Dear all.
I am searching the best open baffle woofer with alnico.
It has to be fast. The Lii Audio W15 is to slow.
What is the best JBL woofer for open baffle? Maybe the K151?
Or do you know one another woofer? Maybe Gauss, Celestion, Tesla or Lomo Kinap?
I listen often Electronic Music..
I am thankful for every recommendation
regards Daniel
I am searching the best open baffle woofer with alnico.
It has to be fast. The Lii Audio W15 is to slow.
What is the best JBL woofer for open baffle? Maybe the K151?
Or do you know one another woofer? Maybe Gauss, Celestion, Tesla or Lomo Kinap?
I listen often Electronic Music..
I am thankful for every recommendation
regards Daniel
I suggest to read this paper: https://adireaudio.com/wp-content/uploads/2018/12/Adire-Audio-Woofer-Speed-by-Dan-Wiggins.pdf
Assuming you are going to use a crossover or equalizer to shape the frequency response, all woofers are equally fast.
A second point: measure the systems frequency response at your listening position. Room modes will screw it up and make the sound boomy and 'slow'. If you equalize the bass range to be flat at the listening position, the sound will be 'faster'.
Assuming you are going to use a crossover or equalizer to shape the frequency response, all woofers are equally fast.
A second point: measure the systems frequency response at your listening position. Room modes will screw it up and make the sound boomy and 'slow'. If you equalize the bass range to be flat at the listening position, the sound will be 'faster'.
Thank you. To look for the induction "Le" i dont know know before.
What is about the "qts"?
People say 0,6 - 0,7 is good but is this really important? My Baffle size will be 70cm wide and has 30cm wings.
If you are going to use a Digital Sound Processor (DSP), then the Qts is not that important. A high Qts driver might need less voltage in order to reach its excursion limit in an open baffle. That is no problem because amplifier power is cheap.
"Le" is something to look for but more in the context of harmonic distortion. Low distortion drivers have shorting rings, which most manufacturers state in the data sheet. Be cautious for cheap (without shorting rings) woofers with a high value for "Le", as these tend to have more inductance-related distortion. For more information, take a look at this poster: https://www.klippel.de/fileadmin/_migrated/content_uploads/Klippel_Nonlinearity_Poster.pdf
"Le" is something to look for but more in the context of harmonic distortion. Low distortion drivers have shorting rings, which most manufacturers state in the data sheet. Be cautious for cheap (without shorting rings) woofers with a high value for "Le", as these tend to have more inductance-related distortion. For more information, take a look at this poster: https://www.klippel.de/fileadmin/_migrated/content_uploads/Klippel_Nonlinearity_Poster.pdf
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Hello,
Coud you say on this illustation where do you find your loudspeaker slow please ?
Inductance also has a substantial effect on IMD (intermodulation distortion), which won't show up in any kind of distortion plot. The lower and more linear the inductance is, the better time domain performance it will have which will yield better IMD performance. This is interpreted as "transient response" to most people.
hi all i have listen to a JBL d140 R with qts 0,26. This was not perfect for open baffle.
Much better is: Cinemeccanica Berta and RFT 3702. I try to check also Lomo Kinap 2A11 18inch Alnico.
Much better is: Cinemeccanica Berta and RFT 3702. I try to check also Lomo Kinap 2A11 18inch Alnico.
Why Alnico?
Please define what you mean by "fast"? Dy definition, all woofers are "slow" at low frequencies.
Really? On what basis did you come to that conclusion?
I've done a simulation of this woofer on an open baffle (infinite baffle) in VituixCAD. The results are shown below. Here we see that the woofer is producing a very low F3 = 18.1Hz, with a small 1dB peak at its resonance frequency due to the Qts=0.79 being a bit greater than 0.71. Maybe that's why you call this woofer slow―because it reproduces lots of low frequency energy.
Adding a 5000µF capacitor in series with the woofer will serve to tame that peak, while at the same time lowering the F3 of the system. It also results in a boost in driver excursion, so its usefulness will depend on the exact application.
If you really do want "faster" bass response, then consider adding a passive 2nd-order high-pass filter to the driver. The simulated response of one design is shown below. The filter consists of an 810µF capacitor and a 10.6mH inductor. Now F3=30.4Hz, which should still suit electronic music. The driver displacement is now better controlled as well, which allows higher maximum SPLs to be obtained.
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Qts values in that range will not produce a peak in the passband response, while at the same time not attenuating the low-frequency response too greatly.