I would also verify the distance with a tape measure. When I had a 350 with my Denon 2805 it did not get the distance right either. If I recall I had my 350 volume at about the 11-12 o'clock position and the receiver at 0dB, turned off the 350's crossover (all the way clockwise) and let the receiver control the crossover of 80hz.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
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