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Old 11-28-2018, 03:10 PM
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Question SPL Box for 12W7's

Can Anybody help me with a box design? I have the specs for it:
4 cubic foot net volume with 50 square inches of port area. Port length of 17,375 inches for a tuning of 38 Hz
I am going to try to look into some internet box calculators but I doubt they will be any good..Thanks all
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Old 11-30-2018, 03:04 PM
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@Iamsonic does box designs for $35. You get 3d drawings and cut sheets. He does great work .
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Old 11-30-2018, 07:29 PM
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That's too high of a tuning for those W7's. I think they like to be tuned low....I mean Why wouldn't you tune them low to begin with. I never go above 35Hz in my box builds.
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Old 12-01-2018, 09:50 PM
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Well, I actually did not come up with the specs on my own. I emailed manufacturer directly about this and I also asked about specs for an spl application. I figured since they are considered SQ subs for the most part I thought I would compensate some of that for some extra SPL. I know the recommended specs for vented enclosures are 1.75 cu ft. and smaller vent, also 32hz tuning is recommended. I am just curious what these SPL specs would look like when enclosure is done. I started with one 12w7 and I bought it with a custom 1" t line box to specs, it sounds really nice but I need it louder. I am not even sure if they go louder than they go now but am very curious what these specs and higher tune will do. Also, from my understanding a higher tuning does not necessarily mean the sub wont hit the lower frequencies, it just means it will hit more effeciently/louder around that frequency? Since JL is known for the clean lows I also figured I would have compensation room in this area as well. Perhaps maybe these subs can really pound at that frequency (38hz)? Kind of a cool project to me. I know JL is being criticized more and more, just a long time fan who wants to see if they can Bump Bump for real like I mean feel the SPL a little more. They do still sound pretty powerful as is but dont think the boxes are right, I feel the specs are tuned for sq for both sealed and vented. I may be wrong I may be in denial
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Old 12-08-2018, 10:18 AM
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Quote:
Originally Posted by BoomBoomBoomBBoom View Post
Well, I actually did not come up with the specs on my own. I emailed manufacturer directly about this and I also asked about specs for an spl application. I figured since they are considered SQ subs for the most part I thought I would compensate some of that for some extra SPL. I know the recommended specs for vented enclosures are 1.75 cu ft. and smaller vent, also 32hz tuning is recommended. I am just curious what these SPL specs would look like when enclosure is done. I started with one 12w7 and I bought it with a custom 1" t line box to specs, it sounds really nice but I need it louder. I am not even sure if they go louder than they go now but am very curious what these specs and higher tune will do. Also, from my understanding a higher tuning does not necessarily mean the sub wont hit the lower frequencies, it just means it will hit more effeciently/louder around that frequency? Since JL is known for the clean lows I also figured I would have compensation room in this area as well. Perhaps maybe these subs can really pound at that frequency (38hz)? Kind of a cool project to me. I know JL is being criticized more and more, just a long time fan who wants to see if they can Bump Bump for real like I mean feel the SPL a little more. They do still sound pretty powerful as is but dont think the boxes are right, I feel the specs are tuned for sq for both sealed and vented. I may be wrong I may be in denial
3cubes with 35 of port tuned to 32hz should do nicely
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Old 12-08-2018, 09:19 PM
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How do I start a new thread??
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