I cannot choose a sub to buy. although i have picked out a few i am intersted in. I really like low notes, so the sub has to play good low notes. I will put the sub in a ported box. it will be pushed by an audioque 1200d or 2200d. I just wnat to know which will be louder and better. 1.Audioque hdc3 15 2.Soundsplinter Rl-p 15 3. Fi BTL 15 4. Orion HCCA 15 5. Cascade Designs Omega 15 Those are subwoofers i seem to like, if there are any that are really good that i am missing and you think it fits me then tell me, only if it is in the price range of 250$-400$ Thank you for your time Edit- I have a jeep grand cherokee so i have alot of space and no eletrical upgrades, but willing to get another battery.