Also notice that bjorno is finding out the maximum input voltage (watts) for a given design based on the 13mm xmax for the Infinity 1260w. Your designs are only showing 1 watt inputs. The design might be great at 1 watt, but can it handle 100, 200 watts etc??? The speaker is spec'ing 300 watts @ 13mm.
Hi
I think it wil so loud that I never hit max in home circumstances.
I see that A TQWT with two wsp26s visatons what I have here also made it necessary to do isobaric otherwise the box get much big.
The fase is wild, but crossover coil do this, every lowpass is wild here.
It is just a test, I see that speakers need a low vas, low qts when passive crossover, the mtx has a big peak around the fall off point 20 Hz.
On the mouth L34 is just 0.10, looks like speaker come outside the mouth.
Wel I have done now merged photo,s, looks better. And I think now I have remove again some green parts behind my ears, today I did get mouser parts
for the allfet amps, so I have work to do.
thanks all.
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I have search the Bjorn advise about the infinity woofer for a T_TQWT.
I see the respons go higher when higher frequenty do I have to input
and adjust slider in hornresp so I get a respons like that? so when it is
filled with damping the respons flatten out?
Now search some examples of how to fold it, more then double fold or
it get to high like 3 or 4 fold.
thanks bjorn, I have now discover how to see the pictures clear, was the reason I did not try your advise because I did now see the input (to small and unclear), now I can after see that picture can be blow up.
Bjorn the Bl of 17.96 what was wrong came because of maybe the wrong Le input, now it do good when I fill in TS, thanks for seeing that.
regards
kees
I see the respons go higher when higher frequenty do I have to input
and adjust slider in hornresp so I get a respons like that? so when it is
filled with damping the respons flatten out?
Now search some examples of how to fold it, more then double fold or
it get to high like 3 or 4 fold.
thanks bjorn, I have now discover how to see the pictures clear, was the reason I did not try your advise because I did now see the input (to small and unclear), now I can after see that picture can be blow up.
Bjorn the Bl of 17.96 what was wrong came because of maybe the wrong Le input, now it do good when I fill in TS, thanks for seeing that.
regards
kees
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Thanks only I did see on bjorn also T-TQWT where L34 is just 0.10 cm? the speaker center in hornresp get out of the mouth or is that the speaker just at the bottom and that 0.10 thickness of wood opening.
Normal I use for L34 not smaller than half of speaker average so I was curieus how Bjorn do this see schematic hornresp in previous post.
But first amps, I have parts received, so I can go PCB. monday further with the box, I go test the visatons, these high vas ones need isobaric T-TQWT.
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Yes I think you are right, so S4 is only thickness of wood long.
I have dome some tryouts with akabak, looks more complicated then it really is, but here I go.
in picture hornresp give a big very small peak/canceling? this even happens when go from 2.0 to 1.0x Pi akabak don,t show nothing except a tiny tiny thing there.
Also in hornresp I get a bit peak on fall off point like you get when the box gets to small en the qts to high, in hornresp case if T-TQWT S1 S2 get bigger I get bigger peak, buttt in akabak it is not the case or just a little.
I saw that I need to include the resistance and crossover, ande maybe here it is wrong because if I give hornresp a RG of 1.2 ohms for coil resistance as test in akabak it stay 0.10 0hms. Maybe the virtual windows xp I do is the fault of thism what I dont think.
On photo is the same input for akabak and hornresp but a big difference as you see, afcourse I need more learning about akabak but it is promising, a pity that it is not 64 bit, compiling it again for that is not that difficult..
this is example what to ad or crossover including, example.
Resistor 'Req'
Node=1=2
R=5.1ohm
Coil 'Lm'
Node=2=3
L=6.957H
Rs=0.294ohm
Capacitor 'Ce'
Node=2=0
C=61.51uF
Capacitor 'Cm'
Node=3=0
C=2.972mF
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Still Bjorno, can you explane me that if I need bandwith I can best use two woofers in a T-TQWT.
