Please help subs not working

[lowfuel777]

I just bought a 2014 equus it has the Lexington surround sound and was trying to hook subs and a amp up in it. Here's what I have I got a box with 2 10s of audio pipe speakers and a 1000 watt amp mtx and a mvx 300watt 2 channel speaker cable to rca adjustable line output converter. This is what I have tried already I tied into the front door speaker wires from the plug that goes into the factory amp that didn't work so I tied into the sub woofer 1 and 2 to the plug that goes into the factory amp. Doesn't work either can some please tell me what to do

 

[1aespinoza]

I tied into the sub woofer 1 and 2

If there is an OEM subwoofer, wire the NVX input to the wires that go to that sub. Then use the NVX RCA outputs to the amp RCA input.