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Depending on where the object stacked you can remove the cover of the speaker and unscrew the screws of the speaker or unscrew the perimetric screws of the amplifier section (the metal surface at the back side of the subwoofer). Afterwords you have to locate the object and remove it. Keep in mind that both the woofer and the amplifier section, have some centimeters cable free so don't force them in order not to get apart.
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Thanks and regards Please kindly rate this solution Stelios direct fixya link: http://www.fixya.com/users/technical114
check out that the output is not shorted on the terminal strip or near the connectioon to the sub woofer speaker driver.......if not then there is some other problem and you need to take it to a trained technician .......as you yourself can't rectify the problem.....
Without Knowing the Output Chip or transistor Numbers, I don't know but Most 100 Watt anps use 60 to 70 Volt Centertap Sacondarys. Also if You Take the Cover off The Transformer you will find a Thermal Fuse in the Primary. I have bypassed the Thermal Fuse and went with a external fuse, Go for it.
I would reccomend that you change out the drivers themselves that have a deepened low-end frequency resposnse. But, changing the crossover just might tweak the sound to your tastes better, and cheaper. Here is a link to a website that I often order from whenever I need something Audio/Video related. They have a reliable support staff, and usually products arrive a day or so sooner even with basic shipping. Prices are good too. Good luck,
Your speaker cover should either twist and gently pull off or may just need gentle prying with a small screwdriver. Before attempting is your speaker grill foam or metal. Some like my pioneers, you must gently remove the actual grill and not the entire facia itself to access the speaker removal. If you need to remove the grill, i recommend using a tiny screwdriver and gently work around the edges evenly. Steve
there is an underlying cause for the fuse to blow. if something shorts out you would rather a 40 cent peice goes then the unit causing a fire. disassembly is require... look for obvious burnt parts first.