I used a Stinger LOC2 in my Tornado to feed into 2 subs and 2 splits. I then ditched the LOC and went an Eclipse HU and ran the speakers in Active mode. The difference in quality was amazing. If you can strech it, get an aftermarket HU. Believe me I'm just as pedantic when it comes to cutting up and drilling holes into my car, but the 'tissue holder' can be removed and deck fitted so no holes can be seen to be drilled if done correctly. GL mate