If these 2 channel treasures were tested would it flatter the heretofore somewhat unimpressive results achieved by AVRs?
It really depends on where each is in the hierarchy of amplifiers/receivers. My HK 930 is twin channel/twin powered and probably measures pretty well versus a low to midrange AVR. Adjusted for inflation, the 930 was a $2600 amp. My SA-9500 II (also twin powered) likely measures even better. They didn't skimp in the 1970s amplifier arms race.