EXACTLY!
I sim'd at 149v with a small amount of EQ to smooth.
And yes I still have and use the SS15s. Same as before 6x6 cardioid end fire setup.
Just did an all 80's party on the 7th. "Purple Reign" in honor of Princes BD. It was a bit LOUD. 😈 Like when Dead Or Alive - Spin me Right Round was played. Some serious 909 action there. As a note - a Go Gos song was played and I thought something happened as no bass. No input being shown on amps so I powered them down and heard the sound change. Powered on and it was there just basically non existent. ( Cardioid at work) It was a wave file being played so it was recorded that way. Freaked me right out.
I have 2 Krakens and amp to push 4 of them with headroom.
Just need to upscale the design. No time as of yet. (if someone wants to do that with the pervious attached HR file...)
I sim'd at 149v with a small amount of EQ to smooth.
And yes I still have and use the SS15s. Same as before 6x6 cardioid end fire setup.
Just did an all 80's party on the 7th. "Purple Reign" in honor of Princes BD. It was a bit LOUD. 😈 Like when Dead Or Alive - Spin me Right Round was played. Some serious 909 action there. As a note - a Go Gos song was played and I thought something happened as no bass. No input being shown on amps so I powered them down and heard the sound change. Powered on and it was there just basically non existent. ( Cardioid at work) It was a wave file being played so it was recorded that way. Freaked me right out.
I have 2 Krakens and amp to push 4 of them with headroom.
Just need to upscale the design. No time as of yet. (if someone wants to do that with the pervious attached HR file...)
I'm glad you are back Flip, I followed the SS thread and your famous dozen!!
4 21 loaded keystones will rock !!
What amp and DSP you have?
4 21 loaded keystones will rock !!
What amp and DSP you have?
Flip,
The impedance minima at 31 Hz is 3.94 ohms, over 5600 watts into a 2000 watt rated driver is a bit optimistic, especially with nearly a 4/1 compression ratio.
Did sound for several of Prince's birthday parties back in the 1980's, they generally were a bit loud by the time he took the stage 😉.
Expect to go through quite a few mouth opening dimensions, shapes and locations before finding one that works similar to the sim response.
Looking forward to seeing how it works out!
Art
BP1Fanatic - 808 for that fat sustained and decay boom. 909 for the sharp attack kick bass that hits you in the chest.
weltersys - roger on that. Have regular 3/4 ply for the test building. Will also re re read the thread again as I recall you mentioning the testing of different ones.
I'm a good 6 DB down from what maxolini posted above at 31 hz. Also not looking to push them to that extreme. Input power is my biggest limiting factor.
Really surprised that there isn't a Hornresp importer for Sketchup or other CAD app.
Brian Steele boxplans (excell spreadsheets ) are awesome to convert your hr screens in to the actual cut sheets, ask him if he can make the keystone spreadsheet.
Lordsansui parametric cad files are also great, based on freecad and his own scripts you can calculate the dimensions of the actual box
Lordsansui parametric cad files are also great, based on freecad and his own scripts you can calculate the dimensions of the actual box
Brian's response to a request for a Keystone exit:
So in 2025 is there any acoustic analysis/sim software that take advantage of AI so to simulate all possible openings in the mouth panel of the keystone?
that would be awesome, it is hard to believe that in the age of massive AI trough many platforms there is no AI implementation in the speaker cabinet design arena, or if there is ... looks like it is proprietary software to big label cabinet manufacturers.
in the meantime looks like brute force approach is the only way
I guess I could take a stab at it. The key thing would be to see if it's possible to "approximate" the layout by comparing the sim'd response to a measured response curve, finding the closest fit, and then building that into the BOXPLAN calculations. I've got a long weekend coming up, so I could take a look at it.Brian's response to a request for a Keystone exit:
I think the complexity of a Keystone mouth shape could be simulated in AKABAK using the Boundary Element Method (BEM) and Lumped Element Method (LEM).
Probably require ~300 lines of script.
So far, no one seems to have tried that yet, so AI wouldn't have much to go on.