Lubell 9484-25V-50 Installation Manual
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I. DESCRIPTION
The Lubell 9484 is a professional 37.5 watt in-wall underwater speaker kit intended for contractor installation
at 4’ to 6’ depth (6' ideal) during new concrete or gunite pool constructions utilizing standard or saltwater
chlorination systems. DO NOT INSTALL in vinyl liner pools or concrete pools having vinyl liner due to poor
acoustics.
Per page 4 pictorial, the 9484 includes: A9000 stainless steel wet niche with 3/4” bronze conduit hub, A9002
stainless steel grille, LL916 underwater speaker, 21007 PVC/stainless steel speaker support, AC205B 25V audio
transformer/resistor box). The LL916 speaker is fitted with choice of 50', 100', 150', or 200' 3-conductor cable that
runs through conduit to above ground J-box. (Extra cable can be coiled inside the niche for future on-deck
inspections.)
II. LOCATING THE SPEAKERS
For lap swimming applications, use one 9484 kit for each 20 feet (6.1 meters) of pool length. See last paragraph of
online brochure http://www.lubell.com/9484.html for locating diagrams of typical pools. Use two 9484 kits for 20' x 40'
pools and locate 10' from each end catty-corner in long axis walls at 5'-6’ depth. Use three units for 20' x 60' pool and
locate one unit 10' from each end at 5'-6’ depth in common 60' wall; Locate third unit in center of opposite wall at 5'-6’
depth. For 25 yard Olympic pool, locate two units in each 25 yard wall (4 total) 18.75' from each end at 6' depth. For
50 meter Olympic pool, locate four units in each 50m wall (8 total) at 6' depth at following distance from ends: 6.25m,
18.75m, 31.25m, 43.75m. Installation at 5’-6’ depth is recommended, but units in shallow end may be reduced to 4’
depth with some loss of low frequency response and reduced sound level. Install in flat section of wall only, as grille
must mount flush. For large municipal pools, the speakers should be located around the periphery of the pool for
proper sound distribution. Since stereo imaging is not possible in water, use one speaker per 20’ x 20’ zone.
III. INSTALLING THE A9000/2 NICHE/GRILLE
(LICENSED POOL CONTRACTOR/ELECTRICIAN ONLY)
CAUTION: EXTERNAL BONDING LUG ON ALL SPEAKER NICHES, LUMINARY NICHES, AND POOL
FIXTURES MUST BE BONDED TO AN EQUIPOTENTIAL BONDING GRID WITH A SOLID COPPER
CONDUCTOR NOT SMALLER THAN 8 AWG PER NATIONAL ELECTRIC CODE SECTION 680. 1) Rough in
each A9000 wet-niche at 6’ depth in positions recommended above in COVERAGE section, bonding external lug to
equipotential bonding grid per NEC 680. Run conduit to nearby above water J-box; Run conduit from J-box to air
conditioned equipment room. CAUTION: IF UTILIZED, GROUNDING LUG INSIDE UNDERWATER SPEAKER
NICHE MUST BE GROUNDED TO THE SAME COMMON GROUND AS ALL LIGHT NICHES, PUMPS, AND
FIXTURES USING GREEN 8 AWG COPPER WIRE PER NEC SECTION 680. If local code requires sealed
conduit, then seal conduit inside niche with approved sealant. 2) IMPORTANT: Observe diagram inside niche to
insure that the very foremost edge of niche is finished flush with the final tiled or painted surface of the pool wall --
area must be flat for grille to seat. 3) IMPORTANT: Concrete structure around niche flange must be undercut and
filled with sealing plaster to insure a proper watertight seal.
IV. INSTALLING THE LL916 U/W SPEAKER WITH 21007 SUPPORT
1) If utilized, insure that grounding lug inside speaker niche is grounded to common pool ground via green 8 AWG
copper wire, and that termination is potted with UL potting compound to prevent deterioration. 2) Insert the V-shaped
21007 speaker support upright into the A9000 niche with long stand-off's facing into niche. 3) Draw LL916
underwater speaker cable through conduit leaving sufficient cable coiled inside niche for future on-deck inspections.
4) If code calls for sealed conduit, then apply approved sealant around speaker cable and #8 grounding wire where it
enters conduit hub, and let dry. 5) Gently tilt the LL916 underwater speaker (cable side first) into the niche and place
on 21007 stand. 6) Install A9002 grille, being careful not to overtighten screws. 7) Terminate the green U/W speaker
ground wire along with the green niche ground wire (8 AWG copper) to the same common pool ground as all pool
light niches and pumps. 8) Splice the speaker's black and white wires to two-conductor speaker wire (Class 2 rated):
16 gauge for <100' run; 14 gauge for 100'-200' run; Use direct burial cable for non-conduit installations.
9484-25V-50’ * APPLICATION & INSTALLATION GUIDE
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2014 Lubell Labs Inc. All information subject to change without notice