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18” super scoop & MT121 Plans

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StoneGrove View Drop Down
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    Posted: 19 June 2025 at 9:36am
Looking for 18” super scoop plans with the back bottom cut on a slant for wheels/Castors.  

Also looking for MT121 plans. All links besides an unverified design from France is what I’m able to track down.

Any help is appreciated. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote HumbleDeer Quote  Post ReplyReply Direct Link To This Post Posted: 19 June 2025 at 3:28pm
The SuperScooper plans should be pretty easy to adapt for castors, but the size of the cut-off would hugely depend on the size of castors you'll be using.

You'd just... cut off part of the back. Then stick a piece of wood flat where there's otherwise a hole. There's no acoustic implications as long as they're all glued together as they already should be. That kind of does also mean you could do this after the cabinet was built.

Edited by HumbleDeer - 19 June 2025 at 3:29pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 19 June 2025 at 3:43pm
I would strongly recommend Mykey Scaled up Fane plan, over the Superscooper 18, unless Void V18-1000s to be used.
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StoneGrove View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StoneGrove Quote  Post ReplyReply Direct Link To This Post Posted: 19 June 2025 at 6:00pm
Thanks, I was hoping to there was plans out there with something already factored in. 

Appreciate the mykey fane scaled up suggestion.

If anyone has mt121 info or guidance on where to get the plans, it would be appreciated.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote njw Quote  Post ReplyReply Direct Link To This Post Posted: 19 June 2025 at 9:22pm
Originally posted by StoneGrove StoneGrove wrote:


If anyone has mt121 info or guidance on where to get the plans, it would be appreciated.

 The plans are on here, click on the 'speakerplans.com' logo up there ^^.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote APW Quote  Post ReplyReply Direct Link To This Post Posted: 19 June 2025 at 9:39pm
Originally posted by njw njw wrote:

Originally posted by StoneGrove StoneGrove wrote:


If anyone has mt121 info or guidance on where to get the plans, it would be appreciated.

 The plans are on here, click on the 'speakerplans.com' logo up there ^^.

The plan on here is for the MT122 (2x12 mid horns + 1xHF between the two mids), I believe the 121 is just the 122 but with the top Mid horn removed. 
The text above was originally written by a human but was 'perfected' by AI. Any remaining grammatical errors are proof of AI's uncanny ability to misunderstand while exuding absolute confidence.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StoneGrove Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2025 at 9:31am
Yea it’s not the mt121. I made the post to try and get plans that didn’t need modification. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2025 at 9:47am
well the 12" section remains the same.

and above the 12" you may as well modify it slightly to fit whatever high frequency horn you're going to use.

all box building projects will require a bit of figuring out even with a plan.

they're a difficult build.. there is also somewhere a plan someone made for a "simplified mt121" with straight horn sections. have a look for that maybe?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote njw Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2025 at 10:03am
Originally posted by APW APW wrote:

Originally posted by njw njw wrote:

Originally posted by StoneGrove StoneGrove wrote:


If anyone has mt121 info or guidance on where to get the plans, it would be appreciated.

 The plans are on here, click on the 'speakerplans.com' logo up there ^^.

The plan on here is for the MT122 (2x12 mid horns + 1xHF between the two mids), I believe the 121 is just the 122 but with the top Mid horn removed. 
 
If you have the plan for the double version then you have all the information and detail you need to build a single version.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote njw Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2025 at 10:04am
Originally posted by StoneGrove StoneGrove wrote:

Yea it’s not the mt121. I made the post to try and get plans that didn’t need modification. 

 As above, all the info you need is on the double plan.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2025 at 12:46pm
Originally posted by njw njw wrote:

Originally posted by StoneGrove StoneGrove wrote:

Yea it’s not the mt121. I made the post to try and get plans that didn’t need modification. 

 As above, all the info you need is on the double plan.


As mentioned above, just use he MT122 Plan, and build with 1x 12" section not 2x.

Personally prefer MT121 orig plan with 1x12", as opposed to the TDA 121, straight horn version.

Have heard both, and MT121 with 2x part horn, to my ears, plays louder, projects further than TDA MT121 straight horn version.

Here is video of 4x MT121s, accidentally covering approx 1000 people, outside.

Was supposed to be small 2012 Royal Jubilee Royal celebration, but as sub and tops could be heard miles away, Broadwater Farm, Tottenham was packed until midnight.










Edited by levyte357- - 20 June 2025 at 12:48pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2025 at 12:57pm
Re:Scoop plan.

Would prefer 636mm wide version of this over Superscooper, will perform better, with many modern drivers, also the extra bracing from the angle Scoop section.

Also, very easy to add the rear bottom angle for (100mm blue quality castors Wink).

https://forum.speakerplans.com/fane-scaled-up_topic74640.html


If using neo drivers, would suggest removing 2nd internal baffle. to increase chamber depth. from 190mm to  to 208mm.



Edited by levyte357- - 20 June 2025 at 1:19pm
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