I actually set the sub to "0" on my reciever and calibrated the sub manually to 75 db. This make it easy to know exactly where 75db is, if I want a little less bass, bump it down to -5, if I want to run it a bit more, up to +5. But I always know where 75db is with the rest of my system. Makes it easier to play with sub settings and being able to put it back to normal.

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