A12 - 

The A12 features NEAR’s unique technologies to produce the highest
sound quality in the most durable and reliable loudspeakers available.
The A12 is a compact, high-powered speaker that projects well
in open spaces like theme parks, sports fields, and plazas.
Precise sound reproduction is achieved with two 6.5" mid/bass drivers
employing both MDT and patented MLS technologies for superior
sound and weather resistance. The high-frequency driver is a
1.9" horn-loaded diaphragm (1" exit). A built-in 128W transformer
makes the A12 compatible with 70V sound systems. The transformer
can be easily bypassed for use in low-impedance systems (16 ohms).
NEAR’s patented spiderless technology (MLS?) and advanced
materials deliver out-of-the-box performance year after year.
Speaker diaphragms are manufactured with materials that will not be
altered by constant exposure to UV rays or water, cold or heat, or
extremely high or low humidity.