Dampener Questions Answered

Dampeners are a constant source of questions for us here in the store.
Where to put them?
How many to use?
Are there rules?
What do they do?
We'll start with the last one. What they do is limit the vibration of the strings. They do not reduce frame vibration or prevent or cure tennis elbow. By reducing the string vibration, they do add comfort at impact and quiet the "pinging" sound that many people dislike.
You only need one to do the job. Adding more will not add benefits, and, there are rules that dictate where they are placed. Dampeners must be below the bottom cross string. This makes them much less likely to affect a shot by them contacting the ball.
The best place for them is between the middle two main strings and secured up against the bottom cross string. If you have a problem with them coming out, consider using a longer dampener that is woven in and out the mains, hooking in at the two ends. This makes them less likely to come out.
And one last question, "should I use a dampener?"
That one we can not answer. Ultimately, it is a feel thing. Try your racket with and without. Whichever feels better, there is your answer.