Droogne

EDIT: I forgot to include the larger horn mouth when coupling the LaScalas. Modelling this by going from 2pi to 1pi allows for more hornloading into the lower ranges which significantly flattens the response at 80hz. Using the drivers in parallel and the appropriate RMS to reach the Xmax limited output at 80hz I get this response: This looks already way better! Almost the 135dB I require. Might model some more woofers to achieve even better responses (with lower displacement at 80hz for better sound quality).

Driver simulation will be for a 80-150hz range. Yes this a very narrow range, but it's still in the LaScalas hornloaded range and I already have them. I might use completely different cabins, but the simulations will tell me if I actually have to. Em Kappa 15A: Xmax limited output at 80hz (0dB), 2pi. Reason for modelling can be best shown with a displacement graph showing the Em Kappa 15A at 80hz: It's clear displacement skyrockets around 120hz.. I actually need a -3dB or -6dB point around 80hz, which is easy with the natural roll of this setup, but I need more displacement to allow the driver to be used fully down to 80hz. At this Xmax limited 80hz point I would end up with a 125dB (-3dB) or 128dB (-6dB) lever from 110hz and 130 respectively. And yes, 80-150hz is a narrow range, but it does mean 2 things: 1. using more of the hornloading the LaScala provides 2. Being able to stack the LaScalas when lowering the 150hz to 143hz. 1/4th WL of 143hz is 60cm, which is the exact distance between the acoustic center of a pair of stacked LaScalas. Acoustic coupling will increase the output with an extra 3dB on top of the +3dB from doubling the amount of bins. So +6dB total extra output. => a stacked LaScala pair loaded with a Eminence Kappa 15A would result in a 128dB level at 80hz, and 131dB at 110hz (which will be the level where I will flatten the response to actually be within 3dB of 80hz). For my project I needed 135dB at 80hz, so it's pretty far away from this. It looks like the displacement will be the deciding factor in the output at 80hz. Using a -6dB crossover point might also help. If the Em Kappa 15A would be able to be used at its full RMS power the output would be 128dB at 80hz! So 134dB for a pair, which is almost exactly where I need to end up.

Thanks man! Here is the output of my LaScala loaded up with an Eminence Kappa 15A driver, simulated to hit it's Xmax (4mm) at 60hz, which is at ~20% RMS (17.5V, instead of the Em Kappa 15A 60V). 60hz is a cutoff I regulary use in home. In home I would apply a lot of EQ to flatten it to this 60hz, so output will be limited even more in the higher ranges. I used 2pi for better comparison with the following simulations. Here is the same driver mounted in a sealed cabin with same volume as the LaScala sealed compartment, also Xmax limited at 60hz (19V input): There looks to be around 3-4dB hornloading in the 60-100hz range, and 6dB in the 100-500hz range.

I will not neglect them. It's more for driver simulation than for anything else so I'm good I think.

I used the word bassbin, but yes maybe mid-bassbin is more applicable. I do realize it's roll of. I have had 8 of them, and measured them multiple times. Now I want to repurpose a few of them, and want to see what kind of woofers I'd need. Also having the hornresp parameters is a good way to evaluate the amount of hornloading (both cornerloaded as in free space) I will get.

Anyone who can help me with the Hornresp parameters to model the La Scala bassbin? Any help is appreciated!

How much sensitivity would a compression driver gain or lose on a K402 horn? Looking at matching the woofers with the top and need to know this little bit of info. Thanks in advance!

I do have some ideas I'm gonna work out depending on some other projects (HiFi related), will try to right it out tonight or one of these days! Very busy, as I just started my medical apprenticeships, and I have to pull long 60-70h weeks, with masterthesis, studying and other time-consuming responsibilities in the weekend. Enjoying audio will probably be pushed to the far background, let alone contemplating and building new DIY speaker set ups..

We pulled of using just only 1 bassbin on each side, with an 18" below. 2 tophorns for better diffraction. It was by far a good setup, as I was having exams at the time, and wasnt able to be there during stagebuilding. We had to place them inside "towers" which meant suboptimal placement. Volumewise the single bassbin was able to keep up without a problem (we have a limit of 95db max, and the space wasnt too big). We might try again this year, but I'm gonna have even less time this time, so I will not be able to be there, which is a shame if I lend out my very expensive gear..

Hey Does anyone happen to know the polar control/coverage of the Lascala bassbins? Cant seem to find it anywhere.. Thanks in advance!

And listed price is only for horn and driver, or also including the LF bassbins?

by saying you are not separating the K942 combo you mean the LF and HF compartiments? Or horn and driver?

Only horn I see on the Klipsch 942 is the K402 itself (on a double woofer bassbin). Or is it a real 942 horn specifically?

I recently came across this horn, which was described as being a mid-horn from Klipsch, but I dont recognise it. Anybody any idea?

Just redid all the PEQ settings I had, and tried something different to measure the delays. I just used the built in "acoustical delay" function in the REW measurement tool. I redid the in/output settings in the processor so the High frequency driver got the left signal, and the Low frequency driver the right. That way it calculated the delays as it would between 2 speakers. Only took me a minute or so to do, without having to change any cables. It also extremely simple to do, and I dont think you can make any mistake interpreting it as it just says "you need to apply .... ms delay". When I applied the new delays I got a totally new speaker! Damn, the voices and intelligibility improved so much!