I was calibrating my new Ascends last night (with a ratshack analog meter using the receivers test tones) and something struck me as odd...

I have 340's across the front and the left and rights are the same volume but I had to bring the center speaker down 4db's. Why? It's the same speaker.

Any thoughts? Is this common?

I have a Yamaha RX-V2500 receiver and when you put a DVD in a "dialog lift" message is displayed...that shouldn't come into play when using the receivers test tones should it?

SBF1