V. WIRING THE LL916 U/W SPEAKER, AC205B XFMR BOX, BOSCH PLENA AMPLIFIER
IMPORTANT!:
Mount amplifier and audio equipment in a vented cabinet or equipment rack,
located in a humidity free area. Connect AC powered audio equipment to audio-grade power
strip and GFCI outlet as required under National Electric Code. Test GFCI before each use.
Always vacate the water at the first sign of inclement weather and lightning storms. Avoid
microphone feedback and/or excessive sound levels, which can be harmful to speakers and
human hearing.
Caution:
Do not exceed 25 volts rms to the input of the AC205B
box
.
Exceeding this voltage will burn out the underwater speaker, which will not
be covered under the warranty.
We highly recommend the Bosch Plena amplifiers
listed in our literature -- meets all low voltage safety requirements (grounded power
cord, UL commercial sound listing), has Class AB output stage for reactive speaker
stability, AND provides speaker protection circuit to help prevent burnout.
Connection of speaker, amplifier, house system by certified audio contractor only.
1.
For 1 to 3 speaker installations, use Bosch PLE-1P120-US amplifier and connect all
AC205B transformers in parallel to the 25V speaker tap. (If using PLE-1ME120-US,
use 4 ohm tap.) For 4 to 6 speaker installations, use Bosch PLE-1P240-US amplifier
and connect all AC205B transformers in parallel to the 25V speaker tap. Amplifier
meets all NEC & UL safety requirements including grounded power cord (for
connection to GFCI outlet), UL Commercial Sound Listing (UL813), Class-2 wiring
rating, and 25V and COMMON speaker connections with speaker protection circuit.
2.
Using a short 18 gauge speaker cable, connect “25V” screw terminal on Lubell
AC205B box to “25V” speaker terminal on amplifier, then connect “COM” screw
terminal on Lubell AC205B box to “0” (common) speaker terminal on amplifier. Use
one AC205B transformer box for each speaker installed, and connect (daisy-chain)
multiple boxes in parallel/phase only. Make sure plastic terminal blocks are inserted
fully and set screws tightened to hold firmly into place.
3.
Connect black wire from LL916 underwater speaker to “B” screw terminal on Lubell
AC205B box, then connect white wire from LL916 underwater speaker to “W” screw
terminal on Lubell AC205B box. Green ground wire from LL916 underwater speaker
may be connected to junction box / common pool ground per paragraph IV section 7
on previous page. Follow ALL local, national, and international electrical code
regulations.
4.
With power off, connect amplifier and any interconnected equipment to an audio
grade surge protected power strip; connect outlet strip to GFCI outlet only; Test
GFCI before each use.
5.
Connect audio source (CD player, tuner, network device) to line input on Bosch
Plena amplifier or mixer amplifier per Bosch Plena manual.
6.
Observing front panel power level meter on the Bosch Plena amplifier, adjust
volume of system (using outboard Crestron control and/or rear panel volume control
on Bosch Plena) so loudest section of music brings power level meter up to -3dB
maximum.
9484-25V-50’ * APPLICATION & INSTALLATION GUIDE
Page 2
2016 Lubell Labs Inc. All information subject to change without notice