I plan on doubling these dimensions and putting 2 woofers side by side in the back of my truck. I removed the 6th order wall i currently had that i built using term lab pro and replacing with this. I assume that will work because the boxplan doesnt allow for 2 woofers side by side it only shows one in front of the other.
Just to clarify, as far as Hornresp is concerned it is possible to get effectively identical performances out of the PH1 and TH models by suitably dimensioning the component values in each system. For the test example below, Attachment 1 shows the PH1 system model, Attachment 2 shows the TH system model, Attachment 3 shows the PH1 power response and Attachment 4 shows the TH power response.
Attachments
Those are some fairly significant differences.
Please post up the contents of BOXPLAN.TXT export files from the workbook. The contents should look something like this:
ID=BOXPLAN
Ang=2.0 x Pi
Eg=56
Rg=0.1
Fta=0
S1=940
S2=940
Par=24.86
F12=0
S2S=940
S3=940
Par=184.6
F23=0
S3S=1363
S4=1363
Par=11.9
F34=0
S4S=1363
S5=1363
Par=13.8
F45=0
Sd=1210
Bl=25.15
Cms=0.000102
Rms=6.37
Mmd=190.63
Le=1.6
Re=5.1
PH1=1
S6=1363
Con=24.86
S8=1363
Con=21.8
S9=1363
Con=1.9
Pmax=71
Xmax=9.1
Path=0
Mass=0
Re'=5.25
Leb=0.89
Le=3.66
Ke=0.18
Rss=50.17
Rms=0
Ams=0
Comment=BOXPLAN-PARAA 0.6 BETA - 2022-05-21 08:18:25
I think the minor differences between the TH and PH1 exports have more to do with the approximations BOXPLAN makes about the path lengths in the models than anything else.
try this in HR, look at 860, 1720, 2580 hz (TH mode cant proide that accuracy, as the rear of the driver isnt described in such detail . this is a huge advantage once built, its obvious . in comparison to a >paraflex< its just a piggyback TL >in phase< where it lands on the other.
not a paraflex, its gotten rid of the akward top of the bandwidth and goofy rolloff(in real life). Paraflex is loud but it’s far from perfect. A little more Atention to each sides length from the other and the closed and distances(offset) as driven and it becomes a whole Nother animal
not a paraflex, its gotten rid of the akward top of the bandwidth and goofy rolloff(in real life). Paraflex is loud but it’s far from perfect. A little more Atention to each sides length from the other and the closed and distances(offset) as driven and it becomes a whole Nother animal
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Was this used on just a demo woofer or the specs I gave? because even when I went and changed the values which were only off by .2 on some I got no change in frequency response. My numbers however were the same as the pics you posted so I assumed you were showing me it was possible with the information I gave. However, I didn’t get the same results. I’m probably just missing something simple and looking dumb lol. I really appreciate the help.
I am confused on this response idk what this has to do with my question? Those frequency’s are way off from what I was asking? Please fill me in tho if I am not understanding because I am really trying to understand everything and far from knowing it all. I appreciate any help I can get.
My test example used the Hornresp default driver parameter values.
The reason why the boxplan-paraa.xls exported TH and PH1 results are not exactly the same when simulated in Hornresp is because the exported system models are not the same. Attachment 1 shows the exported TH model and Attachment 2 shows the exported PH1 model. Each set of results is correct, for the given model.
The results will only be the same if the system models are the same. For virtually no difference between the two sets of results:
In the TH design:
Set Vtc and Atc = 0
In the PH1 design:
1. Set the length of segment 5 = 0.01
2. Set the length of segment 6 = Lrc (value given in the TH design)
Attachments
that did work to make my results the same. when i change vtc and atc to zero i get the same frequency response. I guess my main question for the given setup which one do i follow? or what is the difference? i feel like i am not grasping what is really going on when i change those to 0. with the given setup from the boxplan that I am working with shouldnt the vtc and atc be 0? as there is no throat chamber from what i understand? or am I completely wrong?
Is extremely hard to type and explain so it never works out in this format however what I’m saying works spectacular in reality.
We want to know what’s going on on both sides of the driver if you were going to build any enclosure👍🏻👍🏻. It Becomes extremely important tapped or clocked and tapped entry (whhatever you wanna call it headers is the distance between the two driver inputs no matter what that can’t be compromised ) versions of quarter wave alignment and is very nicely pointed out thanks to David’s new PH section if you Give it the right information(build the right thing). Everything is based on a circleEvery single thing is oscillating or vibrating etc. and is a mathematical version of a sine wave when looked at. base your cabinet on one too. Look at what happens. discover it don’t think about it.. You won’t find it otherwise. clear your head…
Using advanced center line method only looks at one thing and Misses an opportunity to realize what’s really going on in the big picture. I have a telescope with mirrors and lenses except there are no lenses there is super position of a wave bouncing off a perfectly rigid and parallel endpoint of a rectangle (long and kinda skinny), that is a quarter wave path. But there are 3(series tuned 2:1 driver offset or path break,roar) or 4 ( parallel to series dual parralel qw pipes with same exit) .
This is Where you fold and why. But even more important where the driver entry is in the first fold from the ‘absolute end’ and the rest of the path to exit and in between the folding.
fibonacci. 0.1.1.2.3. (0) From the driver to the closed-end (1) back to the driver(1) two more lengths to the 180 degree fold(2) and then the same thing length overall ,again, in the next fold (3).
