sub not working

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    Subwoofer not working with stereo upgrade. Assistance is appreciated!

    Hello all, I've run into a sort of predicament when trying to upgrade my aftermarket car stereo. I have a 2015 Chevy Sonic hatchback with an Alpine MRV-M500 mono block amp sporting a 10'' Kicker Comp VR sub-woofer in a ported box via 4g wiring. My current head unit is a Pioneer FH-X720BT. I...
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    Amp works, sub won't (fusion sub w/ attached amp)

    So, I just installed a kenwood deck and my old fusion 10" sub w/ attached "1000" watt amp in my sisters car... Deck works fine, and the amp is turning on. But the sub isn't getting a signal. The RCA cables are hooked up right ( they are kinda old and have been sitting in my closet for about 2...