First of all thanks to the many people who've posted good advice over the years, I'm now a happy owner of a Yamaha 750 amp, MS 906 fronts, 905 centre and 903 rears When I started connecting it all up the 906s sounded gorgeous in stereo before plugging everything else in. Now it's all connected they don't sound as strong in the mid of bass ranges (even in pure direct mode). Is this something to do with loading the amp more with the other speakers or have I just adjusted to the speakers? Has anyone else noticed this? I biwired the fronts last night using the A+B posts on the amp and this seemed to improve the sound a little - but may just have fixed dodgy connections!