Ok, I have the original Avia and spl meter from radio shack. I have it at slow and C setting and 75db. So basically I set each speaker to 0db on my prepro and turn the master volume up till I reach 75db. Then I set the db for each speaker so it all reads 75db without messing with master volume. But I'm confused on one thing....the sub. The sub is set on 0db on the prepro also and I'm not sure if I'm supposed to adjust the db or just turn the volume on the sub itself to 75db and keep the prepro 0db on sub? I'm guessing to mess with volume on sub and then use the pre/pro for diff sources such as DTS, cd, Dolby Digital, etc? Am I right?
