I recently upgraded my ma-1 to version 2. If you can afford it, do it. It improves on the ma-1 version 1 in all respects. When i 1st listened to the upgrade, the things that caught my attention was that there was a great increase in detail , bass output and definition. Next i heard an increase air and space around the vocals and instruments. The attack of percussion instrument seem faster and more sudden. The overall sound just seem richer and more vibrant. The upgrade to version 2 made a great improvement over version 1 and for the money was worth more than the price asked.