As Bill said, Boulton was one of the whole house stereo originators, and his installations were "cost no object" projects. Actually, a huge cost was the object, for the moneyed wealth of the East coast, as they liked to brag about how much their Boulton system cost.
I heard two of these systems while I was in the military, and they were both dated, long in the tooth, and quite underperforming by the mid 1980s. Unless you own an architecturally significant sprawling house that demanded one of these systems in the 1960s/70s, and have both the deep wallet and significant hearing loss needed to buy, repair and install the system without hearing how limited it is today, don't get it.
This system was at a Conneticutt estate sale a couple years ago, IIRC.