Need help with SQ subs

[Destroyerzx1 10+ year member]

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?

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[Joe562MMA 10+ year member]

Whats the budget for sub

 

[Why So Cereal? 5,000+ posts]

Don't mix subs

 

[mylows10 5,000+ posts]

if he builds a ported box for the 12 and gets the 8's out of there ,it will prolly be louder ,may have some sub cancellation going on in there

 

[Joe562MMA 10+ year member]

Don't mix subs

What he said.

 

[Destroyerzx1 10+ year member]

budget is $250 and the 8 is for the mid bass. just need a decent 12 the replace the pioneer. he wants to keep his old box so it will be goin in a sealed box of .8 cubic ft

 

[Why So Cereal? 5,000+ posts]

The 8 needs to go. Midbass should come from a good front door install.

 

[Destroyerzx1 10+ year member]

alright well thanks anways went with a SA12. was a simple question of what 12 to get not what 8 to throw away.

 

[Why So Cereal? 5,000+ posts]

Cool now throw the 8 away.

You came here for advice on how to improve upon the system...you have a few things screwed up just from the description u gave of the the setup.

You still won't get the performance you could be getting.

 

[Destroyerzx1 10+ year member]

Cool now throw the 8 away.
You came here for advice on how to improve upon the system...you have a few things screwed up just from the description u gave of the the setup.

You still won't get the performance you could be getting.

I didn't get any advice was the problem at no point did anyone recommend a 12 not helpful. not everyone is looking for what your looking for in a sound system keep that in mind.

 

[Why So Cereal? 5,000+ posts]

I didn't get any advice was the problem at no point did anyone recommend a 12 not helpful. not everyone is looking for what your looking for in a sound system keep that in mind.

No one looks to spend money and still be dissatisfied. That's where this is headed.

 

[supermaxx123 10+ year member]

Idmax 12. Honestly though you can't expect more bass out of a .8cu/ft sealed box especially that combo. Also I'm guessing .8 without the sub...

 

[tc300 10+ year member]

I didn't get any advice was the problem at no point did anyone recommend a 12 not helpful. not everyone is looking for what your looking for in a sound system keep that in mind.

Dude just do a Google search and see how many SQ cars have an eight and a 12 in the back... Lol. As said before midbass should come from a good door install. While you're there you should've just googled SQ subs also.

And your brother wants to keep that box that was for a shallow mount sub... SOOOO NOT GONNA WORK BRO!!