which speakers for low watt power amp?

Sonus Fabers can be beautiful with voices. They are also well known for having synergy with many mid-powered tube amps. Depending on your desire for bass...or 'only' voices...as well as your budget...the Guarneris are amazing and SOTA in the mids. I know them well having spent many years enjoying them, and you can speak with DaveyF about them, as he owns them. Hope that is helpful. One man's opinion.

highly recommend Classicloudspeaker T3.4 they have a website you can look them up.Fantastic full range floor standing horn speakers efficiency 102db/watt-m .I just replaced a pair of Focal JM Lab Novas with these speakers.You can only buy them from the manufacturer it is a custom order and it takes a while to get,worth the wait.

102db would be TOO sensitive in my opinion; you would never use more than a few watts. 75 good watts will drive just about anything; perhaps not to maximum loudness in every case but to quite reasonable sound levels. Larryi has it about right.

Do you have a price range : about $3000 to $8000
size room : 18x20 but its a L shape room.
prefer floorstand speakers. If possible 12" or 15"
is tannoy glenair suitable?

The Glenairs could be a great option for you (either the 10"s or 15"s). The Turnberry's would also be one to consider.

Do you happen to have a Tannoy dealer local?

****Please note that I am a Tannoy dealer here in the US****

Taylor
www.goldprintaudio.com