conor_thompson 10+ year member
Member
So I havn't been on the FI website in a while and I just checked it out because I was thinking of getting a BTL but I noticed they don't make them anymore? Is the SP4 a upgraded version? I wanna do a custom build where I take out the back of my backseats and put a 18" there. Really just want the most db's I can get. Will the SP4 take more watts?