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Installing The Prosound429 Thumper Under A Drum Throne

Flip the drum throne over
Put masking tape where the mounting bracket will go
Set the Thumper and Unimount Bracket on the masking tape
Make sure the Thumper does not touch the stand
Mark around the Unimount Bracket
Place just the Unimount Bracket on the masking tape
Mark four screw holes for the Unimount Bracket
Drill the screw holes (0.14 in / 3.5 mm)
Remove the masking tape
Install the Unimount Bracket
Insert the threaded stud (8-9 full revolutions)
Place a jam nut on the stud and tighten with a 9/16 in. wrench
Place a second jam nut on the stud but do not tighten
Gently turn the Thumper onto the stud (5 full revolutions)
Use two 9/16” wrenches to tighten the brass against the jam nut
DO NOT turn the thumper by hand to tighten it!!!
If you are mounting two Thumpers to your drum throne, repeat this process for the other side.
Clark Synthesis recommends mounting on either side of the drum throne, not the front or back.