Matching transformer for Lubell Labs Underwater Spkr

Matching transformer for the Chiayo StageMan Portable PA systems.

The Lubell Labs 20 volt LL916C or LL916H underwater speakers must be connected to one of the Lubell Labs transformer boxes listed below, which in turn connect to a Lubell Labs approved UL listed amplifier of the correct power and impedance rating. The transformer box and amplifier must be kept in a dry air conditioned area, and AC operated amplifiers must be connected to a earth leakage protected AC outlet.

Lubell Labs AC Series transformer boxes provide: 1) Electrical transformer isolation of the underwater speaker from the amplifier for safety; 2) Impedance matching for proper amplifier operation; 3) A tuned RLC circuit that both limits current and flattens the frequency response during broadband operation (music, pink noise, etc.), and; 4) Volume matching of air and underwater zones (select models). When connected to amplifier of designated wattage and impedance, the output of the transformer boxes will not exceed 20 Vrms @ 3.0A at full drive, and each underwater speaker will produce maximum sound pressure level of 179 dB/uPa/m @ 1kHz. A variety of transformer boxes are made to provide compatibility with existing or custom sound systems. Splitting transformer boxes are offered to allow connection of both air and underwater speaker to an amplifier or sound system.