hi,i just got my system few weeks ago consists marantz sr7500, ms906, ms905c, ms902 & ms309. i have some question and hope anyone out there can give me some advise. a)what should i set the size for the speakers? when watching movie,by setting the speakers to small will have gd bass response. but when for music,setting the speakers to large will gives more clearity. for my sr7500 , the bass and treble is set at 0dB , left center and right at 0dB , surround L & R at +2dB and subwoffer at +3dB, crossover freq at 100MHz. for my subwoffer volume and crossover freq is set at middle. anything wrong with these setting? currently i have to switch between large and small each time from movie to music. b)for my 309 subwoffer, is there any difference if i set the notch filter to off? Because currently i don't have a SPL meter and i dont know how to make use of the notch filter. c)i have hook my ps2 to sr7500 using optical cable. but the amp auto detect digital in only able to detect stereo for all the prologic game. how come? i have to manually switch to prologic for gaming and then switch back to auto for music and movie.... Thanks...!