If you look at my original post I said -10dB's. I placed the sub at 9 o'clock as I understood the manual to read for initial setup. After using the pink noise test, I had to turn my receiver down to -10dB's for the sub to get the meter to read 75dB's. I just figured since the 500 had a bigger amp compared to my 350, that is why it had to be so much lower. It just suprised me as Alan has always said to put the receiver on 0dB's and adjust the volume on the sub to reach your desired settings.

I'm no expert, believe me...

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