Apartments main fuse blows

you need to inspect all AC WIRING, to find the SHORT, thats causing the fuse to blow ! donot put another fuse in until you locate the shorted condition, ( bad connection, frayed wire, bare wire touching metal along this circuit, you might have a bad switch, your ac has two switches under hood, one @ high pressure side and one @ low pressure side. and your main control switch, check all wires & connections

try the distributor cap

Sounds like you're grounded out somewhere. I'd check your main power wire again, make sure there isn't any abrasions or cracks in the insulation. I had a Fosgate amp that would blow fuses everytime they were put in. turned out to be one of the screws to mount the amp to my floor board was grounding it out, pulled the screws and has worked fine ever since

It is still under warranty, return it.

More likely to be either shorted out bridge rectifier or MOSFET in the primary circuits of the power supply. You need to Ohm out those parts.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=Sylvania+LC320SS8+

My guess is the wiring around the headstock pivot are shorted out, and you will need to need to do a check with a meter. This manual should explain clearer....
http://www.carlsalter.com/download.asp?fileid=083117122117107105095071083088045082054048048095039057055045048048095083101114118105099101095077097110117097108046112100102

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replace your ignition modular

The reason your blowing fuses is the amp needs at the least a 150 amp fuse on the wire that runs to your bat. There are fuse blocks that you can put 4 40amp fuse and theres the high dollor ones that you can put all the way to 200amp. When you trun up your amp its drawing to much current for the little 40 amp fuse that you have and will blow it everytime. I recomend Running a 4 gage wire to bat and ground with same. Get you a 150 or above amp fuse from a car audio shop somewhere. anyway sounds like from what you decribed, theres nothing wrong with your amp just the wires and fuse are not big enouf to handle the current that your amp pulls.

have u tried using thicker wire from the battery to the amp u need to put a fuse in there thats a minumum 60

ok " sounds like you have a short, thats why it's blowing fuses