Question about PSB Alpha Sub Sonic 5 Subwoofer
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Posted on Jan 02, 2017
SOURCE: I have a PSB subwoofer
I have two in my shop right now. The power supply is to blame with these two. the manuf. has used some type of epoxy to hold down components before wave solder. This is in the high volt side of the switch mode power section right on top of the bias components . This epoxy breaks down and becomes resistive to the components below causing a direct short. There was a company years ago that had this problem with the same epoxy. A real stupid move then and a real stupid move now. If your power board is burned due to this problem your unit may not be able to be serviced. Solution is to change the supply. Of course the supply is 3/4 the cost of a new sub. Another real stupid move.
This opinion was provide by THE GREAT OZ.
Posted on Aug 12, 2011
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