I am replacing the factory stereo with an aftermarket stereo and adding an small amplifier as well. The question I have is this. The factory stereo is on a 7.5 amp in the fuse box, the aftermarket stereo needs a 10 amp and the amplifier requires a 15 amp. My question is this. Can I replace the amp in the fuse box with a 15 amp fuse or will I need more?

Thank you for your help
Greg