Vathek

No, I'm just looking for an alternative to the K-402 given its high cost and unavailabilty in Europe. But if you're not interested in any such discussion that's fine and I shall oblige.

Thanks everyone. The reason I’m looking at the SEOS-30 is mostly build simplicity. I’m in a big city with no back yard, garage or anything like that to use for wood work. So for something based on Bill’s spreadsheet I would have to hire a carpenter and then things get expensive quickly. Whereas a rectangular CLD box can be built at home with pre-cut wood from one of the various home depot like stores here. What intrigued me about the K-402 MEH in this thread was the omission of the midrange cone drivers by using a large compression driver, which makes it so much easier for this ready make approach. Most threads / projects go the 1-inch plus 4-inch cone midrange route, this is why I posted here. I’m fully aware a SEOS-30 will not control directivity down to Schroeder frequency unless I put it in my shower, but if that was a sine qua non criterium there would only be a handful of speakers in the world in the first place. It’s a compromise I would be willing to live with. Since autotech don’t put their prices on the website, I’m not going to make them public here, but you could easily get a surround system for the price of a single K-402 and they’re extremely well built from about 10mm thick fibreglass (which might be just about perfect for the woofer taps). And in Europe they’re readily available, I’ve bought several of their smaller waveguides from them. I realise that the situation might be pretty much the opposite in the US. Also I would aim for a x-over point around 400 or 450 Hz or so, which allows for more (and cheaper) options than the Axi2050. I’m not trying to make the argument that any of this is better than the Axi2050 on a K-402 (not at all!), but three pieces (LCR) of that combo would set one back around 10k over here, and that’s just for the horn and the compression driver. Whereas a couple of 12-inch woofers and a BMS 4590 on a SEOS-30 would cost somewhere around a grand per channel. And the 400 - 450Hz crossover has been proven to work in many MEH’s with the 1-inch plus (one or several) 4-inch midranges. If I had (access to) a proper wood work shop, I would absolutely pursue the plywood version based on Bill’s spreadsheet. The whole idea behind this is to find a solution that is as ready made as possible and here the SEOS-30 seems to be the second best option after the K-402 at a much lower price point and at least in EU it’s easily available. The BMS 4590 is more expensive than a 1-inch and a couple of 4-inchers, but it’s “bolt on and done”. The key to the whole thing is the choice of woofers and the location, shape and size of the woofer taps and maybe some sort of ‘mounting construction’ for the woofers. And that’s really what my question was aimed at. I realise that was way too implicit in my initial post. And if nobody has done this with a SEOS-30, I guess I’ll have tackle it myself. But I haven’t even been able to wrap my head around Hornresp, so this might prove to be a challenge.

First post and not even Klipsch related, but I think reasonably on-topic in this thread: Since over here in Europe K402 are special order through pro install dealers and prohibitively expensive, has anyone here thought about MEH-ing a SEOS-30 or even done so? That's the biggest easily obtainable ready-made horn suited for the job and relatively cheap. The flat conical surfaces should make it easy to work with regarding woofer mounting / porting too.