Tang Bang W8-1772 Impressions. - Page 33 - diyAudio
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Old 11th November 2010, 08:30 PM   #321
Abelma is offline Abelma  Belgium
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Thanks Vadim...That is a nice idea.....I am wonder if it affect the sound quality?

Quote:
Originally Posted by VadimB View Post
I would suggest to use this:
FMOD Crossover Pair 30 Hz High Pass | Parts-Express.com

in front of your power amp

Vadim
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Old 11th November 2010, 08:42 PM   #322
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Quote:
Originally Posted by VadimB View Post
I would suggest to use this:
FMOD Crossover Pair 30 Hz High Pass | Parts-Express.com

in front of your power amp
Keep in mind that those are just generic PLLXO... you are better off rolling your own for your specific amplifier,

dave
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Old 11th November 2010, 09:39 PM   #323
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I did not read every post in this thread, so maybe my question is obsolete. Sorry for that.

Is it possible to place a highpass for the W8-1772 at e.g. 100 hz?

I would use two Ripol Subs together with these nice drivers to ensure that I can hear in higher sound volumes

Bad idea?
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Old 22nd November 2010, 05:53 PM   #324
Abelma is offline Abelma  Belgium
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Hi Bob,

Do you know the new Tang Band W6-1916 ? I am wonder what would be the difference in sound quality against the W8-1772 that I would like to get. It is a little cheaper and less sensitivity, but, for mids and highs looks the same response? And also the impedance curve looks same as flat. Thanks for your opinion.


Quote:
Originally Posted by Bob Brines View Post
I have run T/S tests on a pair of 1772's using a Smith & Larson Speaker Tester. The drivers were broken in for one hour a Xmax. Average of three runs each for the two drivers are:

Re ohms 7.28996
Fs Hz 42.59512
Zmax ohms 28.85236
Qes 0.44508
Qms 1.31602
Qts 0.33256
Le mH 0.04414
Diam mm 165.5
Sd mm^2 21512.25
Vas L 72.76948
BL N/A 7.4432
Mms g 12.6453
Cms uM/N 1106.912
Kms N/M 905.7046
Rms R 2.57074
Efficiency % 1.1911
Sensitivity dB(1 watt) 92.76138
Sensitivity dB(2.83 volt) 93.166

The S&L tester does a constant current test, so the numbers will differ somewhat from testers that do constant voltage. The results are not surprising. the Vas lower than published is what I normally see, although I would have expected Qts to be somewhat higher than published rather than lower.

Click the image to open in full size.

Nothing untoward here. I won't try to explain the glitch at 150Hz for now. I am impressed that there is no reflection off of the surround at ~1000Hz. That big old aluminum phase plug plus (I presume) a shorting ring very effectively kills any impedance rise.

One thing of note: The 1772's suspension is either not progressive or only weakly so. Unlike most Fostex drivers that can't be over-driven to Xsus, it is very easy to bounce the TB off of the back plate. Some care will be required is high SLP low frequency applications.

I will mount these drivers in my FT-2000 cabinet (MLTL). I won't be testing on an EIC baffle, so my FR plots may well have some box defraction artifacts in them, but so be it. It may be a few days before I report back.

Bob
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Old 22nd November 2010, 08:26 PM   #325
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To answer Waterl00 - yes, the 1772 should be fine highpassed at 100 Hz, assuming they're used with an enclosure and at a volume that will not overstress them on the low notes.
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Old 22nd November 2010, 08:31 PM   #326
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Quote:
Originally Posted by Abelma View Post
Hi Bob,

Do you know the new Tang Band W6-1916 ? I am wonder what would be the difference in sound quality against the W8-1772 that I would like to get. It is a little cheaper and less sensitivity, but, for mids and highs looks the same response? And also the impedance curve looks same as flat. Thanks for your opinion.
You should probably take this to the W6-1916 thread. I have not heard this driver, but TB is working on a series of full-rangers W5-1880, W6-1916, W8-1772 and W8-1808. I'm guessing that they all have a family sound. I will be definitely interested in the W6-1916, although I think that the Alpair 12 will be my choice for the next iteration of my FT-1600 speakers.

Bob
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Old 22nd November 2010, 09:29 PM   #327
Abelma is offline Abelma  Belgium
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Thank you Bob.
I just started a new thread, we'll see.

Quote:
Originally Posted by Bob Brines View Post
You should probably take this to the W6-1916 thread. I have not heard this driver, but TB is working on a series of full-rangers W5-1880, W6-1916, W8-1772 and W8-1808. I'm guessing that they all have a family sound. I will be definitely interested in the W6-1916, although I think that the Alpair 12 will be my choice for the next iteration of my FT-1600 speakers.

Bob
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Old 22nd November 2010, 10:59 PM   #328
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Quote:
Originally Posted by AstroSonic View Post
The Exotic and DX-4 drivers are comparably priced, fairly divergent appraoches to the full range driver. Better is probably a matter of personal preference, but a comparison or characterization of their sound quality would be helpful. I think many are curious about the sound quality of the more 'premium' full range drivers.
The SEAS will give you actual bottom end in an OB. You will
not see this from Lowthers, Feastrex, etc. The SEAS tends
toward neutral in the mid and top, its faults being mostly
sins of omission. Lowthers and Feastrex deliver more detail
and drama in the mid and top, and some sins of commission,
and often like a little EQ.

I prefer "premium" drivers if you are willing to go to the
trouble of adding a woofer and trim the upper mid a bit, but
you can end up spending quite a bit of money on the drivers
themselves.

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Old 27th November 2010, 02:24 PM   #329
Abelma is offline Abelma  Belgium
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Just ordered a pair of W8-1772!...I will share my impressions. This driver need a zobel or any kind of correction filter to use in a open baffle? The -200 Hz will be driven by a old 15" woofer from my Pioneer loudspeakers Cs-V9910. The woofer has a small magneto so, I think it has a high Qts?
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Old 27th November 2010, 02:59 PM   #330
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Quote:
Originally Posted by Abelma View Post
The woofer has a small magneto so, I think it has a high Qts?
Not according to the professionally measured specs in this thread's first post.

GM
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