dual 12 mid cab?
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Category: Plans
Forum Name: Other plans
Forum Description: Discussion / Questions about all the other plans
URL: https://forum.speakerplans.com/forum_posts.asp?TID=77432
Printed Date: 26 March 2026 at 6:54pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: dual 12 mid cab?
Posted By: ziontrainsound
Subject: dual 12 mid cab?
Date Posted: 24 March 2013 at 11:42pm
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i was thinking about designing a dual 12" mids cab, two of which i would stack on to my b&c sub18's. in mind i had the Fane Sovereign Pro 12-500 which i sim'd two drivers in a reflex cab with 75l tuned to 65ish hz and with 2 cabs i could get a continuous spl of 129db at 500w pretty flat up to 1000hz where i would cross them over to horns. does anyone have any insight on the idea? also, i am on a tight budget so a multi thousand euro system is way out of reach  right now i have 2 sub 18's and db technologies cromo 12 midtops which i would want to replace with the dual 12 mid cabinets and 2 Eighteensound HD1480T horns best regards |
Replies:
Posted By: _djk_
Date Posted: 25 March 2013 at 9:55am
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Those look like a very nice driver. Here is a similar Eminence driver (0.84dB more efficient), the Delta Pro 12a in a 50hz ported box crossed to a large format compression driver around 1.2Khz ant to my PPSL for the low end at around 150hz. The tops are flat to 50hz on their own for use on small jobs, FOH tops in medium-to-large jobs, and as side or front fills in the largest gigs with dual 12 horn mids.  ------------- djk |
Posted By: ziontrainsound
Date Posted: 25 March 2013 at 10:01am
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so you think it will work, just slapping these drivers in, tuning it at 65hz and using that as mid over the sub, crossed at 100hz? that would make me a very happy man!! also, neat looking system you to there!
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Posted By: ziontrainsound
Date Posted: 25 March 2013 at 10:53am
could you tell me what the volume of that cab is? looks like 100l for the two 12's? i'm just unsure of what volume i should use for the design 
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Posted By: ziontrainsound
Date Posted: 25 March 2013 at 2:14pm
 i sim'd the mids, with the figures of the sketch. have to say, i think it woud work out very well, as the sensitivity also is quite hich with the fane's in the midtop cab. as for the mids, the average sensitivity lies at 100.6db, so with 500w rms one cab will get me a good 127.5db with 130.5db peaks and i would build at least two of them and for my purposes 130.5db rms for the midtop are more than sufficient. the eighteensound HD1480T also does 127db rms per driver, so the whole systen should sound really nice and balanced. does anyone have any input to the whole thing, specifically the design of the midtop? best regards edit: the purple line is the b&c sub18 and the green is my midcab. also, the chamber for the fane's has 80litres without drivers, so with i roughly guessed 70 with the drivers in, thus the port length of 190mm
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Posted By: _djk_
Date Posted: 26 March 2013 at 2:05pm
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Mine are perhaps a bit larger than what you have in mind, 140L tuned to 50hz. You have the right idea though, check it in a speaker program.  . ------------- djk |
Posted By: ziontrainsound
Date Posted: 26 March 2013 at 7:16pm
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i wanted to keep mine as compact as possible, so i think i'll compromise to something around 110l-ish and tune it to 50, i'll sim it when i get home tomorrow, so it should give me enough bass response and for the actual mids over a few hundred hz the box size & tuning become rather irrelevant anyway. you recon that would work? |
Posted By: ziontrainsound
Date Posted: 26 March 2013 at 7:28pm
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also, one thing confuses me in your picture, namely the sensitivity of the driver, because on 8r speakers the 1w = 2.83v spl, yet on your picture there are two different values for the sensitivity... am i missing something? best regards |
Posted By: _djk_
Date Posted: 26 March 2013 at 8:22pm
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The top graph is 2.83V, the second is 800W on the dual 12, the third is 1200W on the sub. It's all marked and color coded. 2.83V is 2W since both designs are 4Ω, perhaps that is what is confusing? ------------- djk |
