Dunno. This thread was about perceived differences in bass between Trifield and stereo, attributable to phase, and given that the width parameter alters phase (as I understand it) in some fashion, maybe it has something to do with the relative phase of the front three speakers when they're initially configured.

Drobo-->FW 800-->mac mini-->Ethernet
Transporter--> Wireworld Eclipse 6 coax-->Meridian G61
G61--> Nordost Red Dawn-->Primare 30.3
Primare-->Ocos--Vienna Acoustics Beethoven/Maestro