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Oh, that looks interesting!

It will fit 1,4 inch exit drivers to begin with. I am not sure if it will be altered to fit 1,5, but I doubt it will be altered for 2 inch as the high end will collaps.

No, this is not developed by Kolbrek. I am not directly involved in this project myself. However, he does not have any commercial ambitions, and he has said that I will get go to make a version of it...

Since this drawing is made for technical purposes, it is limited to 24 edges. I could run it as 96 or 192, but it would take 4 or 8 times longer for everything I do, including rendering. With just 24...

So you would rather see the trim ring look something like this?

85089

The trim ring is a separate part, much like the gasket on most JBLs, Altecs and TADs. That means it is easily customizable.

The TAD 4003 is certainly among the all time greatest drivers out there. But, as you point out, they are no longer in production, and they are pushing 10k USD for a NOS pair.

I think the 4003s...

I just have to mention something. A very experienced horn guru in Norway has recently made a superb new horn. It reminds me of the Klipsch K402, but significantly improved. It has near perfect...

They are indeed pretty. However, there are lots of good looking drivers out there IMO. Many drivers have a look that is a direct result of their function, and that is very much true for the TAD as...

Yes, they are under hung. I really loved the idea of under hung for some time, but after a while I discovered that the flux is extremely unstable in a long gap. One could make it stable, but for a...

I do not have all that in depth knowledge about all of these, but I assume the parameters are not too far from the E-series counterparts.

The E130 and K130 are absolutely useless for any kind of...

I did a quick run in Fine Motor. I get parameters adding up when I use your cubic feet variant, and assume the force factor is completely off. I ended up with 41,3.

This is what I got in the same...

Have you measured it? Or do you have a reliable source? There is always this challenge of knowing which parameters are correct, and which are wrong.

I'd be happy to do that, but the data I have found on that driver does not add up at all. I think there has to be at least two fundamental errors in the data on that driver.

I did an experiment on this. An E130 in a long midbass horn with 1/4,5 loading. Half space, 2,83V, voltage source is shown here:

84866

84865

In real world, you would get even more SPL as...

Thanks so much all of you for the warm welcome!

For those who want to follow the driver I am currently working on, I would like to recommend the DIY Audio-thread, as I guess English comes more...

Hi guys!

I am new to this forum, so I hope I do things correctly.

One thing has been on my mind for a while. There are lots of classical and very popular drivers from JBL, Altec Lansing and...