Tuning the Wicked Stage1 system to sound right

RonRizz

Leave your hpf for your components the way you have it. As for your Sub, try switching your lpf to 50Hz, set your bass remote knob to center position, and re-adjust your amp gain. This will give you the ability to increase OR decrease your bass level as needed.
As for your Head units EQ, Leave it at 0. Your eq will not add missing frequencies, no matter how hard you try. use your eq to CUT freq. that sound overbearing to you. This also reduces the chance of adding distortion.
Your MM readings should be 17.32 on fronts....34.6 on sub, Yes?
Lastly, Check your polarity.

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P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals

steveg78

Ok good, I am on the right track with the hpf up front and leaving the HU flat.
Polarity has been triple checked. I will try what you said about switching the lpf to 50hz and readjusting gain. However, my math gives me 26.83v as my target voltage for the sub.

180w x 4ohm=720
Sq. root =26.83v

Here's my DMM shots for the front 2ch and the sub:
EDIT: Added amp pic.