Peavey manual LL916 Underwater Speaker & AC205 Transformer BOX

LL916 UNDERWATER SPEAKER & AC205 TRANSFORMER BOX

The Lubell Labs Model LL916 underwater speaker with AC205 inline audio isolation transformer box was designed to meet the need for a quality, high output underwater speaker selling at a reasonable price. Its patented broadband high-output design easily fills large pools with pleasing, wide range sound. It is as effective for synchronized swimming as it is for communicating with divers and dolphins in the open ocean.

The LL916 integrates features from LL Model I and LL Model II prototypes. The piston closure of the Model I provides ruggedness at a reasonable cost, while the improved acoustic

design of the Model II enhances the quality and quantity of available sound.

The ribbed casting, flanged piston design of the speaker makes possible the attainment of low-Q in a small size underwater radiator, while the integral compliance element presents an optimum load to the driving element.

The shell of the LL916 serves the dual function of piston radiator and water tight enclosure for driving element and electronics. Electrical variations are changed to force variations using the piezoelectric effect. The force variations move the two pistons in unison against the reaction of radiation resistance and mass. Because of the high impedance of aqueous media, small excursions of the pistons produce acoustic waves of considerable strength.

The speaker is clad in a rugged 30 mil blue PVC coating with redundant seals, and is EPDM shock mounted in a PVC coated stainless steel cage. A 25' heavy duty cord is hardwired to the speaker and is either terminated with a molded Conxall Multi-Con-X 3182-3PG-524 connector (LL916C3) or supplied with bare end for contractor termination (LL916C). Coding: White (+); Black (-); Green (ground).

For portable applications, the LL916C3 is provided with the model AC205C audio isolation transformer box, which has mating Multi-Con-X 4182-3SG-300 output connector and screw terminal input. Order stock number LL916C-T1.

For semi-portable contractor installation, the LL916C3 U/W speaker is provided with the model AC205B audio transformer box (screw terminal I/O) and the OP1 all-weather jack plate

(4182-3SG-300 on pigtail). Order stock number LL916C-T3. The OP1 plate is installed on a single-gang J-box on a wall or post by the pool, and conduit/cable is run from this J-box to the AC205B and amp in the indoor control room. Amplifier selection and connection is discussed in the installation and operation section of this guide.