settings and tweaking help needed

[bigchevyboy 10+ year member]

ok I need some help with what should the 0 180 phase switch on my amp be set to as well as the other nob with the #'s on it. its a RFt3001db and on my deck help is needed setting subwoofer. it also has that 0 180 setting and what I guess would be the sub frequency. I can hook it up but I can't tune it worth a ****. sorry if I sound stupid for I am a novice stereo tech. thank you

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