Hey guys so I want to upgrade my system with a while keeping my factory radio. I will upgrade my door speakers and a 4 channel anm along with a mono block with some subs. So my friend tells me that in order to do that I need to buy a sound processer that fixed the factory sound signal so it flats it out like an after market radio would. So I'm looking at the jl fix 86 that does that but then of I really want to fine tune my sound I then have to buy what they call the twk 88. That's like $400 each. Is there something out there that does both in 1 device and that is obviously good.