I am in the final stages of completing Troels Graveson's Ekta Grande design with the 5 degree tilted baffle and for the 2604 tweeter. I decided to enter Troels's crossover design into LEAP's Crossover program, which has response curves for all the drivers, and it does not yield a flat response, with a fairly regular increase from mid to tweeter. You can see this on the attached file. Just to clarify this is simply the crossover and drivers, no enclosure.
What I am wondering, is it reasonable for me to assume that the response will flatten once on the tilted baffle? I would like to trust the design, and think about tweaking the crossover once the drivers are installed and wired. What is my best strategy?
What I am wondering, is it reasonable for me to assume that the response will flatten once on the tilted baffle? I would like to trust the design, and think about tweaking the crossover once the drivers are installed and wired. What is my best strategy?
I don't have any experience hearing or working in troels designs, so strictly speaking I shouldn't comment.
However, there's a lot more to speaker design than just banging some driver data through LEAP.
If you're not building from a model you know works, I'd say it's a good idea not to second guess someone who works very hard to make exceptional speakers. The EKTA grande as presented on troels site looks like an excellent speaker.
Follow the kit instructions to the letter and see how they sound, crossover tweaks are ultimately a bit of a faff but not that hard to do. If you find the tweeter coming in hot, I'd be sure there's something else wrong in that sim though
However, there's a lot more to speaker design than just banging some driver data through LEAP.
If you're not building from a model you know works, I'd say it's a good idea not to second guess someone who works very hard to make exceptional speakers. The EKTA grande as presented on troels site looks like an excellent speaker.
Follow the kit instructions to the letter and see how they sound, crossover tweaks are ultimately a bit of a faff but not that hard to do. If you find the tweeter coming in hot, I'd be sure there's something else wrong in that sim though
Did you measure the drivers in the enclosure? Because the factory response files don't show the response in the cabinet, it's how the speakers react in the enclosure that counts.
My experience is that his designs are very good, only the crossover components he sells are often too expensive (cheaper ones do it as good) wich drives the price up unnecesairy, but his designs are very good. So i think or you work with the wrong data to start.
My experience is that his designs are very good, only the crossover components he sells are often too expensive (cheaper ones do it as good) wich drives the price up unnecesairy, but his designs are very good. So i think or you work with the wrong data to start.
The correct answer already has been given, but why did you think your simulation would give trustworthy results? Acoustics is 3D. Or 4D if you like. 2D simulation with false data will follow one rule: garbage in = garbage out.
Thank you everyone. Effective antidotes to my anxieties. Maybe I will postpone my obsessing until I can measure the response in the enclosure. I've done it once with another speaker I built at 1 meter, but didn't enjoy setting everything up for that. In any case, also enjoyed learning a new word: "faff". Great term that covers alot of things I do ... maybe even speaker building. 
Michael
Michael
I have built one of Troels designs and have a set of speakers he built. To my ears you can trust his design. Only changes I have made are tweeter attenuation resistors and to upgrade tweeter cap, keeping his design values.
Troels Ekta Grande website provides actual drivers-in-baffle SPL measurements which you can trace with a tool like FPGraphTracer to get FRD and ZMA files for a more accurate simulation.
NATURALLY... you will still want to measure your speaker for greater accuracy, plus in-room placement optimizations.
NATURALLY... your ears are the final test for crossover tuning and room placement/treatment
NATURALLY... you will still want to measure your speaker for greater accuracy, plus in-room placement optimizations.
NATURALLY... your ears are the final test for crossover tuning and room placement/treatment