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Enclosure Design & Construction
2008 Chevy Silverado Ext. Cab Install Help! Under Back Seats
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<blockquote data-quote="Trancer" data-source="post: 7465107" data-attributes="member: 544448"><p>Not sure why no one replied to help. This was posted over a month ago, so not even sure if you are still lurking on the message board or not. I have the Subthump deep box for 2 12's in my 2008 GMC Sierra crew cab. The 12" box will fit up to 6.5" of mounting depth. I went with two RE SE 12's. It sounded pretty dang good. Extended lows and the sound quality was great. You only get .83 cu ft of airspace before sub displacement so I was leaning towards the minimum box space recommendations, so I know they needed more airspace. I could tell they wanted more airspace just from the sound. With the windows rolled up and at full tilt, it sounded pretty crappy to be honest. I'm sure with more space, it would have sounded better with the windows up. Im honestly wondering if I should have went with two RE SE 10's instead of the 12's with the amount of airspace.</p><p></p><p>You don't have to go with shallow mount 12's. Alot of subwoofers fit this description. The RE SE 12's are pretty beefy subs. I am looking into switching my system up with doing some SA-8's ported. I know I can fit 2-3 SA8's ported, but I am doing some research and box measurements to see if I can fit more. I am having a tough time justifying going from two nice 12's sealed to 2 8's ported. I'd really like to see if I can squeeze in 4 or 6 of the SA-8's. That would be something ridiculous. After doing some measurements under my seat, I came up with 2.92 cuft of airspace before sub displacement, which is .05 cu ft and port displacement, so I really only have enough airspace for 4 of the SA-8's at .73 cu ft of airspace, before displacement.</p><p></p><p>Hopefully this will give you some insight on doing some 10's, 12's and maybe think outside of the box and doing some 8's. 3 8's have the same amount of cone surface area as 2 12's and you can go ported, which will be louder and depending on your tuning frequency, dive down lower.</p></blockquote><p></p>
[QUOTE="Trancer, post: 7465107, member: 544448"] Not sure why no one replied to help. This was posted over a month ago, so not even sure if you are still lurking on the message board or not. I have the Subthump deep box for 2 12's in my 2008 GMC Sierra crew cab. The 12" box will fit up to 6.5" of mounting depth. I went with two RE SE 12's. It sounded pretty dang good. Extended lows and the sound quality was great. You only get .83 cu ft of airspace before sub displacement so I was leaning towards the minimum box space recommendations, so I know they needed more airspace. I could tell they wanted more airspace just from the sound. With the windows rolled up and at full tilt, it sounded pretty crappy to be honest. I'm sure with more space, it would have sounded better with the windows up. Im honestly wondering if I should have went with two RE SE 10's instead of the 12's with the amount of airspace. You don't have to go with shallow mount 12's. Alot of subwoofers fit this description. The RE SE 12's are pretty beefy subs. I am looking into switching my system up with doing some SA-8's ported. I know I can fit 2-3 SA8's ported, but I am doing some research and box measurements to see if I can fit more. I am having a tough time justifying going from two nice 12's sealed to 2 8's ported. I'd really like to see if I can squeeze in 4 or 6 of the SA-8's. That would be something ridiculous. After doing some measurements under my seat, I came up with 2.92 cuft of airspace before sub displacement, which is .05 cu ft and port displacement, so I really only have enough airspace for 4 of the SA-8's at .73 cu ft of airspace, before displacement. Hopefully this will give you some insight on doing some 10's, 12's and maybe think outside of the box and doing some 8's. 3 8's have the same amount of cone surface area as 2 12's and you can go ported, which will be louder and depending on your tuning frequency, dive down lower. [/QUOTE]
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2008 Chevy Silverado Ext. Cab Install Help! Under Back Seats
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