I didn't have both at the same time, so I couldn't A/B, and went by memory. I remember when listening with the Sony that there was clarity of sound in the mid and upper range, but wasn't surprised with the lack of bass since these were M22's. Listened to them for about a week this way. After hooking up the Pioneer and listening to the same source material, I was amazed with the amount of bass coming out of these speakers. I played them both at various volume levels, and I know that volume wasn't a factor. As far as both at low volume, I don't remember the difference, so I'm referring mostly to the higher volumes.
