Nice work. I'm looking at building a 2 * 15 paraflex type c cram and comparing against 2 of these roar15s together. Same drivers, but 2 in the single box. The 2*15 response looks more or less flat and drops a bit lower (35hz tuning). Basically I'm hoping to get the same if not more output as 2 roars but from what is only a slightly bigger box than a single roar15 (1016 x 920 for the cram, versus 820 x 820 for the roar). We shall see, will keep you posted.
Wow, he ran his Roar15 with a 500hz low pass filter. I told y'all folks have been running TH's without low pass filters and they were still sounding good to the designers.
https://www.martinsson.cc/blog/index.php?m=12&y=19&d=01&entry=entry191201-183913
https://www.martinsson.cc/blog/index.php?m=12&y=19&d=01&entry=entry191201-183913
Yes, indeed there are.. There isnt much between the type O and type C dual 15s, both 35hz tuned boxes. I think I prefer the look of the type C hence going for that. Also, I've already got 12 15" drivers to be used. If they are any good I'd look at building at least 6 of them before outdoor events next summer.
The type ‘O’ has the brief ‘8th order’ section that both paths dump into that “might’ deepen/flatten out the response a bit as compared to some of the large high tuned (obnoxious?) resonator type ‘C’ stuff?
How? There’s a gigantic cancelation notch centered on the frequency that fits between the front and rear of the driver (~50cm(172.8hz)), which is 4x the 1/4 wavelength of the path of the upstream TL section (iOw, 360 degrees of ‘pressure phase’). You can’t ’fix’ that or amplify it out of existence ?
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Wow, he used a LP filter for a low level test.
Nothing in Martinsson's blog that says he runs the Roars without low pass filters or they sound good above the null frequencies.
What means "the roar12 is not suited for indoor duty"
Tooooo powerful??
It's a 12 can't be 150dB SPL
Is not an HT sub either so the Fb is not 20hz
But the post says it can reach 30hz on a corner. It is more like a 50Hz F3 box
If you are stoned maybe ? 🤪
But read this
See post#3
Tooooo powerful??
It's a 12 can't be 150dB SPL
Is not an HT sub either so the Fb is not 20hz
But the post says it can reach 30hz on a corner. It is more like a 50Hz F3 box
If you are stoned maybe ? 🤪
But read this
See post#3
The low frequency resonator is a long skinny (overdamped) pipe . While the second resonator is ferocious. If you don’t have a very potent motorforce to drive/excite the upstream sections high compression TL the Fb suffers greatly and your left with the Big Bang of the higher tuned section ?
It’s very intersting/exciting regardless
It’s very intersting/exciting regardless
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I don't know. The measured response graph I've seen of the type c 2 * 15 looked very flat and with no peak around 90hz which the roars have. I guess I'll find out with a prototype. Even if the overall output is not much different but the lower end extends further and with a few db more output < 50hz region (which is kind of what I expect / hope will happen), I'll go with them.
I am, but also with the system going in at outdoor events with between 500 to 1000 people per stage, it does need to have plenty of bass. It's also nice to be able to run it at like 50% power and still achieve a really good level. I hate ragging my kit for long periods.
Running a 500hz low pass filter on a bandpass SUBwoofer is about as equivalent as running no low pass filter as you can get.
I never said how long they ran their TH's without a low pass filter. I said they said their designs sounded good to them when they did it.
Right! He said it shook everything in the crib and it would annoy the neighbors...my kind of bass 😉
Exactly, typical audiophile bass bin.
That tap location is not possible unless you are going to actually build the absurd enclosure below.
maybe you should observe what the driver position actually does in a resonator and at what 1/4 wavelegth frequency before drawing your random inaccurate pics that don’t ‘explain’ or present anything relevant to the bandwidth or function
So you wanna hear 240 hz and 300 something periodically ringing when a female vocal stirs it up? How is it you don’t hear the ~90hz resonace in your box with the XO set at 80 hz? To me that’s either impossible, or your room is full of crazy sounds that make it all just funky and unidentifiable?
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That's not a random pic. That's a basic double fold version of YOUR model. You cannot place your DRIVER's tap point where there is an abrupt transition in CSA. What YOU need to do is either model more segments or move your tap point.
That's where we could benefit in having a 5th segment in HR.
That's where we could benefit in having a 5th segment in HR.