuko efiselekayo futhi i-Western Electric ne-RCA yathola izinkontileka zokwakha ama-unit angu-75. I-Western Electric yazibiza ngokuthi yi-Diaphonics futhi i RCA yazisebenzisa kuma-RCA Photophones ayo. I-Lansing Manufacturing yayiwukuphela kwenkampani eyayithengisa njenge-Shearer Horns. Ngo nyaka wama1936 i-Shearer Horn yathola umklomelo we-Academy Scientific and Technical Award evela ku-I-Academy of Motion Picture Arts and Sciences.