i have 2 12 mtx tr75s and a 1000w alpine amp and a 4 gauge boss wiring kit i blew the 60a fuse that came with it within 2 days and blew the 80a today after just buying it should i go with the 100a or 125a agu fuse
Find the short before you trash your gear and start a fire.
the fuse is there to protect the amp.if you keep raising the amperage of the fuse you could risk damaging the amp. If you are blowing fuses too easy one of the first things I would check is make sure that all connections are tight and secure, meaning not touching any metal or any other wires this goes for the amp wires and the speaker wires.also the amp is designed to operate at a certain ohm level, ex. (1 ohm, 2 ohm, 4 ohm or 8 ohm) 1 and 2 ohms are usually used for spl contest, 4 ohms is the average with cheaper amps and subs. Since you said you have 2 12's you may have it wired up in a 2 ohm configuration while the amp can only take 4 ohms. The way you wire the speakers vary based on how many voice coils each speaker has and the ohms of those voice coilsI'd say figure out what ohms the subs are and then figure out what ohm your amp is stable at and search multiple speaker configurations. example, lets say the subs are 4 ohms and and the amp is stable at 4 ohms, your search would be wiring configuration for 2 sub woofers on a 4 ohm amp once you get that figured out put the fuse that was rated fir the amp back in and try again, if problem persist i would start taking to the place you bought it.
The reason we have fuses is to protect the other devices in the circuit and to prevent fires. It's easier and cheaper to replace a fuse than an amplifier of some other component. If you get putting in larger fuses, eventually you'll get to the point where the component that is overloading the circuit will fail instead of the fuse.