I don't think so Art.
Hey, i don't mean to / want to, get into a semantic, or a which first -- chicken-egg, debate.
So I'm just going to let my views expire without much further comment.
I strongly believe there is an absolute linkage between the time domain impulse and frequency domain mag and phase.
So I prefer to see them as an identity, seen from different viewpoints..
You do realize I hope, that the sine bursts I posted are an example of the 'long serving physics in the wider range'.
And very applicable in electronics. I often analyze electrical xovers with them.
You brought it on, and the meaning of words are required to be agreed upon for any meaningful debate.
There is a linkage, but the frequency response measurement comes first, long before the FFT "egg" that can parse the time domain from a frequency response.
Frequency is the number of occurrences of a repeating event per unit of time.
A frequency sweep is a change of frequency over a period of time.
The sweep typically progresses in either a linear or logarithmic progression.
A mechanical chart recorder as used to measure some of the first loudspeakers ~100 years ago can store that progressive information as frequency response, still as valid and accurate today as it was in 1979:
That chart is an accurate recording of the frequency response of that horn bass speaker, which had "excellent transient response" (it could "kick like a mule"), but you would have to take my word for it, since no FFT was available in 1979 for under $48,000 (in today's equivalant $$) to transform it's logarithmically swept sine wave into an impulse response.
Back to your chicken and egg- understand the frequency response is measured first, REW does not use an impulsive signal to measure an impulse response, it uses FFT (fast as your computer allows..) to create an "impulse response", without the requirement of using a difficult to measure impulsive signal.
If it were not for fast (and cheap) computer computation, we wouldn't be having the debate between the very distinct difference between impulse and frequency response 😉 .
Art
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You pulled the guns out lol, I'll never say anything bad about Ac/Dc 😁
I know that FR is a huge part of having the best sounding kick because I had to teach myself, being that one of my goals as sound engineer, was to have the kick contain the lf that I wanted, but also have the snap. A balanced signal is apart of the recipe.
My perspective is, this "kick" thing is just a matter accuracy. We aren't Adding anything we are simply allowing whats already there, to be as its meant.
FR, GD, Compression, Thd, all need to be optimal. The room/listener situation needs to comply as well. The GD/Decay of the rooms response can be very high, and does not serve to improving accuracy.
I do believe the compression aspect is critical to achieving a visceral performance. Not scientific, but the times that I have experienced "kick" has consistently been via pro speakers. I expect that certain autosound systems do it, too, as they often go over the top in terms of system power.
Absolutely - the dynamic headroom requirement is huge. The coaxial compression drivers alone in my PA run amps of 350W for the HF and 750W for the midrange coils. LF is equally over-amped.
🙂
This one is gut/intestinal as well as chest 😮
I think my tapped horns are doing more on this track for example than say Thunderstruck..
My 30h+ playlist has quite a few chest kick/punch tracks. You can port it to your fav streaming service using tunemymusic etc.
A FR domain signal. A time domain would be an actual impulse. A short, sharp "jolt". Like e.g. a sinc half a sinus.
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Interesting topic
I recently make a Diy sealed sub with the Scan-Speak Revelator 32W4878T00 and Hypex FA501 amp tuned@22hz-6db.
The Peerless stw-350 was around the same price, but for music the Revelator looks better for my use.
For myself i think indeed the Revelator can start and stop faster with more detail then a bigger heavy cone and voice coil.
Happy with the Diy sub, for movies its also great in medium size rooms.
I recently make a Diy sealed sub with the Scan-Speak Revelator 32W4878T00 and Hypex FA501 amp tuned@22hz-6db.
The Peerless stw-350 was around the same price, but for music the Revelator looks better for my use.
For myself i think indeed the Revelator can start and stop faster with more detail then a bigger heavy cone and voice coil.
Happy with the Diy sub, for movies its also great in medium size rooms.
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The Sigberg 10D use 2 of these drivers the reviews of this sub are very good, look on audioholics website.
But the 10D is a sealed sub what fit the driver maybe better.
Use 4 of these 12 inch discovery drivers in 2 sealed dual opposed subs with Hypex FA502/FA252 amps tuned @22hz-6db and 15hz-10db
The midbase @50hz is 120db 2-meter Ground Plane for one subwoofer, they can slam extreme hard and 10hz flat inroom.
The sigberg 10D has 116db in midbase thats also amazing, a good 15 inch subwoofer has almost not that level of output.
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Yes, Below track, first 1 minute will really excite it. My go to track for testing that particular frequency range 80-150hz. I can`t bear this track in my untreated rooms.
Below is the playlist with similar tracks(progressive electronic).
@MrKlinky the whole spectrum between 15 and 100hz on more or less the same time is good for me.
I doubt a big heavy cone driver can do that, the peerless and scanspeak are compleet diferent drivers.
The front subwoofer in the beolab90 speaker is this scan speak revelator driver.
There are also 10 inch discovery subwoofers on the sides, 18 scan speak drivers total.
I hope for a speaker at this price point they use good drivers
I doubt a big heavy cone driver can do that, the peerless and scanspeak are compleet diferent drivers.
The front subwoofer in the beolab90 speaker is this scan speak revelator driver.
There are also 10 inch discovery subwoofers on the sides, 18 scan speak drivers total.
I hope for a speaker at this price point they use good drivers
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