Formula for determining amplifier power needed? (1 Viewer)

[Citizen87645]

Does anyone know of a chart, calulator or have a formula that gives a general idea of how much power one needs given room size, speaker efficiency and desired SPL?

 

[Chu Gai]

Kinda, sorta...http://www.doctorproaudio.com/doctor...ladores_en.htm
You'll have to work it backwards, but it doesn't take much time and gives you a handle.

 

[GordonL]

http://www.myhometheater.homestead.c...alculator.html

Aim for 105db at the listening position.