Hi soho54,
I just wanted to point out, that you cannot have too much excursion in a tapped horn driver. The impulse data seems to be just part of the characteristics of tapped horns, most seem to like the sound ...... 🙂.
Regards,
I just wanted to point out, that you cannot have too much excursion in a tapped horn driver. The impulse data seems to be just part of the characteristics of tapped horns, most seem to like the sound ...... 🙂.
Regards,
tb46,
Sorry, I'm not following what you mean about the xmax. Is it about my comment on matt @ image dynamics comment?
The/all TH Impulse data shows the non-loaded output from the rear tap hitting the measurement point before the horn loaded front tap output makes it there while picking up the now 180deg rear tap output as well.
The greater the distance between the rear tap, front tap, and horn throat the greater the initial and trailing gaps.
The first blob is the rear tap
The second is the front + 180dg rear tap
The third is the trailing 1/4w from the front tap
The fourth is the reflection of the second back through the horn.
Sorry, I'm not following what you mean about the xmax. Is it about my comment on matt @ image dynamics comment?
The/all TH Impulse data shows the non-loaded output from the rear tap hitting the measurement point before the horn loaded front tap output makes it there while picking up the now 180deg rear tap output as well.
The greater the distance between the rear tap, front tap, and horn throat the greater the initial and trailing gaps.
The first blob is the rear tap
The second is the front + 180dg rear tap
The third is the trailing 1/4w from the front tap
The fourth is the reflection of the second back through the horn.
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yes... the statement from matt. he said that a taphorn is designed to do all the work and that the crappiest of drivers can be used because high bl drivers are not needed... the taphorn makes up for their weaknesses. mentioned something about taphorn designs are for people with low budgets for power supplies and drivers. he pretty much said the idmax would be a waste of time, space, and money because you wouldnt be using that much power, and a crappy driver can achieve the same results because the taphorn does all the work... maximum excursion will not be achieved... blah blah blah
Hi soho54,
Yes, as nephylum stated in Post #25, my comment about Xmax was in reference to the comment in Post #13, that's why I suggested the long line length tapped horn in Post #18. Sorry for not being clearer in my comments.
Regards,
Yes, as nephylum stated in Post #25, my comment about Xmax was in reference to the comment in Post #13, that's why I suggested the long line length tapped horn in Post #18. Sorry for not being clearer in my comments.
Regards,
is this what you mean by long line length?
An externally hosted image should be here but it was not working when we last tested it.
nephylum, your quote/paraphrase of his comments this time are even worse.
If you reverse everything he said it would be right. 😉
If you reverse everything he said it would be right. 😉
ok... i guess i know what your talking about. still totally clueless. all i know how to do is buy the drivers, amp, and build the box.
Hi guys,
Heck, I'm lost now (nothing new there 🙂). Anyhow, the long line length is in reference to the tapped horn from Post #18. Bjorno is the one to ask about the T-TQWT.
Regards,
Heck, I'm lost now (nothing new there 🙂). Anyhow, the long line length is in reference to the tapped horn from Post #18. Bjorno is the one to ask about the T-TQWT.
Regards,
i think these measurements are all wrong... can we start over?
IMP 2 / 8ohms Nominal Impedance
Re 3.0/ 6.0 Ohms DC Resistance
Fs 20Hz Resonant frequency
Qes .40 Electrical “Q”
Qms 2.1 Mechanical“Q”
Qts .34 Total “ Q”
Vas 5.81 cuft (165 liters) Equivalent volume
Xmax 24.9mm One way linear
Sd 545 cm2 ConeArea
Spl 93.1dB/88 dB 1w/1mG.P./SPLi
Pwr 1000 Watts RMS POWER
IMP 2 / 8ohms Nominal Impedance
Re 3.0/ 6.0 Ohms DC Resistance
Fs 20Hz Resonant frequency
Qes .40 Electrical “Q”
Qms 2.1 Mechanical“Q”
Qts .34 Total “ Q”
Vas 5.81 cuft (165 liters) Equivalent volume
Xmax 24.9mm One way linear
Sd 545 cm2 ConeArea
Spl 93.1dB/88 dB 1w/1mG.P./SPLi
Pwr 1000 Watts RMS POWER
1000 Watts is all you have to look at - that means all the numbers are some salesman´s patter. Might still be a good driver, mind...in a rather large horn, if The Missus doesn´t mind monsters in the living room.
