Eiron wrote:
ruffrecords wrote:


I have never heard it expressed in SPL but a long time ago I read that
the peak output from an orchestra is about 70 watts of acoustic power.
You should be able to work it out from that.


Domestic speakers are about 1% efficient.
That might help.

What you really need to know is the watts/sq metre. Assuming the
inverse square law applies then 70W acoustic heard at 10 metres is
equivalent to 70/(10*10) = 0.7W acoustic at 1metre. If your speakers
are 1% efficient then you need to feed them 70W to achieve this.

This math seems to simple. Is it right?

Ian