I have shot, setup, & tuned a couple of AlphaMax bows. They are a very nice Bow indeed. 2 of the ones I worked on, I ended up changing out the stock suppressor for a Custom MeanV Hoyt OEM replacement at the owners request. It made a very noticeable difference.
I have sold several of the Hoyt rpl. models and Feedback is very positive.
I suppose you still have the shox silencer in the string? You might also try positioning it in different locations to see if that will help.
Dan