blowing

I have a 2008 Ford F250 with factory touch screen navigation HU, and an 8" oem subwoofer. I disconnected the factory subwoofer, and wired an LOC into one of my rear speakers. I have blown a total of 5 subwoofers now (all appropriately sized RMS wattage for the amp, and I have the gain turned...

So, just last week i installed an aftermarket head unit (Sony MEX-BT3800U nothing amazing but it does for me) and 2 new vibe slick 5x9 front door speakers. Everything is working fine apart from one thing, the 3 amp fuse in the cars fuse box keeps blowing everytime i turn the volume up loud. In...