The volume scale on the 1050 is unrelated to dB (or at least not in any sort of linear relationship). I would not worry about running the 1050 around 60 -- the max is at 80, but I often had it up around the 50's or very low 60's without any trouble. When I added a 750 to my old 1050, I found that I achieved the same output at a volume setting of probably 8 "notches" or so lower than I did without the amp (it's been a while, so my memory's a little hazy).

For reference (and some reassurance), there's a couple of threads on the subject:
Safe volume levels (this is a good one)
How high do you turn the volume?
What is too loud?

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