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  #1  
Old 08-12-2015, 09:29 PM
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Default DD Z 6th order help!

I haven't posted a build log here, but might if people are interested. I have a 2007 Silverado Crew cab that I took the back seats out of. I currently own two DD Z 12's, but will be getting them re-coned into 18's after I sell my other subs.





I've been doing some thinking. Below the window line in the back, I have 34 cubic feet with both front seats pushed all the way back and at my normal angle. That's way more room than I need for two 18's. I saw this and it got me interested:



Who could design something like this?

DD recommends 6.5 cubes for 18" Z's in ported boxes. I'd say I could maybe squeeze 30 cubes of actual airspace out of a 6th order. I'd just like to be able to play 25-70 hz with authority. I want relatively flat and good low end response, but also want to be as loud as possible with these two subs.

If anybody has experience with 6th's or knows somebody who does, would I have enough room for one?
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Old 08-13-2015, 09:16 AM
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Bump, need some advice or contact info for anyone who could design it.

Anyone know what ratios are good?
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Old 08-13-2015, 09:36 AM
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Ram designs. BHE are acouple box designers
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Old 08-13-2015, 10:19 AM
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what are your max dims? i'm bored
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Old 08-13-2015, 11:01 AM
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Quote:
Originally Posted by massivespl View Post
Ram designs. BHE are acouple box designers
Have heard of Ram Designs. Do they have a website or do you have contact info for them?

Also, Excessive Amperage never emailed me, so I'm going to call them today

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Originally Posted by stssilverado View Post
what are your max dims? i'm bored
63" sideways across the bottom. 42" front to back on the bottom. 34" front to back on the top. 24" of height to stay under the window line. I am willing to go higher if need be. Already got the floor cut:

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Old 08-13-2015, 11:22 AM
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Just emailed Ryan at Ram Designs. Hopefully they can design one for me
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Old 08-13-2015, 11:40 AM
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less than 25ft^3 with those dimensions. too small for an effective 6th in my opinion.



that's double walled 1.5" on all panels
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Old 08-13-2015, 11:43 AM
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Do a 6th with the 12s u got
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Old 08-13-2015, 11:47 AM
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Quote:
Originally Posted by massivespl View Post
Do a 6th with the 12s u got
i too concur with that, you could build a fully optimal 6th with the 12s rather than trying to make it work with the 18s... space makes bass
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I've never, not one time, seen a gain from 45's. People think of ports as a wind tunnel. They don't work that way. They resonate. They don't produce wind. If it was a wind tunnel, 45's would be more than justified. But it isn't.
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Old 08-13-2015, 12:36 PM
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Yea i dont see it happening effectively, maybe 15s. if you went 12-16 in the rear that leaves you upside down for your front chamber and the port you will need
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