"Stewart Pinkerton" wrote in message
...
It's the Royal Institute of British Architects (RIBA), and it does
indeed have such a list, Hepworth Acoustics being one of the principal
consulting firms. Don't expect this advice to come cheaply!

People expect to pay huge sums of money for loudspeakers,
and high end amplifiers. Surely it is not unreasonable to
expect to have to spend some money on the room?

Iain