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I finally decided on the speakers for my reference set 1. In this video I explain why I made this choice. It’s not a review though, since I did not compare it with other speakers in this class under my own - controlled - conditions. It’s almost like when you buy speakers. Although the Audio Physic Scorpio’s - even the initial versions I own - are fantastic speakers in their class, the other components in my setup 1a were rather upgraded over time and needed loudspeakers of an even higher class. Over time I have gathered a number of criteria for loudspeakers. The most important is a fairly usable impedance curve. Almost all speaker manufacturers specify their products as being 8 Ω as where they seldom are. As such that isn’t a problem but if the impedance gets below 4 Ω in combination with a large phase angle, demands on the amp become really troublesome. See my video “What about loudspeaker impedance?” for more on this. And although the Ayre Acoustic amp can handle a lot, I rather use a speaker that doesn’t live on the edge. And there are more than enough brands and types to choose from. Another factor is efficiency, specified as a number of dB’s per watt at one meter or a number of dB’s per 2.83 volts at one meter. These two are more or less interchangeable. The average speakers delivers 89 dB SPL at one meter when driven with 1 watt or 2.83 volts, written as 89 dB/1w/1m or 89 dB/2.83V/1m. I explained this in detail in my video “How many watts do I need”. In short the lower the the number, the more amp power you need. For every 3 dB lower you need 10 times the power but keep in mind that for normal playing levels only a few watts are needed. Room friendliness might not be a factor for people with their own listening room annex man cave - like I have for my setups 1 and 2 - but if you have your stereo in the living - like my setups 1a and b - aesthetics play a role. Size, shape and finish play a factor here. I like the sound of the Vivid Giya range of speakers but both shape and finish would be completely misplaced in our living room. The same goes, for instance, for PMC MB2S XBD studio monitors. But there also is another form of ‘room friendly’. That has to do with acoustics. There are many technical properties in a loudspeaker that determine placement in a room. For instance the dispersion of a loudspeaker dictates a certain distance from the side walls as where a vent at the rear of a speaker might dictate a certain distance from the back wall. The dispersion also is a factor when toeing in loudspeakers. Dipole and bipole speakers might need an even larger distance to the back wall and can live with a smaller distance to side walls. I...