The Lubell Labs
LL916C-IE is an efficient full-range pistonic piezoelectric
underwater acoustic transducer developed and manufactured by
Lubell Labs of Columbus, Ohio USA. This model is intended
for military and government sales only due to higher voltage
handling & output levels, and is fitted with a Teledyne
Marine IERD2F-BC-3 underwater pluggable bulkhead connector,
and a high performance protective cage.
Mating cable assemblies (IE2M-7/16-XX) are available thru
Teledyne marine, and other Marsh Marine vendors.
The
LL916C-IE has a maximum voltage handling of 25 Vrms or
3.5A (whichever comes first) and produces sound levels up
to 182dB/uPa/m @ 1 kHz. The LL916C-IE may be permanently
mounted at depths from 6 feet to 60 feet in fresh or salt
water using the cage's 4-bolt flange. The cage also
provides added protection to the sensitive internal
electronics against breakage from rough seas.
The LL916C-IE underwater acoustic
transducer is typically used with the Lubell model AC205B
transformer box. One nice arrangement for harbor defense
or invasive species repelling is to connect four LL916C-IE
speakers (via four custom length IE2M-7/16-XX cable
assemblies & four AC205B transformer boxes) to a
single Samson Servo 300 amplifier. (Two per channel with
amplifier set in STEREO
mode.) Up to four amplifier's with 16 connected LL916C-IE
speakers can be connected to standard 120V 20A GFCI
protected electrical service, resulting in a highly
efficient "wall of sound" covering the length of a
football field.
