Originally Posted by scanido
That would be primarily comparing the DACs between the two processors, and from what i read the MX150 have excellent DACs!
I had the MX-120. A the time of manufacture it had the best Burr Brown dacs money could buy. I loved the two channel audio produced from this processor!
I had my Pio BDP-09 hooked up for home theater analog out to the external inputs of the MX-120. I was very pleased with the sound. I also loved the loudness feature of the MX-120 processor.
That being said the MX-150 is a really outstanding piece of audio equipment. The MX-150 has a infinite number of possibilities for setting up your systems speakers, subs, crossovers etc. There really is no comparison in that regard to the MX-120.
As you know there is usually a workaround for different set-up issues.
My only (and it is small) gripe about the MX-150 is that it does not have a loudness feature. Some would not even consider this an issue, but I really liked what this feature did to the dynamics of my music. I am hoping that they will address this with a firmware upgrade in the future. I am not holding my breath though.
Once again I have a work-around (almost) for this. I have created a voicing set that has a frequency responce curve that is close to a Munson loudness curve. The only issue with this is it does not move in concert with the volume control.
After all that I can say with pleasure that I love my MX-150. I wish you all the best and hope this info helps you with your decision.