I read a few years back that surround speakers had to be the same
brand and the same size for true surround sound effect.
I see now that some surround sound speakers are of the same brand but
in mixed sizes such as fall standing speakers for the left front and
right front speakers with book self speakers as the rear speakers and
a different shaped center speakers.
I'd be interested in knowing if there are any real advantages in
having speakers of the same size (eg satellite speakers)?
If the fronr pair of speakers were of a different brand (and better
quality) than the rest of the speakers can this cause any problems in
a surround sound speaker set up?

Regards Brian