BOGON. SPUTA, SPA 5-Watt Horn Loudspeakers DESCRIPTION Biogen Models SPA and SPUTA are compact, high intelligibility, reflex ohm-type loudspeakers. Their sturdy, weatherproof, all-metal housing permits installation either indoors or outdoors. Model SPA is an 8-ohm impedance hom speaker. The Model SPUTA has a bulletin, tap Impedance selector switch for matching the speaker power requirements to a 25V or 70V constant-voltage line.
