Peavey Portable Speaker LL916 User Manual

INSTRUCTION BOOK  
FOR LUBELL  
LL916 UNDERWATER SPEAKER  
LUBELL LABS INC.  
21 NORTH STANWOOD ROAD  
COLUMBUS, OHIO 43209 U.S.A.  
(614) 235-6740  
 
SPECIFICATIONS: Lubell LL916 U/W Speaker  
200Hz - 20kHz  
20-volts rms  
Omni-directional 200Hz-2kHz  
Slight scalloping 2kHz-20kHz  
180db/uPa/m @ 1kHz  
5' minimum - 50' maximum  
Frequency Response:  
Maximum Speaker Cable Voltage:  
Directivity:  
Output Level:  
Speaker Operating Depth:  
Dimensions:  
Speaker:  
Cage:  
9.0" diameter x 5.50" axial length  
10.750"H x 10.750"W x 7.750"D  
14 lbs.  
17 lbs.  
Net Weight:  
Shipping Weight:  
SPECIFICATIONS: AC205B/C  
50Hz - 20kHz  
Frequency Response:  
Impedance (nominal):  
Input voltage:  
Output Voltage:  
Connectors:  
16 ohms (with LL916 connected)  
25 Vrms line (or 75 watts @ 8 ohms)  
20 Vrms  
AC205B: Screw terminal in/out  
AC205C: Screw terminal in, 4182-3SG-300 out  
5.0"L x 3.5"W x 2.25"H  
2.25 lbs.  
Dimensions:  
Net Weight:  
Shipping Weight:  
3.0 lbs.  
 
INSTALLATION & OPERATION  
The Lubell Labs model LL916 underwater speaker is a precision instrument that deserves careful  
handling. The following simple rules will serve as a guide to achieving maximum life:  
1. CAUTION! Carefully inspect the underwater speaker cable before each use, and do not  
use if damaged. Do not attempt to open and self-repair the LL916 as this will void the  
warranty. If speaker cable needs replacement, please return the unit to us for low cost  
replacement. Please contact your installing dealer for questions regarding service, or  
call Lubell customer service at (614) 235-6740 between 8:30-17:00est.  
2. CAUTION! Always vacate the water during electrical storms or inclement weather.  
3. CAUTION! Be sure that your amplifier is connected to a GFCI protected AC outlet  
only, and is installed indoors on a shelf or in a vented equipment rack in an area with  
low humidity. If the amplifier will be used portably, it must be kept on a stationary  
wooden equipment table indoors with a minimum distance of 10' away from the water.  
4. A UL813 listed commercial sound amplifier must be selected that provides a 25V constant  
voltage speaker output. Allow 37.5 watts power consumption for each LL916/AC205  
connected to the 25V line. We recommend Peavey UMA752 mixer/amp or IPA752 power  
amp (75 watts) to power one or two LL916/AC205’s; Peavey UMA1502 mixer/amp or  
IPA1502 power amp (150 watts) for three or four LL916/AC205’s; Peavey IPA300T for five  
to eight LL916/AC205’s.  
5. Connect AC205B/C transformer box(es) in parallel and in phase to the “25V” speaker output  
terminals on amp. AC205B box(es) must be located indoors, and may be located by the  
amplifier, or located closer to the OP1 jack plate(s) providing lower loss for long cable runs.  
Do not use L-pad or autoformer between the underwater speaker(s) and the amplifier. If  
remote volume control is needed, use the “remote volume” pot connection on the Peavey  
UMA series mixer, or insert a Crestron type volume controller between the source device  
(receiver, pre-amp, CD/tape) and the Peavey UMA amplifier’s stereo tape/aux input.  
6. The OP1 connector plate fastens to a single-gang all-weather J-box, which should be  
mounted at least 8” above the deck to a cabana wall or wooden post by the pool. For single  
speaker installations, center the J-box on the length of the pool where the U/W speaker will  
be placed; Run 1/2” conduit from this box back to the house. For two speaker installations,  
mount each J-box on a post ¼ pool length from each end of the pool and run 1/2” conduit  
between J-boxes, and 1/2” conduit from one box back to house. Install 14 gauge 2 conductor  
speaker wire in the conduit between each transformer box and OP1 jack plate. Connect one  
end (of each pair) to “LL916” terminals (B=black, W=white) on AC205B transformer box  
and other end to OP1 connector plate’s black and white wires. Connect the green ground  
wire from each OP1 connector to a good ground using #8 copper.  
7. Take good care of the U/W speaker cable, as it is not covered under the guarantee. Do not  
use the speaker cable to lift, lower, or support the underwater speaker. Instead attach a sturdy  
1/4" nylon cord to the speaker cage for this purpose. Lower the speaker to a 6’ (1.83 meter)  
 
