John, one more question in regards to my statements above using the SPL meter. Do you use 70 or the 80 on the selection dial? It seems if I use 70, and calibrate all my speakers to 75, when I switch it to 80, it reads around 78 or so dB's. Likewise, if I use 80 on the dial, then go down 5dB's to 75dB, it shows about 73dB when the selection dial is on 70.

I'm just trying to make sure I'm calibrating to 75dB.

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