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-   -   Tang Band W8-1772 Impressions. (https://www.diyaudio.com/forums/full-range/150267-tang-band-w8-1772-impressions.html)

AstroSonic 1st September 2009 03:05 PM

Response Plot Questions
 
Bob,

These drivers sure look promising: relatively even frequency response and T/S parameters allowing reasonable bass in manageable enclosures.

Regarding the response plots, are they for the raw driver or are your BSC and HF correction networks included? I wonder how audible the two HF peaks and the suckout between 4.5 and 6.5 kHz will be. The curves for 15 and 30 degrees off axis look very promising.

Thanks for taking the lead on this.

Regards,

Bob P.

Godzilla 1st September 2009 05:14 PM

>>> Now one stretched out so the details are visible:

Many thanks Bob! The only thing i don't like about the measurements is the dip at 150hz... otherwise it looks great.

Godzilla

Bob Brines 1st September 2009 08:00 PM

Quote:

Originally Posted by AstroSonic (https://www.diyaudio.com/forums/full-range/150267-tang-band-w8-1772-impressions-post1913223.html#post1913223)
Bob,

....Regarding the response plots, are they for the raw driver or are your BSC and HF correction networks included? I wonder how audible the two HF peaks and the suckout between 4.5 and 6.5 kHz will be....

Bob P.

No BCS, No EQ. The driver is in an MLTL, not on an EIC baffle.

The 4.5kHz notch only starts to appear in the 30* plot, so at normal listening angles -- 10-15* -- it is probably not an issue. The 6.5kHz notch coincides with the sibilance peak in most pop recordings. The effect is softening of the "s" and "p" sounds. Interestingly, this notch appears in every driver I have converted to phase plugs. I have to wonder if it is not the effect of the phase plug in THIS driver. The HF peaks are so narrow in terms of octaves, that you will probably not hear them. Look at these peaks as a continuing of the general rising FR.

Bob

Bob Brines 1st September 2009 08:02 PM

Quote:

Originally Posted by Godzilla (https://www.diyaudio.com/forums/full-range/150267-tang-band-w8-1772-impressions-post1913318.html#post1913318)
>>> Now one stretched out so the details are visible:

Many thanks Bob! The only thing i don't like about the measurements is the dip at 150hz... otherwise it looks great.

Godzilla

That dip is floor bounce. You should ignore anything below ~500Hz as artifacts of the cabinet.

Bob

rdf 1st September 2009 08:41 PM

Thanks for posting this, nice work & driver. Is the elevated frequency response above ~200 Hz a baffle step artifact?

Bob Brines 1st September 2009 08:52 PM

Quote:

Originally Posted by rdf (https://www.diyaudio.com/forums/full-range/150267-tang-band-w8-1772-impressions-post1913482.html#post1913482)
Thanks for posting this, nice work & driver. Is the elevated frequency response above ~200 Hz a baffle step artifact?

Yep! That's what baffle step looks like.

Bob

speakrsrfun 1st September 2009 09:03 PM

Anyone have an idea what retail will be on these, they look good for next years project to be started in January LOL. Take care....

Bob Brines 1st September 2009 10:48 PM

Quote:

Originally Posted by speakrsrfun (https://www.diyaudio.com/forums/full-range/150267-tang-band-w8-1772-impressions-post1913499.html#post1913499)
Anyone have an idea what retail will be on these, they look good for next years project to be started in January LOL. Take care....

http://www.parts-express.com/pe/show...number=264-893

Bob

Holger Barske 1st September 2009 11:22 PM

There's a self-taken set of TSP on the German distributor's page: http://oaudio.de/Lautsprecher-Chassi...1772::664.html
Meets Bob's measurements quite nicely.

speakrsrfun 2nd September 2009 04:37 AM

Thank you sir I appreciate it, good lookin out.


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