For concrete 25 yard high school & 50 meter collegiate pools

The Lubell Labs Underwater Loudspeaker has remained the most popular underwater speaker in the world since 1968, as it's patented design is significantly louder and clearer than competing designs and products. (Click HERE for US Navy TVR plot.) This unique design (U.S. Patent #3,391,385) utilizes a dual-piston PVC overmolded aluminum enclosure as the sound transducer, offering true pistonic operation and low Q in a compact corrosion-free package. Coupled with a powerful 8-cylinder piezoelectric engine (with efficiencies approaching 60%), no other brand compares!

The Lubell 9484 underwater speaker has become a standard feature and effective training aid in 25 yard high school and 50 meter Collegiate pools worldwide. Swimming coaches utilize the Lubell underwater loudspeaker to play upbeat music and metronome beats to their swimmers, improving their endurance while eliminating the tedium of seemingly endless laps. Swim coaches also appreciate the ability to effectively and clearly communicate stroke and kick guidance to their swimmers via wireless microphone. (For existing pools, swim coaches can utilize Lubell Labs' portable swimming pool sound systems including the CAWSS-Stageman for synchronized swimming, and the CAWSS-APEX for competitive swimming.) Lubell 9484 underwater loudspeakers have also become a standard feature in luxury hotel and resort pools worldwide for paging guests, swimming activities, and emergency egress announcements in the event of inclement weather.

Regarding installation, the included Pentair 78210400 (Lubell SKU A9000) stainless steel wet-niche must be installed (see guide) and encased (see diagram) in void-free concrete at 5 to 6 foot optimum depth (3'6" minimum) below the waterline by a licensed pool contractor during new concrete pool construction. (Vinyl, fiberglass, and steel walled pools have extremely poor acoustics, and the installation of any underwater speaker is strongly discouraged.) Concrete must be cut back around the niche (diagram) to allow for a compacted plaster seal (hydraulic cement), and bonding is made to the Equipotential Bonding Grid per NEC 680.26 (B) and (C) (see drawing & article/pdf) along with all metal parts of pool structure. For home pools, one unit is recommended for installation in each 20 foot x 20 foot (6.1 m x 6.1 m) section of the pool (which can be supplemented with an AQP545 subwoofer). For deep collegiate pools, one 9484 is recommended for each 37.5 foot x 37.5 foot (11.43 m x 11.43 m) section of the pool (subwoofer not recommended). See "installation location diagrams" link below for recommended placement locations. Proper placement, depth, and full void-free encasement of niche in concrete is critical for proper sound -- please refer to diagrams below, and call us with any questions regarding this critical element of the design stage.