depth, or place on the bottom of the pool. Experiment with position/rotation of speaker until  
best pool coverage is obtained.  
8. Remove the underwater speaker(s) from the water after each use, and store in dry cabinet.  
Do not leave the speakers in the water, as automatic pool cleaner will damage the cable.  
Avoid scraping the speaker, as damage to the coating will result in eventual failure. If speaker  
is stored for prolonged periods, a white film (plasticizer) may appear on the speaker or cage.  
This is normal -- film may be washed off using a sponge and warm soapy water.  
SYSTEM APPLICATION  
These remarkable sets are a decade ahead of their time. Many engineers and scientists working  
in the field of underwater acoustics are still unaware of the feasibility of compressing the size of  
a low-frequency transducer without reducing it' s efficiency; or of the feasibility of driving a  
piezoelectric transducer over broad-band frequencies using common transistor amplifier  
circuitry. A partial list of current uses follows:  
Swimming & Scuba Instruction  
Gunlap and false start signal, competitive swimming  
Recall of scuba divers to excursion boat or habitat  
Paging of scuba divers & swimmers at popular resorts  
NASA training facilities  
Military and scientific research  
Interrogation of suspicious divers by law enforcement  
Communication during filming of movies with underwater scenes  
Coordinating underwater work parties  
Coordinating underwater explorations  
Coordinating underwater treasure hunts  
Training of killer whales, dolphins, and other species  
Repelling/attracting Beluga whales, sharks, dolphins, manatees, and other species, away from  
atomic test sites, hydroelectric facilities, fishing nets, oil/chemical spills, intercoastal waterways,  
and other potentially dangerous situations.  
 
OBTAINING SERVICE  
No user serviceable parts are contained in the LL916 underwater speaker, AC205 transformer  
box, or the Peavey UMA or IPA series amplifiers.  
Should your speaker or transformer box require service, please contact your installing dealer or  
call Lubell Labs at (614) 235-6740 between 8:30-17:00est for return instructions. If the Peavey  
amplifier requires service, please contact Peavey AA-repairs at (601) 483-5376 for a return  
authorization number and return instructions.  
Please include a packing list (itemize contents), description of problem, your return address, and  
phone numbers to reach you at. Most repairs can be performed within 2 weeks. You will be  
contacted with an estimate prior to repair unless specified otherwise.  
LIMITED WARRANTY  
Lubell Labs warrants the LL916 and the AC205 to be free from defects in material and workmanship,  
under normal use and service, for a period of five years from the date of delivery to the first  
user-purchaser.  
During this warranty period, the obligation of Lubell Labs is limited to repairing or replacing, as Lubell  
Labs may elect, any part or parts of such product which after examination by Lubell Labs discloses to be  
defective in material and/or workmanship.  
Lubell Labs will provide warranty for any unit which is delivered, transported prepaid, to the Lubell Labs  
factory for examination and such examination reveals a defect in material and/or workmanship.  
This warranty does not cover travel expenses, the cost of specialized equipment for gaining access to the  
product, or labor charges for removal and re-installation of the product. Not covered under the warranty:  
speaker burn-out, cord or connector damage, coating damage and subsequent speaker corrosion.  
This warranty does not extend to any unit which has been subjected to abuse, misuse, improper  
installation, or which has been inadequately maintained; nor to units which have problems relating to  
service or modification at any facility other than the Lubell Labs Factory.  
THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT  
LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A  
PARTICULAR PURPOSE. IN NO EVENT SHALL LUBELL LABS BE LIABLE FOR ANY LOSS OF  
PROFITS OR ANY INDIRECT OR CONSEQUENTIAL DAMAGES ARISING OUT OF ANY SUCH  
DEFECT IN MATERIAL OR WORKMANSHIP.  
 

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