I just bought Tannoy (Turnberry GR) as my first foray into higher efficiency (93db) speakers. I’m never going back to anything less than 91db efficient. But also impedance never goes below 5 ohms with these Tannoys.
My previous speakers were 88db Salk Songtowers. Easy to drive...even with a 30 watt amplifier. BUT...it has impedance dip below 4ohms. This led to very subtle suppression of bass at particular moments. I’m hearing everything thing I heard before but just a little bit more in some frequencies and a LOT more in other frequencies. I just never knew what I wasn’t hearing.
One word: effortless.