Just play with hornresp, i am better in these then akabak.
a pity hornresp has no tractrix, but with bass the exp is oke for testing.
play with the wizart and look at the thickness of the wood, in my case it was 1.8 cm I have use 12 cm wide port devide to 2 in hornresp to get total surface but it is not critical, go smaller als works until to much compression occurs, some damping on the wood under the cone can help also.
wtih two woofers I get a dip, I can flatten it but woofer get to close to mouth giving problems. but the rising peak at 300 hz is not a problem, easy to flatten with a 6 dB lowpass filter and together with the natural low pass of the port we get nice respons. see pictures.
beware, the phillips are quite high in qts so the coil act different with power qts types. (better)
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It should be - as we found that out here in this Trynergy thread. Byrtt has bought some COTS 2in throat WG's and will test out the 10F as soon as he makes some throat adapters.
I don't see why it shouldn't. The big lesson learned so far is that with the proper well-damped cone driver and a smooth throat transition, it is possible to get a cone driver to push past the typical 4.5k to 9k cutoff dip that typically plagues full range drivers in horns. Both Bushmeister and myself are able to get the SB65 to go up to at least 12k smoothly. That gets you a full range linear phase telephone band, and properly crossed to a woofer below 500Hz to 600Hz, makes a horn FAST that sounds fantastic.
This you need to ask hornresp, I have fill in the ports as in your script 12 cm to cm2, and the thickness of the wood the woofers is on. And filtering because without it do as akabak, give a peak on 300 Hz, but this can be changed with moving the woofer back and forth in the horn, however when get a good respons the woofers are to close to the mouth, so I move back, happely a single coil do flatten it, like I did see in a tapped horn what I did sim.
You now get the woofer more close to the throat there is some loading of the woofer giving more spl, but it has to be play with.
Do now I am green behind my ears with speakers, because I do just play with it a year or two.
Do you devide the ports for the woofers? hornresp do use one port in sim of all the ports together with 2 woofers so it are small ports 2 each woofer.
regards.
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I am not good at HR so not the right person to ask. The second one looks more like what I expect with a bandpass woofer injection into a horn. The peak is there and the sharp cutoff dip.
X your right, it looks like your script, however I can flatten it nicely out with a passive filter in hornresp, see first picture with it, even a single coil does the job, it is not all standard but hee we need new look at this stuff..
The picture you mention is pure without filtering, but I can flatten it by moving the speaker towards the mouth, but it is not complete possible because it it is to close ad the end of the horn, you now what I mean. Also the specs of the speaker play a role, with a low qts I think it can more towards the throat, hornload the speaker also a little, maybe extra reason of the dip also.
I am better with hornresp I did make the tapped horn with it and the dipoles.
See pictures with the only a coil making respons flat, it change the qts..
some read stuff I found about horns.
http://d-nb.info/982293429/34
regards
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Pictures and details the two cheap 2" horns i bought that will give a try for 10F and TC9 or SB65, unfortunate am busy job and life so there wil go some days before have time and make first adapter and measurements. Admit more optimistic bigger SEOS and JMLC horn types (- Horns by Auto-Tech) will work better for hifi but they very expensive, so give these cheap ones a try first.
Posts:
483 http://www.diyaudio.com/forums/mult...lti-way-point-source-horn-49.html#post4590004
555 http://www.diyaudio.com/forums/mult...lti-way-point-source-horn-56.html#post4593194
608 http://www.diyaudio.com/forums/mult...lti-way-point-source-horn-61.html#post4595135
Thanks BYRTT,
Slow is good... I am totally snailed...
My foam horn is just started, 10F are yet on their bag... I just follow the threads these days !
As far I can get the 10F > 500 Hz to have around 100 dB/2.83V at the mouth of an horn it will be good enough !
Slow is good... I am totally snailed...
My foam horn is just started, 10F are yet on their bag... I just follow the threads these days !
As far I can get the 10F > 500 Hz to have around 100 dB/2.83V at the mouth of an horn it will be good enough !
