Into my Stereomour, which is hooked up to Klipsch Heresy IIIs, the sound with the Moreplay is slightly fuller. Without it the Stereomour plays plenty loud enough into the Heresy IIIs, but I would describe it as leaner. Not sure yet which I prefer. Given that the Stereomour has volume control and input selector I probably wouldn't have thought of adding the Moreplay in front of it. I've always felt the Heresy IIIs were a little bass shy in my system so I'm really liking the sound with the Moreplay...
No noticeable microphonics, the selector switch is quiet and doesn't pop when changing. Plus, it's nice to have a balance control.
This is a really, really nice preamp.
Phil