opinions Rockford p3sd2-12--amp

[JerseyGuy]

hey guys, I am running a rockford p3sd2-12 in a rockford sealed box-- yes I know shallow is not the best-but its what will fit--

Currently running it 4 ohm mono with an orion extreme 375--it sounds good--I am getting some serious box rise-- as v/a tells me its 10 ohms.@60hz test tone-bluetooth

#1-- is that normal?

#2 would I see a decent increase in output if i wired the sub to 1 ohm and used my hcca 225 on it?

or if I hooked up my 2150sx---would I fry it? ---

to sum it up-- am I already pushing the limits of this sub-- how much increase in performance would I expect from an extra 125 watts--or 250watts-- thanks-Fred

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