I guess it varies with the characteristics of the house, wall materials etc. I've surely experienced dropouts with lossless, and none with compressed. Sonos recommends using compressed if you have more than four zones.

Last edited by GuyNextDoor; 2010-08-20 22:08.
Current M-related equipment: DSP7000 (2), G91A FM, Sonos ZP90/ZP80 Zone Players, F80 (kitchen,yellow).