I did the upgrade a few days ago, after about 6 month of using the MPS-5 player. Hearing the player the last couple of days after the upgrade I can say for sure this upgrade is a must. I remember one reviewer who wrought that the player sounded to him a bit "confused" and "uncontrolled" in the bass region. I also heard that . Indeed, the sound was always impressive with bass foundation but the musical picture was, to my ears, sometimes unclear, a bit unfocused in a way that I couldn`t put my finger exactly on it, but made me at times bothered and a bit detached.
I can not say what was the change they did (I have no electrical understanding but I`ve noticed some resistors were changed to capacitors in one part of the power supply section). The company did not disclose why they did the change and how it will influence the sound. But the change is to my ears a real wonder. Everything came into place and bass definition was lifted to SOTA performance, no more undefined or uncontrolled bass, no more blurred picture, and when you get the parts right and in place you get a complete musical picture. Involvement factor is at best. I can now fully "trust" this player`s musical message and for my taste and ears it has more organic and realistic musical presentation than anything else I know including the EMM XSD1 . If you`ve appreciated the MPS-5 player before, I think now you will understand better why. That at least happened to me.
I can not say what was the change they did (I have no electrical understanding but I`ve noticed some resistors were changed to capacitors in one part of the power supply section). The company did not disclose why they did the change and how it will influence the sound. But the change is to my ears a real wonder. Everything came into place and bass definition was lifted to SOTA performance, no more undefined or uncontrolled bass, no more blurred picture, and when you get the parts right and in place you get a complete musical picture. Involvement factor is at best. I can now fully "trust" this player`s musical message and for my taste and ears it has more organic and realistic musical presentation than anything else I know including the EMM XSD1 . If you`ve appreciated the MPS-5 player before, I think now you will understand better why. That at least happened to me.