Why is my bear sup mag so loud it is 55lbs shooting 700 plus gr arrow and it has bevear balls and cat whiskers. the brace is 8 amd a half in.

I'd try a new string.

Have you tried some bow hush on it.I put bow hush on every recurve I shoot,it can really quieten the string slap on the limb of the bow.Or maybe trying a different string material,whats on it now?Is this a newer model or an older one?

Its a new model with stock string. its not string slap its just the string buzzing.

Wrap some heavy wool yarn around the ends of the string were slap occurs.

I have one like it, and I know what you are talking about.

Check your beaver balls. I had one that was loose on the string and that was the cause of the buzzing. Try yarn puffs.

First...check the tiller on the bow.  Sounds to me like the limbs are not recovering together.
Check it at the fadeouts on both limbs and see what the difference is. If the tiller is reasonbly correct, then rework brace height to find correct spot.  Those Super Mags I believe like higher fistmeles due to the extreme deflex off the riser.

Is the stock string endless or flemish twist?  If it's endless, I'd get a good flemish twist string right quick; endless strings (esp. factory jobs) are loud as hell.

a long shot, but recently shot a bow that had the same sound. you don't by chance have a limb tip protector on it??  the bow I shot had a leather one, it sounded like a bumblebee. took it off and problem solved. if applicable, hope this helps.

                Froggy

Play with the brace height ...good luck mc

I put bowhush on mine, it did quiet down a lot

NO tip protector increased brace and it helped. will be getting a 8125 string.