The YBA YA201 is a very smooth amp. However, if you listen at lower levels, it might not be the amp for you. Unless it is at a moderate volume or better, its true sound doesn't come through. It kinda fades away at lower levels losing dynamics and contrast.
In comparison to the Audio Refinement, the YA 201 is more transparent, more refined and more powerful.
I have never owned the MF. I have heard it in demo's (for what that is worth) and thought it was a decent sounding amp. It doesn't have quite the warmth through the mids as the YBA but it is transparent and clean sounding. I would also add it doesn't have much grain.
With all this said, my choice of the 3 amps would be the YBA simply because it sounds higher priced than it is and can be had for great used prices. Other than the caveat of lower levels, it's a great little amp.
In comparison to the Audio Refinement, the YA 201 is more transparent, more refined and more powerful.
I have never owned the MF. I have heard it in demo's (for what that is worth) and thought it was a decent sounding amp. It doesn't have quite the warmth through the mids as the YBA but it is transparent and clean sounding. I would also add it doesn't have much grain.
With all this said, my choice of the 3 amps would be the YBA simply because it sounds higher priced than it is and can be had for great used prices. Other than the caveat of lower levels, it's a great little amp.