Of course, you can but don't forget to check if your device is good enough. You can read more information about rca cable and subwoofer cable to learn more about your devices. There is much basic information which also suits newbies! So, good luck
For the first time it was realy hard for me to figure things out and connect all the wires but once you find out how to do that properly you won't struggle anymore.
There are two types of sub. The first is the powered type. This has a socket that connects via a cable to your amp socket - marked sub out. Some amps have the abillty to switch this socket on or off and comtrol the output. The sub itself is mains powered.
The other sub is none powered. This requires the speaker cables to be connected to it, the bass being extracted from them, before passing the signal on to the speakers
SOURCE: locked up sub-woofer cone won't move?
In theory your idea would work, however you risk damaging your amp by reversing polarity and the positive and negative wires from your head unit are low voltage so they wont provide enough current in reverse or normal polarity to free the cone of your sub. but here is something that you can try that is similar in concept.
Take a positive lead from your head unit and wire it to the negative of your sub. Now ground the positive terminal of your sub to the vehicles chassy using a wire. This creates a 12v-14v reversed polarity current that should be strong enough to (POP) the cone so to speak. hope this helps
Testimonial: "thnxx should work ttyl "
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