("Wantit, wantit, wantit" - Gollum)
Pit
("Wantit, wantit, wantit" - Gollum)
Pit
she doesnt mind the huge monsters... i pay the bills, i make the rules 😱
all i need is the know how and i'll start building these beast
Hmmm...not wanting to rain on your parade - but getting a divorce can be done cheaper.
Designing a complete new box with just some rather iffish numbers...not the engineering you want to do as your first project. There are plenty plans available for affordable drivers, and enough new old friends here to help you get going.
Greets to Her Whose Voice Is Law.
Pit😉
Designing a complete new box with just some rather iffish numbers...not the engineering you want to do as your first project. There are plenty plans available for affordable drivers, and enough new old friends here to help you get going.
Greets to Her Whose Voice Is Law.
Pit😉
Post #34
Hi nephylum,
No need to start all over, the error in my tapped horn simulation was that I entered Qes as 3.4 instead of 0.40, and the difference in the simulation result is insignificant; change Bl to 17.49 (as jbell had it on Page 1) and you're fine. Le is larger than you would expect as I added a series inductance, this accounts for the Rg change too (both changes mildly affect the ripple). I just wanted to give you an example of what you can do in Hornresp, so that you can modify the model to your likeing. Building a tapped horn without using a simulation program is almost a bad as building it without a tap measure, or you're just relying on the input of others. littlemike has written a nice intro to Hornresp, and it should not take a lot of time to go through it.
As to the T/S parameters for the driver you are using, it would be better to measure the drivers you have on hand, and make whatever corrections to your simulation.
Naturally, there is always the 2'x2'x2' closed box solution (give or take 10" a side). 🙂
Regards,
Hi nephylum,
No need to start all over, the error in my tapped horn simulation was that I entered Qes as 3.4 instead of 0.40, and the difference in the simulation result is insignificant; change Bl to 17.49 (as jbell had it on Page 1) and you're fine. Le is larger than you would expect as I added a series inductance, this accounts for the Rg change too (both changes mildly affect the ripple). I just wanted to give you an example of what you can do in Hornresp, so that you can modify the model to your likeing. Building a tapped horn without using a simulation program is almost a bad as building it without a tap measure, or you're just relying on the input of others. littlemike has written a nice intro to Hornresp, and it should not take a lot of time to go through it.
As to the T/S parameters for the driver you are using, it would be better to measure the drivers you have on hand, and make whatever corrections to your simulation.
Naturally, there is always the 2'x2'x2' closed box solution (give or take 10" a side). 🙂
Regards,
Tall and skinny (?)
Hi nephylum,
Well, I'm typoing right along: 3.4 v. 0.34 (last post) oh, what's the difference.
To get an idea what you are looking at with a tall enclosure for this type of tapped horn, take a look at the Danley DTS-20 for the dimensions (87.5"H x 20"W x 18"D), and the drawing of a possible folding from the patent. Other foldings - like the one Don Snyder used for the LAB12 - come to mind, but for tall w/ small footprint it's hard to beat the DTS-20.
Regards,
Hi nephylum,
Well, I'm typoing right along: 3.4 v. 0.34 (last post) oh, what's the difference.
To get an idea what you are looking at with a tall enclosure for this type of tapped horn, take a look at the Danley DTS-20 for the dimensions (87.5"H x 20"W x 18"D), and the drawing of a possible folding from the patent. Other foldings - like the one Don Snyder used for the LAB12 - come to mind, but for tall w/ small footprint it's hard to beat the DTS-20.
Regards,
Attachments
you think i can do the dts-20 design with the idmax? this is definitely what im looking for.
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