Posted By: ziontrainsound
Date Posted: 26 March 2013 at 8:29pm
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okay it makes sense now, thanks! i could also use the eminence delta pro 12's, but here they're roughly 40 euros more expensive than the fane ones which i had in mind, but they should do! i'll post sims of a larger box in a couple hours or tomorrow morning with a larger box tuned to 50hz. the problem is that in winisd the gain always goes to 0db towards 1khz, but can i just assume that the dual 12's will play flat to 1khz or should i buy bassbox pro to check that? |
Posted By: ziontrainsound
Date Posted: 26 March 2013 at 10:26pm
 i simulated a 110l mid cabinet, subtracting 3.5l per driver, becasue i noticed that 5l could't be right since my rcf 18's have 5.5l displacement. anyway, i tuned it to around 60hz, which give me a nice flat curve with a slight boost on the 100hz mark for the kick/high bass. i have one more question though: do i need to have the 12's seperated from the hf horn or can i have them in one chamber? that would save space and thus make the cab a lot lighter. cheers
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Posted By: _djk_
Date Posted: 29 March 2013 at 10:28am
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"i could also use the eminence delta pro 12's, but here they're roughly
40 euros more expensive than the fane ones which i had in mind, " In the USA Eminence is very affordable, on your side of the pond I might use the Fane. Blue Aran pricing. Fane Sovereign Pro 12-500 £103.18 inc VAT Eminence Delta Pro 12 £103.02 (I assume that includes VAT?) In the USA the Eminence Delta Pro 12 costs me $83 at 10+ quantity, the Fane Sovereign Pro 12-500 is $155 (easy choice). "i have one more question though: do i need to have the 12's seperated from the hf horn or can i have them in one chamber? that would save space and thus make the cab a lot lighter. cheers" One common cabinet is OK. If the horn is really thin or flimsy I add Moretite caulk (a putty-like substance) to the backside, or a layer of the spray-foam-in-a-can. ------------- djk |
Posted By: Venny14
Date Posted: 18 November 2013 at 1:51am
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Hi, Do yu want pure mid range cabinets or would you like your high frequencies all in the 1 box? I have designed a 2 x 12" sealed enclosure to provide midrange for my reggae/dub/jungle sound system. These box are very simple to build and play 100hz-1khz with a very flat response. The low response is useful if you in a small venue, so they drop low enuf to meet scoop bins. eliminating the need for low-mids if yu stack too tall for the venue or someting. Happy to share plans if you would like. Venny. http://imageshack.us/photo/my-images/6/owej.jpg/" rel="nofollow">  http://imageshack.us/photo/my-images/823/y8qe.jpg/" rel="nofollow">  ------------- Because thats how I like to do things, Thats why. |
Posted By: Venny14
Date Posted: 18 November 2013 at 2:00am
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We run single 1" compression drivers on a metal horn above these midrange box. (1000hz-18khz) Also we fit 3 x NL4 speakon connector on the 2 x 12" box's and only need to run 1 cable per pair of midrange and tops. Do this by using 16ohm 12" drivers and 4 core cable. Let me kno if yu want any help with the single cable wiring also. Thanks http://imageshack.us/photo/my-images/6/lwrc.jpg/" rel="nofollow">  ------------- Because thats how I like to do things, Thats why. |
Posted By: Dub Specialist Sound
Date Posted: 18 November 2013 at 11:20am
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imho i dont think it matters , down to your preference really seen nuff reggae sound today and later using just mid and mid/high boxs, built my own twin 12" MTM kind of design with 2xbullets ,got some 10"s mids too when i feel like using them according... ------------- Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE... |
Posted By: atnt
Date Posted: 31 October 2014 at 7:57am
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hello venny we have a free tekno sound system and we are just building our new speakers im really intersted in your dual 12" speaker will b happy if u can send me the plans/// thanx morAn |
Posted By: Weathermansounds
Date Posted: 11 January 2026 at 9:31am
| Hi, sorry to jump on this old thread but was wondering if you may share the dual 12” sealed mids plans. I’m currently looking to change mine :) |