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The choice of weight that you use determines the response of the damping system. The lower frequency hand shock vibrations associated with the launch of the arrow tend to be reduced more with the heavier damper weights as it takes more energy to move them and often times the increase in displacement of the elastomer results in more low frequency energy absorption. Depending on the particular set-up these vibrations are generally in the frequency range between 100 and 200 hz and are driven by the set-up and the harness system of the bow. The higher frequency or ringing vibrations that can be initiated by the shot but may be due to individual components or accessories, tend to be absorbed better by Dampers equipped with the lighter aluminum weights simply because they respond better to and are more efficient at transferring energy at those frequencies. It is this difference in individuals and their bow set-ups that makes it necessary to offer the different variations in weights and dampers. [quote]I have some of the brass weights. Would they increase or decrease movement? Would felt vibration be less?[/quote] Their movement may or may not be slightly different than the aluminum weights but even if the movement is the same, you could be absorbing as much as three times as much energy and I would suspect that most people would feel less vibration.
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