User Manual

1
Thank you for choosing Kopul.
Kopul’s HMX-2 Humbuster is an effective yet cost-
effective way to eliminate the 60 cycle buzz and noise
caused by ground loops. By inserting it into the line level
signal path (+ 4dBu or -10dBv), the HMX-2 eliminates
the ground loop while leaving your signal intact.
A humming or buzzing sound is often a telltale sign of a
ground loop caused by the formation of a connection
path between the grounds of two or more pieces of
equipment. The Humbuster offers a fast and direct
solution to this problem by breaking the ground loop
without degrading the signal.