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Bill Fitzmaurice - Omnitop 12s (built by Insomnia)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote all bass Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2013 at 3:47pm
The shape of the omnitop 212 is just a variation on a very basic 2x12 horn that has been used for a long time. The thing that is really something unique is the melded tweeter array.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2013 at 1:22pm
Can someone correct me if im wrong is this the Original Omnitops 12s ?? Yes or No the reason why im asking i seen loads of differenet pics online/forums ect that are single 12s, a row of piezos running vertical twin 12s ect ect but there called Omnitops 12,

what drivers are recommend for this cab too? , or orther alternatives drivers

so are some of these modded cabs?

thanks 






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Post Options Post Options   Thanks (0) Thanks(0)   Quote trentp Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2013 at 6:14pm
Hi Stu, can these perform well above some ES18'S and Hogs? I need to build some simple but adequate tops.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 28 January 2010 at 11:59am
My Omnitop 12s as depicted on the first page of this thread are now up for sale.

Looking for £550 for all 4, simply to help cover the cost of having a pair of OT15s built (priorities change so my PA needs to).

PM if interested, a member of BFM site already has first refusal.

Stu

All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output

My acts:
www.myspace.com/thebowiexperience
www.myspace.com/scheisseelektronisches
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Strange Daze Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2010 at 4:41pm

Originally posted by djscooby djscooby wrote:

Does anybody have the plans for the omnitop12s and omnitop15s please fancy havin them built for me


The donation is only a couple of quid on the site mate......support the designer and all that :)




Toasty.....Dan's OmniTops are awesome. Such a SUPER light cabinet, even when loaded.

I love them to pieces. By far the nicest sounding sub <£200 box you can make in my opinion.



Edited by Strange Daze - 04 January 2010 at 4:42pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djscooby Quote  Post ReplyReply Direct Link To This Post Posted: 03 January 2010 at 11:44pm
Does anybody have the plans for the omnitop12s and omnitop15s please fancy havin them built for me
Well my wife has kicked me out saying it's over due to my obsession with speakers don't know watt I'm gonna do with no ohm to go to
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2008 at 9:42pm
When I built mine melded array was not an option, but now it is THE only option in a lot of the plans so I would go with that.

Piezo sensitivity means nothing, bear in mind that the double element is just that 2x elements so its going to be 6dB louder anyway, also its not really about that you are using 12 1016 piezos in a melded array, 3x 1177 elements in series (which is 3 bank series parallel if you are using single tweeters) is enough to keep up with the woofer and give equivalent to 900W power handling. The benefit of the melded array is wider dispersion and lower frequency response which just helps to smooth the crossover point.

Stu
All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output

My acts:
www.myspace.com/thebowiexperience
www.myspace.com/scheisseelektronisches
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Insanity Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2008 at 9:22pm

I've just got some plans for the Omnitop 12 and initialy intend to build 4, if I like 'em I'll build another 4. 

Stu, you say you used the 'double element' type piezo, these: http://cpc.farnell.com/LS02368/audio-video-tv/product.us0?sku=unbranded-mpt-177
 
how did you wire them? did you use a resistor?
 
The spl on these is 99db, is that the efficiency of  the ones you used?
 
I see some people have used these:
 
they are only 91db, not sure these would be as good?
 
I need to order the peizos and was going to get the doubles but do the singles have any advantages? 


Edited by Tony Insanity - 01 June 2008 at 9:28pm
.....you might also look for her companion, a large Chinese rabbit, who is easy to spot since he is only standing on his hind feet in the shade of a cinnamon tree...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2008 at 6:46pm
Originally posted by Steak'n'ale Steak'n'ale wrote:

Sheffield/Manchester. Whats this PU adhesive? When I used to build with Davey T we used PVA and it worked ok.


I used PVA and it worked fine, if you know you can build to tight tolerance thats fine, its only because a lot of woodworkers are noobs Bill recommends the PU adhesive which expands to fill any gaps and saves you lots of potential problems if you have an air leak in your joint that you dont put enough PVA in to fill.

Stu


All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output

My acts:
www.myspace.com/thebowiexperience
www.myspace.com/scheisseelektronisches
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2008 at 12:48pm
Steak'n'ale: PM soundsystemdan, he's halfways between Sheffield and Manc and has made Omnitops, so should be able to give you a few tips.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steak'n'ale Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2008 at 10:26am
Sheffield/Manchester. Whats this PU adhesive? When I used to build with Davey T we used PVA and it worked ok.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2008 at 12:42am
1/2" = 12mm

So long as all the bits fit together snugly thats all that matters, just stick to inches, draw the parts out and use lots of polyurethane adhesive.

Where are you based?

Stu
All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output

My acts:
www.myspace.com/thebowiexperience
www.myspace.com/scheisseelektronisches
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