"Eeysore"
I know of no 'PA' amps currently using mosfets.
** Huh ????
All those hundreds of thousands of MOSFET audio power amps made since the
mid 1980s have not justs disappeared you know - power amps made by H-H &
Harrison Electronics plus C-Audio in the UK , Perreaux and ZPE of NZ,
Australian Monitor and ARX (still in full production) and Jands here in
Aussie - plus many other less well known brands.
The majority are STILL in use, maybe looking just a bit the worse for wear.
Even in the UK - Chevin Research ( based in Yorkshire) A-series amps are
all lateral mosfet designs.
http://www.chevin-research.com/products_a_series.php
...... Phil