Originally Posted by
rusty jefferson
Excellent idea, however group A/B or A/B/X testing isn't a great idea in audio. One, or perhaps 2 people sitting one in front of the other is best. The differences in these tests can be subtle and often are only caught if sitting in the listening position. Image height/width/depth or perhaps sound being 'stuck' on the speakers as opposed to good transparency where no sound can be heard coming from the speakers are often not audible if sitting off axis, or low level detail/spatial cues, etc.
I haven't done a moderated test since Covid but have one coming up this winter also. It is getting tougher these days to voltage match with so much equipment having stepped attenuation. The voltage does have to be exactly the same or listeners will pick up the difference in level and not necessarily differences in equipment.