Noise Dampening
I have a Vixen. 
I have the factory string. I put cat whiskers on the string and wound up with then 7 inches from the rail. I put the large Sims limb-savers on the sides of the rail just below the string, centered on the string. I have the large limb-savers on the belly of the limbs as far out as they will go. I have the small(recurve) limb savers on the back of the limbs butted up against the limb hold down bar. I have a Simms hold down spring silencer on the hold down spring. I am not absolutely sure all this really makes the bow quieter, but, it has greatly changed the frequency of the noise and there is simply no felt viberation.
I am not sure how much speed all of this cost me, but, I am getting 265fps with a 438 grain bolt and 260 with a 455 grain bolt,
and I am well pleased and satisfied with that performance.
I have the factory string. I put cat whiskers on the string and wound up with then 7 inches from the rail. I put the large Sims limb-savers on the sides of the rail just below the string, centered on the string. I have the large limb-savers on the belly of the limbs as far out as they will go. I have the small(recurve) limb savers on the back of the limbs butted up against the limb hold down bar. I have a Simms hold down spring silencer on the hold down spring. I am not absolutely sure all this really makes the bow quieter, but, it has greatly changed the frequency of the noise and there is simply no felt viberation.I am not sure how much speed all of this cost me, but, I am getting 265fps with a 438 grain bolt and 260 with a 455 grain bolt,
and I am well pleased and satisfied with that performance.I never was as good as I used to be.