i would like to know which would have the better SQ in a small(er) ported enclosure tuned very low (23-25Hz). i can get the 12" R $10 cheaper than the eclipse, but the eclipse being 10" might have a better fit in my wrx trunk. spl comes second being that an RL-p powered with 500 watts makes the brand new car rattle from front to back, but i would appreciate the potential to get loud once in a while.