Speakers are very subjective. I personally like speakers that are efficient, 93dB/watt@1m or greater. Concentric or coaxial mounted drivers best, 2nd is vertically aligned drivers as close together as possible. Only one driver for the tweeter frequencies, 8kHz. or higher.
Downside of sensitivity?
I'm new to world of audio, and still puzzling out a number of things. One question in particular that I have concerns speaker senstivity. It seems as though higher sensitivity is a positive, i.e. it allows one to use lower-power amplifiers, sound is more relaxed, generally more flexible with equipment. Yet there seem to be a large number of quality speakers with lowish sensitivity. Given that speaker design seems to be an exercise in compromise (short of the cost-is-no-object level), what qualities does one give up with higher-sensitivity (say, > 91db)? Conversely, what qualities does the speaker designer gain with a less sensitive design(86-87 db)? I've quickly learned that there are no absolutes when it comes to audio equipment, but any thoughts as to the trade-offs in general? Tks.