I just sold my Fi bl 12 and box that was 2.5 tuned to 32 hz. Also sold my Kenwood KAC-X1R. I want to downgrade sub size to either one 10 or 2 10s. I want this new setup to be louder because I got used to the bl and want more. Stock battery with big 3 and not going to upgrade that. I am almost set on the MB Quart dsc1500 but dont know about the sub/s. My budget is 500 for amp and sub setup. I am looking to port the box unless I am recommended some to seal that will be loud. I was looking into 2 sdc2.5s but after shipping they are over 3 which i cant spring for unless i get a cheaper amp. Just looking for suggestions on this since its been a 2 years since ive searched and talked to you guys. The box cant be bigger than 2.5 because its in a mustang trunk....tiny. Live in a small town so all i hear is the mainstream crap and occasionally memphis. I like the Fi and AQ type companies. Thanks guys.