The M5s are definitely more accurate...higher fidelity...more refined than the M50s. I can hear a lot more detail and air. The soundstage is also wider. Instruments sound more real. Bass is tighter, midrange is clear and the highs are crystal. The M5s are real sweet in my main room compared to the M50.

I'm giving the M5s everything the Onk and ADA-1500 can dish out. I'm measuring 103 peak Volts on each side. That's over 1700 peak Watts. I could use more!

Recall I'm sitting 13 feet away in a 4200 cu. ft. room. The whole experience is crystal clear with an enormous 3D stage.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated