$197.97
By Lubell Labs Inc.
Model # AC102
Lubell 200W Transformer Box for use with one LL916C or LL916H U/W speaker. Connect to 8 ohm output of UL listed commercial sound amplifier up to 200W @ 8 ohms. Converts amp output (40 Vrms) to speaker voltage (20 Vrms).
Connect AC102 inputs in parallel and in phase only. Connect one U/W speaker per box. Amplifier must have unbalanced output -- no bridged amplifiers! Connect amplifier to GFCI only!
Also useful for piggybacking an underwater speaker on to one or both channels of a 150 - 200 watt stereo PA system that has one 8 ohm air speaker connected to each channel.
The Lubell Labs 20 volt LL9816 and LL916 underwater speakers must be connected to a Lubell Labs transformer box, which in turn connects 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 GFCI protected AC outlet.
Lubell Labs die-cast transformer boxes provide electrical isolation of the underwater speaker from the amplifier for safety, impedance matching for proper amplifier operation, and a circuit that both limits current and flattens the frequency response during broadband operation (music, pink noise, etc.). 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 180dB/uPa/m @ 1kHz. A variety of transformer boxes are made to provide compatibilty with existing or custom sound systems. Splitting transformer boxes are offered to allow connection of an air and underwater speaker to an amplifier or sound system.
