So i only have like ~180 watts from the back two channels on my amp it is a JL J2 320.4.  Im on a budget like mad here unfortunately and that amp was $99 not seeing anything else for that kinda money recently.  So i snatched it up.  I am running the front two channels on boston acoustic rallye series 5.25 co-ax, the back two channels will be bridged to a subwoofer that amp will do 60x4 at 4ohm 80x4 at 2 ohm.  Ive read they are a tad bit underated so 160-180 watts is all i can expect.  If i buy and X will that be enough amp sealed?  I dont really think i wanna get a ported box right now.  Ive not had bass for 3 years+ so im kinda starting out very slow but quality cause i may never upgrade again.