Coming from the other side you have the exact opposite and those would converge at Centerpoint in the enclosure.
if enClosure is 360 cm long, fold is at 3,6,9. Both ends are at 0,12. Driver Entry at 1,11.
360÷12 is 30. 30 is 0.5236 in radians. Thats 2x the golden ratio of 0.2618(15). There are 24 parts in 360 is 15. 15 is 150,000 000 m from the sun. (149.6) it’s no coincidence that this happens(pic), that’s only one of an incredible amount of details that spell out all of these things and what they mean.
we take everything for granted as humans. But design one speaker enclosure based on the circumference of a circle is 360 and ask yourself why you’re looking at a picture perfect version of the solar system in meters (and miles) (as hartz) and unit of time(seconds) on earth as well?
1.609344 km/mile
1.609.142867(11264/7) 512pi
25.142857(176/7(1440)
0.3937 inch/meter
0.392857142(2.75/7)or 22.5 (*pi/8)
Pataflex and roar have been ‘tweeked’ in ways that greatly improve upon the originals. This Is all a credit to David McBean and how he has allowed us to look at both sides of the driver (on both sides of the cone) in each path. Up stream and down stream.
Neither ‘ROAR’ nor ‘Paraflex ‘ use this method. It is however what the DIY community is doing elsewhere… It’s up to you to decide
But the results using 90/180/270(360) cm with pi 22/7(180
)or
80/160/240(320) cm (with ‘pi’ as 80/2.54) are outstanding in the same way pi/9 is to ‘offset driver’ entry TL.
In the same way the speed of light is used as a number three or as a square root of 1728 or 299792457759 or (432)^2,
so is the functions of the numbers inside quarter wave pipes.
0.349 is 20 degrees in 22/7(0.349206349)
0.349 is also (432)^4, and (432)^2 is within 400 of the speed of light in miles per second
That will carry on in everything, (1.609344 miles/mter) 4- 3.936” /meter… 3.840000 km from earth, 3.8 cm/year
345.6 m/sec (864 hz at 1 meter) vs 344.0 m/sec(860 at one meter)
1:4 nuclear fusiin at center of sub. 1/4 wave functioon in a sibe wave at node/antinode..
Its all the same. But you gotta make it show you these things and horn response does.(860 is 864, 430 is 432)
.433 inches is 11 mm
0.866 inches is 22 mm
1.732 inches is 44 mm
11/7
22/7
44/7
11/2.54
22/2.54
44/2.54
88/2.54
176/2.54
352/2.54
Whether you look at those or not or whether you understand them without digging deeper into those numbers that is what this is all about and it all comes full circle no pun intended to the centimeters which is the definition which iWhether you look at those or not or whether you understand them without digging deeper into those numbers that is what this is all about and it all comes full circle no pun intended to the centimeters which One drop of freshwater anywhere on earth at any time. A Circle.
and a kilogram is 1000 of those by weight or mass on earth. But the gravitational constant is merely pi squared roughly at the equator..
And the speed of sound is just than 360 times pi. 1130.97335529232 (Ft/sec) as 354.6 m/s. 1 meter is 86.4 hz . 86400 seconds in 24 hrs, 24 hz is 360 cm… 36 hz is 240 cm…
these Things matter, more than anything. Your subwoofer isn’t doing this it’s not right either..That can be seen in horn response.
You have a timing sequence and a suck and blow potential that’s in sync with a pendulum swing for that frequency.. it’s the same numbers in the speed of light in radians is 30° in 360 is 12parts(zodiak is wrong, More than 12 by a little bit it’s the progression of time it’s the 365.25 days in a year it’s all these things all over creating a small aiMore than 12 by a little bit it’s the progression of time it’s the 365.25 days in a year it’s all these things all over creating a small error error..
365.25/360,( 0.985628)?
0.250/2.54 is 0.9842519…
873/864 is 09869072
2.99792458/3 is 0.99930819.33
Gravity : 9.8696? (Pi)^2… only at the equator… 32 ft/sec 21-3.1416? Or 31496? Or 31428
yes?’ All of them: they are saying the same thing:
0.98xxxx(5.625)(just less than ‘1’..
0.1309(0.13095238)7.5(1/4 Speed of light wave form (748-750)
0.1963495(11.25)
034906585(0349206349)(20)
0392699(392857)22.5(3/4 sol)
0.5236 (0.5238) (30)(sol)
10472(1.047619476)(60)(2sol)
156(1.57142>m)90*(3 sol)
2094395(2095238)120*
261799(26190476–(golden ratio) at 150 *
31416(3142857)(180*
3.6651914(3.666666)210*
41887(4.190476)240*
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Hi Brian,
From a Hornresp perspective it is reassuring to see that your boxplan-paraa.xls system can be modelled as either a paraflex horn or a tapped horn, without there being a great difference in the results.
To avoid ongoing confusion however, it could perhaps be worth considering removing the TH export option from the spreadsheet
.
Just a thought...
Kind regards,
David
From a Hornresp perspective it is reassuring to see that your boxplan-paraa.xls system can be modelled as either a paraflex horn or a tapped horn, without there being a great difference in the results.
To avoid ongoing confusion however, it could perhaps be worth considering removing the TH export option from the spreadsheet
.Just a thought...
Kind regards,
David
Attachments
