I am building a little stand for it, the audyssey mic, to sit on.
The sub setting of LFE+Mains simply means that the sub will be getting the frequencies below the main speaker crossover point as well as all material in a dedicated LFE channel when the mains are set to large. When the mains are set to small, the LFE + Mains setting is a moot point, as that is what happens any way, only then the small setting redirects everything below the crossover to the sub instead of duplicating it to the sub and letting everything through to the mains.
