I have a jvc kd r310 cd player and im running a 4 channel amp and 2 subs. How do i hook up another 4 channel amp to run my door speakers and rear speakers

Thanks a lot! So all i have to do is connect all the line outputs to the line inputs? my amp for the subs is a lanzar vibe422 2000 watt 4 channel with 2 line inputs and 2 line outputs. The other amp is a sony xplod 4/3 channel with 2 line inputs, one for the rear speakers and one for the front speakers. Thanks a lot! So all i have to do is connect all the line outputs to the line inputs? my amp for the subs is a lanzar vibe422 2000 watt 4 channel with 2 line inputs and 2 line outputs. The other amp is a sony xplod 4/3 channel with 2 line inputs, one for the rear speakers and one for the front speakers.

Yup. So lets strat from the beginning. So your head unit has a pair of RCA outputs, those outputs will feed into the first amp(LANZAR) for the subs (LINE IN). Now that LANZAR amp for the sub also have a RCA outputs, take another pair of cables to run it from the output of the LANZAR amp to the INPUTS for the SONY amp. Now that sony amp can be used for the 4 speakers. Yup. So lets strat from the beginning. So your head unit has a pair of RCA outputs, those outputs will feed into the first amp(LANZAR) for the subs (LINE IN). Now that LANZAR amp for the sub also have a RCA outputs, take another pair of cables to run it from the output of the LANZAR amp to the INPUTS for the SONY amp. Now that sony amp can be used for the 4 speakers.