It sounds like there is a problem with the amplifier. Try this: Unplug the speakers and the rca cables and the remote lead. The only thing that should be plugged into the amp is the power and ground. Try one more fuse, if it blows it immediately, you are on your way to the repair shop, or the get-me-a-new-amp shop. Sorry to be the bearer of bad news.
If you do have to get a new amp, have your speakers checked out. A lot of times if you have a bad speaker it can take the amplifier out with it.
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