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One of my visatons is little burned thanks to windows 10.
Everytime I start the pc the volume go to max, just a moment of awareness and bang full power, with the mike close to it, feedback do the rest.
However it smells burnd, it stil measure right, like the induction.
regards
Everytime I start the pc the volume go to max, just a moment of awareness and bang full power, with the mike close to it, feedback do the rest.
However it smells burnd, it stil measure right, like the induction.
regards
Hi K,
Does it make the same if you choose by default an other soft player (than the W10 one) for reading the multimedia files (movies and audio files) : like vlc for instance ? Or does it the same with all multimédia softs ?
Does it make the same if you choose by default an other soft player (than the W10 one) for reading the multimedia files (movies and audio files) : like vlc for instance ? Or does it the same with all multimédia softs ?
Hi All
I have now did tests with faseplugs and the respons without filters is very good, and it go very loud, now it extens from 1.2 Khz to above 3.5 Khz making a K-tube easy to implement, but need a compression driver for I think, it is dependid of the bass units. the first holmresp plot has fase and distortion included, you see it is -64dB down.
The bass units ware cheap, 35 euro for two, sounds pretty good in free air, so I go measure them.
See also the raw sim from holmimpuls, as you also see is the 12,dB lowpass do improve the fase, possible because above 3.5 Khz is down now, and interact very little.
Looks like 18 or 24 dB filters do better with horns, and the little bump around 300 hz is because of the small box behind the visaton, but not a problem or i make the box a little bigger.
regards
kees
I have now did tests with faseplugs and the respons without filters is very good, and it go very loud, now it extens from 1.2 Khz to above 3.5 Khz making a K-tube easy to implement, but need a compression driver for I think, it is dependid of the bass units. the first holmresp plot has fase and distortion included, you see it is -64dB down.
The bass units ware cheap, 35 euro for two, sounds pretty good in free air, so I go measure them.
See also the raw sim from holmimpuls, as you also see is the 12,dB lowpass do improve the fase, possible because above 3.5 Khz is down now, and interact very little.
Looks like 18 or 24 dB filters do better with horns, and the little bump around 300 hz is because of the small box behind the visaton, but not a problem or i make the box a little bigger.
regards
kees
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No there no filters, straight on the amp ouput, I have now making a more narrow split between speaker and throat, and it go less far, so motor of speaker is truly a factor here, I can go to 4 Khz, that make K-tube more easy.
The new plug now do go to 2.8 Khz, it is 1 Khz less far with a more narrow split around the plug,
regards
Kees,
Regarding woofer placement.
Do you have a picture with Hornresp input parameters? I don't know how to simulate those entry points.
Also i am confused about this: the woofer entry points should be less than 1/4 highest freq from the throat? Or less than 1/4 highest freq. from each other woofer entry point?
Thanks!
Regarding woofer placement.
Do you have a picture with Hornresp input parameters? I don't know how to simulate those entry points.
Also i am confused about this: the woofer entry points should be less than 1/4 highest freq from the throat? Or less than 1/4 highest freq. from each other woofer entry point?
Thanks!
If you are going DSP, the placement of woofer holes is pretty flexible as you don't have to get time alignment perfect for passive XO. You will get more bass horn gain the deeper back you put the holes - but at the expense of it messing up the HF polars. Placing close to mouth preserves HF polars and you only get native sensitivity of woofers with no horn gain. The whole 1/4wave requirement is not needed like on a flat baffle to get good integration because the horn provides the integration for the virtual point source. For me, the placement of the woofer holes is really a practical matter of where I could get the holes to line up with woofer cone and not be too close in to prevent it from damaging the polar reaponse on the mid/tweeter.
I have make smaller split between faseplug and wall, giving not as high as I did get first, maybe because the compression is higher the speaker has to weak motor..
arcgotic
Here are the sims. But as X say, I go analog so need more work to get there, with possible also a K-tube. get the woofer closer to throat do give horn loading but it get not as low I want without loose it again.
The nice plot is with a 12 dB crossover you not see.
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