you missed a 0 in VTC.
press prntscreen with the window you want to capture open. open ms paint. paste. crop. save as jpg. upload.
press prntscreen with the window you want to capture open. open ms paint. paste. crop. save as jpg. upload.
Well, one reason is you need to use the tapped horn driver [TH] option, not offset [OD]............. Sorry, don't have time ATM to check the rest.
GM
hahahaha, GM good catch. he also need to change to par segments as well.... but that will have minor effect other than the 2 things we noted...
Gadwin Print Screen
Hey crissty,
Download "Gadwin Print Screen" a free ware that lets you stretch a window around anything on the screen, like a CAD system, than asks you for a name and where to save it and what form to save it as, jpg, gif etc...
Dave
Hey crissty,
Download "Gadwin Print Screen" a free ware that lets you stretch a window around anything on the screen, like a CAD system, than asks you for a name and where to save it and what form to save it as, jpg, gif etc...
Dave
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Shows you how much attention I paid! I just noticed that the response plot needed to be a TH alignment............
GM
"are the inputs provided correct..?? "
I doubt it, the response in nothing like the graph EV publishes.
(and I trust Hornresp)
I doubt it, the response in nothing like the graph EV publishes.
(and I trust Hornresp)
response of my posted input screen, with dayton pa 460 driver, 2 pi, 2.83v
far better than the posted chart (assuming posted is 2 pi)
EDIT
we have told you exactly what to fix with your screen.
you did not copy VTC right. add a 0 to your result (you curently have 10.3 liters, not 103 liters).
change to TH
Change con segments to PAR
far better than the posted chart (assuming posted is 2 pi)
EDIT
we have told you exactly what to fix with your screen.
you did not copy VTC right. add a 0 to your result (you curently have 10.3 liters, not 103 liters).
change to TH
Change con segments to PAR
Attachments
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"change to TH"
But it's not a TH, it's a reflex box with a horn port.
That simulation shows about 4dB more than it can actually do.
http://1.bp.blogspot.com/-ZH3QvntzPDY/UErYSqyPKJI/AAAAAAAAAK8/bVoldL6cTQI/s1600/electro_voice104.jpg
But it's not a TH, it's a reflex box with a horn port.
That simulation shows about 4dB more than it can actually do.
http://1.bp.blogspot.com/-ZH3QvntzPDY/UErYSqyPKJI/AAAAAAAAAK8/bVoldL6cTQI/s1600/electro_voice104.jpg
it is a th with a big throat chamber,and wil act as simulated by sine imho.
(if the numbers are correct)
(if the numbers are correct)
But T18 has a big Chamber of about i suppose 85lit approx, i also changed to PAR still the same
Attachments
If the pic posted by Chris in post 6 is accurate it certainly looks like a tapped horn with a big throat chamber to me. The pic you linked to is not as detailed as the one in post 6, but your pic also looks like a tapped horn to me.
Well, if it's simulated at 1 watt instead of 2.83 volts you lose 2 db right off the bat. Then if you consider that it's a different driver than the original design used, that and/or measurement conditions and procedures would probably explain the remainder of the difference.
Pic 1 - using Sine's inputs, simulated as TH (dark black) vs Nd (light grey)
Notice the remarkable resemblance in the TH sim vs the response graph you posted in post 14 (copied and pasted here on the Hornresp sim) and the lack of accuracy when simulated as Nd.
Pic 2 - simulated at 2.83V (dark black) vs 2.37V (light grey) the latter of which is actually 1 watt, and remember this is a different driver than the original
Assuming the input dimensions are all as correct as they can be, it looks like Sine nailed it, which really isn't a surprise since he's got skillz like that.
An externally hosted image should be here but it was not working when we last tested it.
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You are still missing a 0 in the Vtc, so you are simulating the chamber 10x smaller than it's supposed to be. You've already been told this twice.
Copy the inputs from post 15 exactly (like I did) and you will get the same result I've shown in the last post.
EDIT - just be be really really clear about this, Vtc is supposed to be 103000, not 10300.
EDIT 2 - you've also been told how to do screen capture in two different ways. It's really easy. The way I do it is click ALT + Print Screen, then paste the image in MS Paint and save the file. It will save you a lot of time vs taking pictures of the screen, uploading the pics, etc.
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Like I said, due to not being able to do an ND version of tapped horn (maybe I can now with the multiple entry horn being added to hornresp), o didn't focus on it being perfect. in reality vtc will be Lower due to driver displacemwnt, which should seriously hurt the low end response (as the large chamber is mostly responsible for that)
Yeah, technically it's not a TH, just a 6th order alignment where the front chamber and vent is morphed into one expanding duct, but don't know how we can accurately sim it in HR other than approximate it as a 'special' TH to get the 'driver-in-mouth' location.
GM
GM
There's only so much you can do with Hornresp's limitations, and as such your sim is close enough (if the chamber and segments sizes are accurate).
A 10 percent reduction in chamber size doesn't make much difference. A 20 percent reduction makes quite a bit more difference but I don't think the driver is that big, and it's mounted from the front so the material thickness keeps a bit of the driver .75 inches forward of the chamber.
Another issue is that the front of the driver should be set back from the mouth a few cm, but there's nothing you can do about that with Hornresp.
All things considered, ideally it should be simulated in Akabak but you sim is about as good as it's going to get in Hornresp (if you calculated all the dimensions correctly).
A 10 percent reduction in chamber size doesn't make much difference. A 20 percent reduction makes quite a bit more difference but I don't think the driver is that big, and it's mounted from the front so the material thickness keeps a bit of the driver .75 inches forward of the chamber.
Another issue is that the front of the driver should be set back from the mouth a few cm, but there's nothing you can do about that with Hornresp.
All things considered, ideally it should be simulated in Akabak but you sim is about as good as it's going to get in Hornresp (if you calculated all the dimensions correctly).
Not by Danley's definition, no. But call it a tapped horn, a special tapped horn, a tapped BLH, a 6th order alignment, a bandpass, a reflex box with a horn port and the driver in the port, or any of a number of other things, it's just a name, and there is no formal name for this so it doesn't really matter what you call it, and names are not that important anyway since all named alignments morph into something else at some point that's not always clearly defined.
The important thing is that it needs to simulated as TH in Hornresp. Or ideally simulated in Akabak.
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