I have a JBL 2200.1 which puts out 2450 watts into 4 ohms, and has a max current draw of 190 amps, what size fuse should i use on it, JBL recommends a 150 amp fuse, but i don't know if it would get its optimum power out of that, and i need all the watts i can get from it to power my Cerwin Vega stroker pro which is 2500 watts rms
Use a 150amp fuse, the worst that can happen is the fuse will blow. Then, call/email JBL and find out what the biggest fuse you can use is. If you have a DMM, see if it puts out max power on the 150amp. If not(like a few hundred watts not) then call JBL as well.