This takes us full circle back to the first few posts when we started discussing placement. The reason for the first few posts was based on Alan's historical input on the subject and some other bits from my memory where placement sometimes solved the issue, or at least ameliorated it. I'm not sure what the configuration of your original center - the Infinity (?) was, but I'll guess the VP150 is more robust. If you haven't tried the forward / back thing I suggested - give it a try. Might be a nice surprise.