Gallo Reference 3 SA Owners

Well sure, but the point is that you do have to advance the two level controls from the "Min" (zero) position to get anything out of the amp at all. Your contention that these controls work as tone controls is true insofar only as the SA operates as a LOW BASS control as you advance the level settings. I mean, it's just a subwoofer amp and that's its job.

Dopogue, I just don't think Bostonbean gets it. He's confusing flat with zero. In this case flat is not zero. There is a position on the level control where the bass is neither attenuated or accentuated. If you can find that position then you will have a flat response below 40 hz. If you go above that position you may have too much bass, below that position, not enough bass. The reason why Gallo doesn't mark that position on the level control is because it is system and room dependent. That is why you have do the best you can and do it by ear. That is what I asked in my OP. Where are the owners of the Gallo amp setting the level?

I run mine at about 1 o'clock. My amp is a DK Design VS I Reference Mk.2