Perhaps you mean the MK-I vs the MK-II. The ARC web site makes no mention of a MK-III. I did have my unit updated to MK-II in the spring. The update includes fitting a removable IEC power cord, addition of a fan, and adding two small circuit cards containing additional power supply capacitance. The update yielded better dynamics and more of a sense of "sonic ease". At some time, I would like to explore updating the power cord.
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- 15 posts total
- 15 posts total