DIY transmission lines

Anyone had a stab at building a transmission line speaker? Friend of mine is looking at doing so but not convinced by some of the designs/plans available to purchase

I’ve got a set of Pensil 11 transmission lines speakers, I didn’t build them but they did sound quite good (until the removals guys mullered the driver cones)

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IPL Acoustics used to be the easy go-to but I believe has now closed.

The kits from Stefan at KJF are excellent, really easy to assemble and nice quality wooden parts.

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This is what he was currently thinking of doing - I’ve no way to evaluate this sort of thing. It’s also interestingly a standmount transmission line

I built a set of 3 way IPL speakers 20 odd years ago, documented it in zerogain and still use them to this day.
The woofers are a bit ragged and farty these days and need a re-foam after failing to buy a replacement set from France.
Overall they are great for the types of music I listen to, great fun with ridiculous bass but not the most accurate so it’s going to depend on their musical tastes.
Pounding techno, uk hardcore, trance, dnb etc. then they are great, poorly recorded jazz and blues or string quartets and it’s not really their forte. They’ll make an ok fist of it but a more agile speaker would probably suit.

Absolutely no way was it that long ago!!

No you’re right it wasn’t 20 years. It was 19 years and 10 months when I started.

God we’re fucking old.

And it’s still the same old reprobates regurgitating the same old shite.

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Geez!
First reply and it seems almost sensible.

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Until the posts about the sounds of boxes the crossovers are put in…

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Did you ever sort the curtains?

That’s awesome - even if the speakers themselves aren’t to his taste, I suspect there’s a lot of useful information in that build log to digest.

I do suspect they won’t be what he’s after - he comes at this from a live engineering sort of perspective (did sound engineering at Salford back in the day etc), so I think something more sterile / “accurate” is going to be more his preference here.

This set?

https://www.iplacoustics.co.uk/S5tl%20Kevlar%202.htm

Troels did one recently but won’t be cheap so a leap of faith as to whether your friend likes the sound.

http://www.troelsgravesen.dk/Ekta-TL.htm

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Similar, an older version without the ribbon tweeter or Kevlar woofer.