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Tham 21 info please!
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Angelow View Drop Down
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Points: 223 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Angelow Quote  Post ReplyReply Direct Link To This Post Topic: Tham 21 info please!
    Posted: 15 August 2025 at 1:07pm
Hi! I'm writing from Italy.
 I've already built the Tham 15 and Tham 12! I saw the Tham 21 mentioned on the Martinsson's blog, but I can't find any details! Could I have a link to the project? I'd love to build it! 
Could I know where I can find the drawings and data to insert into HornResp to simulate it? I'd like to use the 21NLW4100 21nlw9001 woofer.

Thank you very much and have a great day!
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BJtheDJ View Drop Down
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Points: 974 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BJtheDJ Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2025 at 3:07pm
This is the Tham family from Martinsson's website

Can't see a Tham 21 there, it only goes up to the Tham 18.
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Angelow View Drop Down
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Points: 223 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Angelow Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2025 at 5:24pm
on page 9 it talks about it, I tried to contact him but the site doesn't work and as soon as I send the message it doesn't send it leaving a blank page :(
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snowflake View Drop Down
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Points: 3443 		Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2025 at 5:32pm
never seen any discussion of a Tham21 - are you sure it isn't simply a typo of Tham12 ?
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DMorison View Drop Down
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Points: 1740 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2025 at 11:38am
I think it was talked about but only ever went as far as a bit of exploration in the modelling realm, I'm pretty sure there was never a box built or plan released.

The quote @Angelow is referring to on Anders' blog is (emphasis mine):
Quote
The theoretical results also points to that this might be the way to go for a future 21" version, below you can see two examples of THAM18 simulated with the 18TBW100 and THAM21 simulated with 21SW115.
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Andylaser View Drop Down
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Points: 392 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Andylaser Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2025 at 1:32pm
There was some brief chat on DIYAudio.
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Angelow View Drop Down
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Points: 223 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Angelow Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2025 at 2:57pm
I saw the post, but I was talking about the official chart on the blog. An F3 COS for a 12" would be fantastic. XD

Anyway, what compact TH do you recommend for a 21"? Would a "hybrid tapped" cube be good too?
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