thanks but i the speakers are fixed on the quiklok desk and i've never had a problem in my old house. i'm super careful with triangle thing - always have been - and always sit at the right distance. perhaps I should have been more specific. the real thing i'm asking about here is advice to stop bass cancellation from nodes. which is the best wall etc... and what problematic freq's exactly should i look out for in the position I choose...

Also is there a good tonal type test you can do - i'm sure i remeber reading about this before on here but can't find it.