Question about PSB Alpha Sub Sonic 5 Subwoofer

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I have a PSB Subsonic 6i Sub and the fuse keeps blowing when I turn on the power to the subwoofer, anybody know why?

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Posted on Jan 02, 2017

  • 5 Answers

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

SOURCE: PSB Subsonic 6i

Check the power cable.

Posted on May 24, 2008

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1 Answer

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I have a PSB subwoofer 6i and the fuse keeps blowing every time it is renewed.


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.

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1 Answer

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this is in response to the post below:

I just bot a basslink t and i wired it up and nothing it just keeps blowing the fues in the unit i got mine on ebay2.gif so i dont know if i can use the warranty dose anybody have an ida for me- britter623

I got a used basslink about a month ago and had the exact same prob kept blowing fuses...found out that the voice coil had blown on the infinity...so I had a brand new dvc polk 10 sittin in the closet, I swapped them out, put the polk in the place of the infinity sub, however, the magnet is much larger, hence, dual voice coil, it would rattle sooo much from the passive radiator against the magnet, also could not turn the gain up at all due to the rattle. I got the bright idea to build a "custom fiberglas enclosure for the polk and incorporate the infinity's parts(amp/control) I finished the box finally last night and hooked it up this morning, no power, no lights, no nothing! s@#%, F&@%! ANyone had a prob w/the amp not having the lights turn on, no power??? Hope that helps about your fuse blowing issue.










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