My new m80s.. 1st using sansui g5700 75w. I hooked them up put on a cd for dinner music, I couldn't turn the volume past 2. The out put was so much more than my KLH 17.
Listened all week with the Sansui, nice smooth pronounced mids and highs. Good bass.
mostly low to modrate level listening, using a large variety of cds.
I did discover some of them to be poorly recorded, never noticed before.

Last night had my son carry them to the basement, my hernia repair prevented me.
Hooked them up to the adcom 555 amp placed them right next to my HPM 100s so all I had to do to judge was move over 1 cushion on the sofa.

We played the same song on each speaker one at a time. My son and I both agreed on the same differences. The M80s put the Hpms to shame as far as mids and highs, but the Hpms had more bass.
We then played the same songs on my old phillips turntable , wow what a difference, much "smoother" full range sound.
We both liked the m80s with the turntable the best.
I had him carry the Hpms upstairs. We played with the postioning of the m80s with the others out of the way. Spread them further apart moved closer to the rear wall. faced almost straight forward
We cranked it up a little and...There's the bass! Nothing missing here!