But, easy horn exel sheet do also calculate and I can use a smaller bandwith with one woofer, and it helps with low passing after 80 hz (it has no peak above 100 hz) this peak will afcourse be limit a lot with damping. The infinity is a deep woofer 16.5 cm and so I need a bigger throat or two woofers in yours but then I get not the 3 cm clearance, just speaker is terrible deep,
with one like on photo (example) then I have clearance enough.
I think it is just what someone want, I do like the one woofer version, I see there is so much possiblilitys to make a sub, Nice and interesting that speaker thingies.
This is just a test example, visatons has high vas of 220, so isobaric is the way if used, but I leave them in the dipoles.
have a nice weekend from a very cold holland
But, easy horn exel sheet do also calculate and I can use a smaller bandwith with one woofer, and it helps with low passing after 80 hz (it has no peak above 100 hz) this peak will afcourse be limit a lot with damping. The infinity is a deep woofer 16.5 cm and so I need a bigger throat or two woofers in yours but then I get not the 3 cm clearance, just speaker is terrible deep,
with one like on photo (example) then I have clearance enough.
I think it is just what someone want, I do like the one woofer version, I see there is so much possiblilitys to make a sub, Nice and interesting that speaker thingies.
This is just a test example, visatons has high vas of 220, so isobaric is the way if used, but I leave them in the dipoles.
have a nice weekend from a very cold holland
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Hi kees52,
Post #3991: "...so S4 is only thickness of wood long..."
I see L34 (not S4) more like the middle of the duct to S4 (mouth area), or, maybe even from the acoustic center of the cone to S4?
As always, design - build - measure - design again......
Regards,
Building yes, but first I need to have enough info, learning, I do amps ehh, and speakers are new for me.
I did mean S4 the opening in the box, L34 is the length of the duct.
I see you have a box like I did simulate last, not the speaker in 1/4 of length pipe like Bjorno does. when one speaker the way you let see in the pdf is the way, but smaller bandwith, this is not a problem because the box helps with low passing. (see simulations in previeus posts).
Thanks for your pdf, It give me again more ideas how to do it. I include two pdf so you can see the difference with Bjorno who has nice T-TQWT with double woofers and extended bandwith.
have a nice sunday and I hope less cold then here. (minus 1)
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Hi kees52,
Yes, these are two more pdfs of drawings of mine. The maelstrom was some blue skying, that happened to match bjorno's suggestion(s) (the driver does not fit if I remember correctly), and the TheBaronGroog drawing was to match a design by bjorno as a fold example.
Three of my favorite threads for T-TQWTs are permo's: http://www.diyaudio.com/forums/subw...band-w8q-1071f-8-x-12-box-reccomendation.html ,
ODougbo's: http://www.diyaudio.com/forums/subwoofers/203345-isobaric-less-then-20-a.html (this one starts with some ponderings on isobaric designs, and goes on to NEO Dan's T-TQWT design, and on....), and this one:
http://www.diyaudio.com/forums/subw...eating-subwoofer-box-s-56-cuft-available.html (apparently never finished).
Lots of information in these threads. One of the most important aspects of this style of enclosure is the stuffing that is used to smoothen the frequency response. Again, bjorno has done a lot of work on this subject, and he is the person to ask for information.
As most of this has little to do with this thread, I wish a moderator would set up a unique thread for you, and put all the different questions/answers into one place, but it's probably a little too late for that.
As to the weather: warm and windy (stormy).
Regards,
Yes, these are two more pdfs of drawings of mine. The maelstrom was some blue skying, that happened to match bjorno's suggestion(s) (the driver does not fit if I remember correctly), and the TheBaronGroog drawing was to match a design by bjorno as a fold example.
Three of my favorite threads for T-TQWTs are permo's: http://www.diyaudio.com/forums/subw...band-w8q-1071f-8-x-12-box-reccomendation.html ,
ODougbo's: http://www.diyaudio.com/forums/subwoofers/203345-isobaric-less-then-20-a.html (this one starts with some ponderings on isobaric designs, and goes on to NEO Dan's T-TQWT design, and on....), and this one:
http://www.diyaudio.com/forums/subw...eating-subwoofer-box-s-56-cuft-available.html (apparently never finished).
