Lubell Labs 9484 Underwater Loudspeaker

Underwater sound for private, public, commercial, high school, college, and Olympic CONCRETE swimming pools! 9484 underwater speaker
Back in 1965, Alan H. Lubell of Lubell Labs invented the first underwater loudspeaker! This unique design (U.S. Patent #3,391,385) utilizes a dual-piston PVC overmolded AlMg enclosure as the sound transducer, offering true pistonic operation and low Q in a compact corrosion-proof package. Coupled with a powerful 8-cylinder piezoelectric stack (with efficiencies approaching 60%), Lubell's patented underwater speaker is significantly louder, clearer, and more dependable than any other competing product! Lubell Labs is the only underwater loudspeaker company publishing actual certified performance data on their products (CLICK for US Navy response plot).

The Lubell Labs 9484 underwater speaker is an effective swim training aid, and has become a standard feature in high school and college Olympic swimming pools worldwide. Leading swim coaches utilize the Lubell underwater loudspeaker to
clearly and effectively communicate stroke and kick guidance to their swimmers via wireless microphone, as well as to play upbeat music and/or metronome beats to the swim team during warm ups. For existing pools, Lubell Labs offers the CAWSS-Stageman for synchronized swimming practice, and the CAWSS-APEX for competitive swimming and synchronized swimming competition.

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. Many guests who have heard Lubell underwater speakers at the resorts, have integrated the Lubell into their own home pools via their preferred contractor.

Regarding installation of the Lubell Labs 9484, 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 6 foot depth (3 foot minimum shallow end)
below the waterline by a licensed pool contractor during construction of the new concrete swimming pool. (NOTE: Vinyl, fiberglass, and steel walled pools unfortunately have poor acoustics, and the installation of underwater speakers 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). For home pools, one Lubell 9484 is recommended for installation in each 20 foot x 20 foot (6.1 m x 6.1 m) section of the pool (diagram) which can be supplimented with an AQP545 subwoofer. For 3 meter deep collegiate pools, one Lubell 9484 is recommended for each 41 foot x 41 foot (12.5 m x 12.5 m) section of the pool (diagram); do not use subwoofer!). 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.


Home pool; Olympic pool
INSTALLATION DEPTH: 6 foot (1.83 m) recommended; 3 foot (915 mm) minimum for shallow-end only.
OPERATING TERMPERATURE: 0 deg C - 41 deg C (32 deg F - 105 deg F)
FREQUENCY RESPONSE: 100 Hz - 23 kHz (450 Hz - 20 kHz +/-10 dB per US Navy tests).
MAXIMUM SPL: 179 dB/uPa/m

RECOMMENDED AMPLIFIER (in stock): Russound A2100 world-voltage ETL Listed 1/2RU amplifier powers two Lubell Labs 9484 speakers. (Eight speakers? Then link four amplifiers!)

Amplifier must not exceed 100 watts, must be UL or ETL listed and labeled for Class 2 wiring, and must connect to GFCI outlet in dry air conditioned equipment room only.

A9000 Pentair 78210400 stainless steel wet-niche (11.5 inch flange, 10 inch body diameter x 7.5 inch depth, 3/4 inch NPT conduit hub). Note: Order AT-3425-BR 3/4 inch to M25 hub adapter for international orders
A9022 316 stainless steel perforated dome grille, 11.125 inch diameter x 5/8 inch height
21007 speaker support, PVC clad stainless steel
AC205B isolation/matching transformer box, 6.1 inch x 3.75 inch x 2.375 inch. One reguired per each LL916 speaker - Install in dry indoor area only.
LL916-XXX Lubell underwater speaker, 9.2 inch diameter x 5.8 inch axial length. Choice of attached cable length: 50 ft (15.24m), 100 ft (30.48m), 150 ft (45.72m), or 200 ft (60.96m). Use shortest choice possible to reach above water level junction box, then splice and home run to dry equipment room.

AQP545 Clark Subwoofer Kit for home pool use only.. use one with each Lubell 9484. Choice of 50 ft, 100 ft, 150 ft, or 200 ft tails.
A2100 Amp (PIC) - Each linkable world-voltage amplifier powers pair of 9484's (impedance switch "8 ohm" position), and second A2100 amplifier powers pair of AQP545 subwoofers (impedance switch "4 ohm" position)
AT-3425-BR Metric Hub Adapter: Adapts A9000 wet niche's 3/4 inch NPT conduit hub to fit overseas M25 conduit threads

DOCUMENTATION: Warranty, Niche rough-in guide / pictorial, Installation guide, depth and sealing diagram, bonding diagram, printable brochure, safety letter, RoHS/REACH Compliance Declaration, CE mark, FAQ

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Lubell Labs Inc
712 S Yearling Road
Columbus, Ohio 43213 USA
Tel: +(614) 725-2701