Sub recommendations

redondoaveb

If you were pulling the entire crappy bose system out and upgrading the wiring, the speakers and new amp(s) then I could see where an enclosure with a 12" sub would be more beneficial but since it sounds like you're keeping the rest of the bose system minus the hu, then it is a perfect alternative. I don't know anyone that has installed this sub and had any complaints about it. It works great.

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

TJSq

For $300 I just don’t know how much better it would be than stock. Is there much of a difference?

redondoaveb

Night and day difference. I wouldn't recommend it otherwise. I'm not here to try to sell you one, I'm just giving you my experience with it.

Here's what another poster from my original thread had to say about it, but of course you probably read it.

"Sub will rattle the rear view mirror easily.. all the Bass I need, although I’m not one to play it so you hear me 2 blocks over. That being said, I still need to ‘feel’ the bass."

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs