alright so my brother has a JL 750/1 and is running a pioneer slim 12 sub with a JL 8w7. I tried My 12w6 in place of his 12 and it hit pretty good could have been louder but was only running 300 rms. He has a jeep Cherokee he wants a sub that hits the lows harder then his current sub, but something with rms around 400 or so. He plans on running the JL amp at 7 ohms so that he can get 428 watts at the 12 and 8 will get 321 watts. he needs a sub that is either dual 2 ohm or single 4 ohm. he'd like to use the box that his pioneer is in which is a sealed .8 cubic foot box with a mounting depth of 9". he's looking for a SQ sub and has a budget of $250 what do you guys recommend?
he's currently looking at an RE SEX12D2, I've heard a mtx 12 7500 series sub about 7 years ago and for the price they sound really good in my opinion but they discounted that model do you know what the replaced it with?