bit restricted by things in the room for much movement.

I'm wondering if the silly dip at 100Hz might be something to do with boundary interference from the sound off the wall behind the speakers.

I can probably move the speakers about 6" in any direction without having to do 6 hours work dismantling things. Will see if this affects it. Can't imagine its' going to have much effect on the ragged top end of my graph but be interesting to see the bottom end.

On the other hand I'm hearing the 100hz change dramatically around the room so that sounds like room modes to me. maybe i've just got the speakers at a position that's particuarly good for exciting my room...

I hate room acoustics, shame i can't just shift all the kit outside...