A north-east facing plot is best for all type of constructions, whether a house or a business establishment. You can put it on the html element and control it through JavaScript. This is complemented by the built-in pad that provides 15dB attenuation, and bass roll-off filter for taming the excess lows. KVK locates just a single copy worldwide, that in the British Library. I'm sure someone else here can narrow it down further.