Are two speakers louder than one?

[Littlewyan]

A very good video that explains all. Thought I'd share.

https://www.youtube.com/watch?v=mhIQSxKFgoQ

[pdf64]

See some info from Celestion that seems to provide some evidence to back up the theory http://www.thegearpage.net/board/index. ... b.1138789/
The mutual coupling seems to cover the audio bandwidth fairly evenly, rather becoming peaky-troughy above ~500Hz.