Tomlinson Holman made some notable design contributions to consumer audio (APT audio etc). That said i recall some nonsense when Peavey tried to get amps THX approved, for movie installs. Some of their restrictions were not strictly audio performance related, but favored a small handful of manufacturers (like where volume controls were located, direction of air flow, etc). Theater owners were already buying and using Peavey amps, but they wanted to be able to say they were THX approved. I don't recall how this was ever resolved, if it was.
JR