Hi,i just installed the deck you are refuring to.Although i did a complete scap,including removing the factory amp.I do not see any reason you can not use your sub woofers. If you get the wiring harness and follow the directions on the package (except you have to reverse the yellow and red wires ) it should be plug and play.I on the other hand would highly suggest you do the same as i did. It was easy. I got the wiring diagram for the system,removed the amp under the passenger footwell,cut the outboard plug right off, attached spade crimp on connectors,picked up 2 terminal strips,and attached and put spades on speaker wires coming off my amp(S).If you want a rocker this is the only way to go!I am still running the factory speakers,got a jl 13 tw5-3 sub,a jl 500v2 slash series to power it along with 2 old punch 200 dsm amps i had since the mid 90,s 1 to power my fronts and 1 to power my rear subs( if you can call them subs.)Any ways you wont wont be disapointed with the deck kd avx 77 i assume. It is loaded Good luck