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Old 4th May 2021, 10:50 AM   #31
USRFobiwan is offline USRFobiwan
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these are 2v/1m since its a 4 ohm driver. mic is calibrated using calibrator, spl meter also calibrated using calibrator. amp voltage output calibrated using TRMS meter.

The front of the Type-R is relative small. since its modal is more depth than width. Here is a 3D image of the initial design by Ty Cention.

Paraflex-type-R-18s-21ntlw5000-3d-view.jpg
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Old 4th May 2021, 11:55 AM   #32
martinsson is offline martinsson  Sweden
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Great! It sometimes pay to ask since measuring correctly is a great deal harder to do, or to even be able to do, than simply just measure as I have done in the past, indoors, using an rta, at the aperture, which can be misleading when comparing results.

I normally think that as long as one describes exactly how one measures and what equipment was used as well as the state of that equipment then it is never a wasted effort, but measuring for comparative purposes requires alot more, which is what you have done, thanks, impressive!
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Old 4th May 2021, 12:19 PM   #33
USRFobiwan is offline USRFobiwan
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Quote:
Originally Posted by martinsson View Post
to me phase and HD up to 3rd or perhaps 5th order is more interesting as that tells you more about the what the bandwidth is made up of and how to process them for best result, not to take anything away from what you shared here, great stuff, thanks.
You asked for it...

Paraflex-type-r-distortion-measure.png

Paraflex-type-r-phase-measure.png
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Last edited by USRFobiwan; 4th May 2021 at 12:22 PM.
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Old 5th May 2021, 01:45 AM   #34
weltersys is offline weltersys  United States
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Quote:
Originally Posted by USRFobiwan View Post
these are 2v/1m since its a 4 ohm driver. mic is calibrated using calibrator, spl meter also calibrated using calibrator. amp voltage output calibrated using TRMS meter.
USRFobiwan,

The low end increase in the measurement of the Type-R-121 over the Hornresp simulation in post #27 is interesting, as is the upper extension.

1) Could you post the measurement with no smoothing?

2) What was the distance from mic and cabinet mouth to the nearest building wall (or vehicle) in your outside ground plane measurement of the Type-R-121?

3) I'm still curious (ten years after.. Tapped Horn Directivity) about the polar response of this type of sub, do you have access to an outdoor area with at 50 meter distance in all directions from boundaries you could test at 10meter/20 volt (and higher) levels?

Cheers,
Art

Last edited by weltersys; 5th May 2021 at 01:50 AM.
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Old 5th May 2021, 02:33 AM   #35
Booger weldz is offline Booger weldz  United States
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Quote:
Originally Posted by USRFobiwan View Post
You asked for it... PHASE

Attachment 948652
So horn response refers to these +180/180-as 90/90 and 90/630 positive ? Or 0/0 and 0/720 positive?

And if so, where's the 135 and 210 @ (+ 180?)

If you offset driver at 30
And 210(@30degrees in each pipe out of 360as 270/90)

Last edited by Booger weldz; 5th May 2021 at 02:39 AM.
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Old 5th May 2021, 10:23 AM   #36
USRFobiwan is offline USRFobiwan
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Art the first image HR vs Measure is the unsmoothed response.

Distance mic <> cab. 1m.
bounderies about 30m free in front. at the sides and rear some bounderies between 10 and 15m
No i cant do 50m all arround free of bounderies. Unless I bring it to a festival gig. (which is imposible at the moment)

Here is the waterfall... also unsmoothed
Paraflex-type-r-121-waterfall-measure.png
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Last edited by USRFobiwan; 5th May 2021 at 10:28 AM.
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Old 5th May 2021, 02:58 PM   #37
Circlomanen is offline Circlomanen  Sweden
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Great data! Thanks for posting all these measurements!

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