In general, yes you are correct. Rather than get into all the science behind this, you will also need to factor in how big is the room that you will be setting up your system in, how loud do you like to listen to your music, and what type of music do you like to listen to. Also, you want an amp with more reserve power than a speaker's max. If you drive your amp to near clipping/ clipping, you will fry your speakers as the power is "dirty" power.
I have Opera Plateas that I use with a Prima Luna Prologue 5 (tube based, 36 wpc). Even though the room is pretty big by NYC apartment standards (15 X 23 X 9), I listen at low levels, so the amp choice works out ok. If I were listening to orchestral music at loud levels and wanted to hear all the details, I would most likely need a more powerful amp.
FWIW, the Opera Callas are rated from 50 to 100 watts. So, you have many choices available to you in an amp.
Regards,
Rich
I have Opera Plateas that I use with a Prima Luna Prologue 5 (tube based, 36 wpc). Even though the room is pretty big by NYC apartment standards (15 X 23 X 9), I listen at low levels, so the amp choice works out ok. If I were listening to orchestral music at loud levels and wanted to hear all the details, I would most likely need a more powerful amp.
FWIW, the Opera Callas are rated from 50 to 100 watts. So, you have many choices available to you in an amp.
Regards,
Rich