No criticism of the vintage Scott amp except to say it wil almost certainly equalise any two or more way speaker connected to it as th eamp output impedance tracks the speaker impedance curve. many folks live with that and don't even noticeright again, an active speaker would seem to be ideal for the application if it weren't for the idea that I also want to have an option to use my grandfathers Scott 296 tube amp in that room. Right now I'm using a VTV Hypex amp but that has over 300 wpc of power and will be used to driver future front channels in the movie room. Not sure what I'll use when I'm not in the mood to warm up a tube amp, maybe a used class A amp like a Krell or BAT since those have been cropping up for sale a lot lately with all the people moving to digital.
Old Krells were never fully Class A despite the heat I gather. The output at spec was usually biased to Class A, but typically, these amps gave far more continuously, as for example, both the KSA 50 generations were 90 - 100WPC amps as AB models but with half the power biased fully on (the 50S had two lower levels of bias to save heat depending on use). I gether thhe bigger amps weren't so different and of course whay you were really paying for back then was the doubling of power from 8 to 4 to 2 ohms, which few domestic amps came anywhere near to initially in the 80's I believe.