Lots of information in these threads. One of the most important aspects of this style of enclosure is the stuffing that is used to smoothen the frequency response. Again, bjorno has done a lot of work on this subject, and he is the person to ask for information.
As most of this has little to do with this thread, I wish a moderator would set up a unique thread for you, and put all the different questions/answers into one place, but it's probably a little too late for that.
As to the weather: warm and windy (stormy).
Regards,
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Hi kees52,
Post #3991: "...so S4 is only thickness of wood long..."
I see L34 (not S4) more like the middle of the duct to S4 (mouth area), or, maybe even from the acoustic center of the cone to S4?
As always, design - build - measure - design again.....
Regards,
In Bjorno's case, I would think he's using the top L34. If the duct was at bottom of that panel like a typical T-TQWT, then L34 would equal L12.
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Better wether then here tb46 here now minus 3, mucho to cold for spring, wether in the world get spooky, maybe because of tapping energy from sun and wind..
T_TQWT is in fact a kind of tapped horn, negative flair of straight.
The L34 I think is to middle of speaker and then to S4 as one length, S4 is short like bjorno did and is only thickness of wood and the width and height is S4.
I have now play a day with akabak in a xp virtual environment, and it looks more difficult then it is only documentation is small.
I can do make a low pass with coils and caps, but also a low pass within akabak what I think is better, analog 24 dB octave wil not remove the peak in a tapped horn (I do think a electronic do not also), here maybe a need for damping in the throat.
from now on, only tapped horns here, I want still made one, and the T-TQWT
For the question left, can someone looks to the script, I do miss something like the amplifier impedance, with filter the graph is messing up a lot and I like if akabak kan simulate damping material, the rest I already now now, a learning sunday..
thanks all
T_TQWT is in fact a kind of tapped horn, negative flair of straight.
The L34 I think is to middle of speaker and then to S4 as one length, S4 is short like bjorno did and is only thickness of wood and the width and height is S4.
I have now play a day with akabak in a xp virtual environment, and it looks more difficult then it is only documentation is small.
I can do make a low pass with coils and caps, but also a low pass within akabak what I think is better, analog 24 dB octave wil not remove the peak in a tapped horn (I do think a electronic do not also), here maybe a need for damping in the throat.
from now on, only tapped horns here, I want still made one, and the T-TQWT
For the question left, can someone looks to the script, I do miss something like the amplifier impedance, with filter the graph is messing up a lot and I like if akabak kan simulate damping material, the rest I already now now, a learning sunday..
thanks all
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Post #3997
Hi kees52,
"...S4 is short like bjorno did and is only thickness of wood and the width and height is S4...."
In Hornresp all the S values are cross-sectional areas, in a 3-section horn S4 is the mouth area (no thickness).
"...play a day with akabak in a xp virtual environment..."
You can export an AkAbakScript from Hornresp (as a starting point) go: File/Export/AkAbak Script (will not handle Par flare).
Regards,
Hi kees52,
"...S4 is short like bjorno did and is only thickness of wood and the width and height is S4...."
In Hornresp all the S values are cross-sectional areas, in a 3-section horn S4 is the mouth area (no thickness).
"...play a day with akabak in a xp virtual environment..."
You can export an AkAbakScript from Hornresp (as a starting point) go: File/Export/AkAbak Script (will not handle Par flare).
Regards,
Yes I did that with hornresp, and did set coils and caps myself in the script, I have rename the speaker Node 1 to Node 2 for this because it needs serial coils and parallel caps. I have xp installed yesterday in a virtual environment.
akabak is not difficult but i can,t figure out what a notch filter for the 65 hertz tapped horn peak is to implemented in akabak maybe he can not do that.
nice software it is a pity that it is not supported anymore.