well my 18" avalanche will be here in june so i was gonna start on my box now. My measurements are H-18.75", W-50", D-28", with a total volume of 12.83^3ft tuned to 24hz. at 24hz i dont have to put a piece turning into the box but i could lower the frequency some if i added a small piece there. do u think this will hurt the boxes performance without the L shape on the end of the slot port or will it be ok
