mt 18 box tuning

[matrxx dude 5,000+ posts]

ok i just built my 18 a box,heres the specs,these are inner dimensions,20.25 deep,by 40 inches wide,by 18'' tall,ok my port is top to bottom left rear corner,6''x18'' by 16'' port length,my question is can someone tell me wat about frequency its tuned to,i think its somewhere around 47hz,and also is my port area to much.its in a 98 ford explorer with a orion 2500d on it.thanx

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[matrxx dude 5,000+ posts]

anyone?