You guys should check out Parker the basshead videos. He tests drivers for 5 minutes straight at their rated RMS.
Permanent outdoor stadium installations probably have the worst conditions for a driver. Other than that, PA can't touch CA when comes to playing conditions.
Permanent outdoor stadium installations probably have the worst conditions for a driver. Other than that, PA can't touch CA when comes to playing conditions.
@maxolini
Naah, that is some easy math that will lead you to failure.
As mentioned many times, it is not reasonable or real to hold such high power across the whole band. Once you throw 4000Watts at it, you get in more and more trouble. You CANNOT scale power without any penalty on a driver.
Now you are talking about peak, SPL in the response. That is not very usable. And then you are putting it in an enclosure that was calculated for some performance. With stronger driver, you will notice quite some losses and more compression.
Comparing all that, I believe two 18SW115 would about hold its own, and three pieces would already win. At four, it wouldn´t be even funny.
That is the expected situation you would have at hand. Still, indeed, having more motor force and less bins for moving is welcome. The driver still offers serious value. No doubt about that.
Naah, that is some easy math that will lead you to failure.
As mentioned many times, it is not reasonable or real to hold such high power across the whole band. Once you throw 4000Watts at it, you get in more and more trouble. You CANNOT scale power without any penalty on a driver.
Now you are talking about peak, SPL in the response. That is not very usable. And then you are putting it in an enclosure that was calculated for some performance. With stronger driver, you will notice quite some losses and more compression.
Comparing all that, I believe two 18SW115 would about hold its own, and three pieces would already win. At four, it wouldn´t be even funny.
That is the expected situation you would have at hand. Still, indeed, having more motor force and less bins for moving is welcome. The driver still offers serious value. No doubt about that.
The fi driver is rated about 3.5kw but at 2kw we hit Xmax, so you have 1.5kw as safe slack. Does that help ?
And sims assume sine waves at full power?
In real life that do not happen unless heavy EDM all day/nite 😀
And sims assume sine waves at full power?
In real life that do not happen unless heavy EDM all day/nite 😀
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What happens when you put a 34 mm xmax driver with a heavy/stiff suspension in a tapped horn shaped high compression resonator design for low excursion high spl ?
All kind of losses. Spending power on the suspension, choking the pathway with air, so you get these losses, then the speaker doesn´t behave as expected, so probably more losses and it all goes to hell while you are wondering why, because the simulation didn´t tell you. 🙂
It´s really not a good idea.
It´s really not a good idea.
Yeah ,the stuff that the sims don't tell you , I remember reading that some Art take written by himself about a cooked BC driver , it was an 18 can't remember the model but he did something that he don't suppose to do and the smell of burned lacquer and magic smoke I guess.
Yes, in development and testing stages, it is quite easy to do. I had my rodeos too. That's the experience paid by wallet. 😀
Why is this some sort of competition?
You both seem to be ignoring the reality of a PA driver - built to be enclosed in a rigid black box, transported by trucks and banged around by road crew, said black box set up outdoors for multi-day festivals in summer with cone potentially exposed directly to both heat and rain.
What really matters, where this discussion is going, is when the power hits the coils.
Ok, here is the scene. The taxi had the 12W7 in it for 7 yrs and the vehicle was retired after 1 million k personal effort. Ok, car parked outside in the sun all day, Falcon wagon, cabin temps in the high 40s. Turn on the ignition and the music resumes. Sometimes the 4 channel JL XD amp for the splits falters but turns on after a few seconds. Sub and the 1000/1 pumps away without skipping a beat
Even at those conditions, it's well within the subs operating range when the power hits the coils. I picked up the Subaru XV next to run with St. George Diamond Service and had new splits and amp fitted to that but the 25yr old sub is still going strong. The 1000/1 is acting up but it appears to be a common issue with age on those
The enclosure and driver are 2 different things. PA enclosures are built tough for touring. PA drivers are not built tough for CA environments.
That dry short non-boomy thup thup thup acoustic kick from the dub track and its electronic version here (ignore the overlaid synth bass notes on the kick where that happens)
So it's the loading from the car body that sends it far? My home sub is in a corner of a 3m x 6m room. Even at very low volumes, this kick travels a long way at night and through neighbours walls. I presume a similar horn effect is happening here too?
So it's the loading from the car body that sends it far? My home sub is in a corner of a 3m x 6m room. Even at very low volumes, this kick travels a long way at night and through neighbours walls. I presume a similar horn effect is happening here too?
The difference between 16x 15" vs 4x18" is not the spl at 1m but spl at 25m due to different directivity of these stacks.
i think it's hilarious that you got a bunch of people to debate this....this is an unsubstantiated claim that you can't prove is true....
We are considerate and inclusive bunch of bastards. We will follow you to whatever dumb chamber of accoustical nonsense as long as it is about speakers. Because, it is good alternative to the other things we might be doing instead. 🫣
The gigantic tapped horn from hell is really pushing the limits .
( nearly an 8:1 compression ratio ) 😱
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what driver are those Booger,
hey... does the compression ratio works linear ?
i mean... if you have a Horn with a 8:1 compression ratio , but you have 8 drivers...
each driver only get a 1:1 compression ratio ?
i mean.. you divide all the force between all 8 of them ?
if the last is true... then you can design high compression ratio horns and just add as many drivers as you need
to distribute the cone shredding force !
actually i nicknamed compression as Cs
Cs= Cone Shredding
hey... does the compression ratio works linear ?
i mean... if you have a Horn with a 8:1 compression ratio , but you have 8 drivers...
each driver only get a 1:1 compression ratio ?
i mean.. you divide all the force between all 8 of them ?
if the last is true... then you can design high compression ratio horns and just add as many drivers as you need
to distribute the cone shredding force !
actually i nicknamed compression as Cs
Cs= Cone Shredding
@maxolini
Check out the simulstion. It’s using the dats v3 info for TS parameters. The drivers are custom made by ‘Jeff Vue’ .
I noticed in the actual measurement (small signal ) the frequency response shape is identical to the simulation and downsizing of the qw resonator to a single driver. Not the upscaled simulations depiction of 8 drivers combined . (It just a huge resonance at 1/4 and 3/4 ??). The simulation also requires the manipulation of ‘Le’ to create that shape as well
Check out the simulstion. It’s using the dats v3 info for TS parameters. The drivers are custom made by ‘Jeff Vue’ .
I noticed in the actual measurement (small signal ) the frequency response shape is identical to the simulation and downsizing of the qw resonator to a single driver. Not the upscaled simulations depiction of 8 drivers combined . (It just a huge resonance at 1/4 and 3/4 ??). The simulation also requires the manipulation of ‘Le’ to create that shape as well
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So in 10th grader English
are those numbers real or is just some brain jerkoff 😀
are those numbers real or is just some brain jerkoff 😀