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How do you prevent your Class D High Power Amp from Vibrating Off the Cabinet?

My Mesa WD 800 wants to vibrate all around and over the edge of my Ampeg SVT 4x10 cab even when its being used at a pretty moderate volume level. I can't believe I am the first bass player to confront this vexing problem and I am sure there is an obvious solution that I am missing which I will shortly learn. Thank you.
 
Some cabinets have more vibration of their top panels which contribute to this.

Kitchen drawer may, tool box mat, mouse pad, bar mat, piece of yoga mat are all good solutions when this is encountered.
 
My Mesa WD 800 wants to vibrate all around and over the edge of my Ampeg SVT 4x10 cab even when its being used at a pretty moderate volume level. I can't believe I am the first bass player to confront this vexing problem and I am sure there is an obvious solution that I am missing which I will shortly learn. Thank you.
Yep, it's been discussed here before. I also use an old mouse pad, that in addition helps a little bit with the cab vibrations affecting the head electronics. Velcro is an option as well.
 
AMAZON.. rubber bar mat. About 10 bucks. Rolls up into amp carry bag as well.
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