Tang Band W8-1772 FAST recommendations - diyAudio
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Old 12th March 2016, 07:15 AM   #1
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Default Tang Band W8-1772 FAST recommendations

So this will be my first foray into the FAST scene after many years in DIY multi way speakers.

These will be dedicated for 2 channel critical listening and occasional L/R home theater use in a 13 X 18 ft purpose built media room. Listening distance is approximately 11 ft with 8 ft between the two speakers.

Here's what I have to work with......

Two JBL 2226 15" woofers. To drive them, I have an NHT Studio subwoofer stereo amplifier at 250w pch at 8 ohms. There's a selectable low pass 2nd order filter whose high limit is 240hz 2nd order. My initial plan is 5 cuft ported boxes tuned to 30hz and running up to 240hz. These will serve as stands/bass modules for the W8-1772.

So the question is.....what to do with the W8-1772? Open baffle/dipole would seem like an ideal application since I really don't need any low end response.....the JBLs are world class woofers and play super clean to 800hz if needed........but my thinking says keep the entire male vocal range within the fullrange driver.

Or would the 1772 be better suited to a boxed alignment? Ideally, I'd like to keep the fullrange module baffle under 12" wide, smaller if possible. Aesthetically I'd like something similiar to a B&W 801.
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Old 12th March 2016, 08:05 AM   #2
hm is offline hm  Europe
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Default TB W8-1772

Hello,

if you listen low level, i would sale the bass.
my solution would be the double horns Saxophon, Posaune XL, or RDH20,
wall and corner placement, down 35 Hz, low membran movement,
max. SPL~105 dB, back driver Monacor SPH-210,

or for a fast system, a satellite horn >120 Hz the SCHALMEI or Trumpet sat,

look my HP, with measurements and feedback.
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Last edited by hm; 12th March 2016 at 08:08 AM.
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Old 12th March 2016, 11:52 AM   #3
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Excellent work hm.

I do listen at reference levels, usually with home theater applications and this where the JBL woofers will be important in relieving the full range driver of any bass responsibility to keep linear cone movement to a minimum and maximize power handling and output.
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Old 12th March 2016, 12:15 PM   #4
hm is offline hm  Europe
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Default 1772

OK, thanks.

i would try the schalmei with 1772 activ 150 Hz 12 dB.
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Old 13th March 2016, 05:55 PM   #5
sayrum is offline sayrum  Germany
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Hey
maybe a dipol fast with the 1772 is of interest: ....::: HIFIAkademie.de :::....

Regards
Daniel
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Old 13th March 2016, 07:57 PM   #6
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It is.......with the 1808 and the higher Q.

The upper mid and high freq response of these drivers is ROUGH. I'm gonna need DSP to pull this off I think. Lots of reviews of a HOT top and either pass on them or listen off axis.
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Old 14th March 2016, 02:45 AM   #7
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I have gone the DSP way and never looked back.

It started with my line arrays, and now with the 1772s.

I couldn't get good sound with the arrays without it (arrays need strong EQ).

The same with the 1772, it was shouty and I didn't like it... until I applied DSP to tame it and take care of some room shortcomings.

Then, they shone.

I think you are a perfect candidate for the app JRiver. It could allow you to do your FAST easily with their crossover function. Applying DSP is also a breeze with convolution included in the app. And JRiver is great for H/T as well.
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Old 14th March 2016, 02:57 AM   #8
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Lost long-ish post...

I started with DSP when I built my line arrays. Line arrays are famous for needing strong EQ.

I followed up when I built my 1772, because as is, they are shouty, and to compensate some room shortcomings.
You wouldn't need so big enclosure if you went sealed. But the 1772s will never look like the B&W 801.

I think you are a good candidate for the app JRiver.

It would allow you to do your FAST easily, and choose the kind of crossover you wish. It also has DSP with convolution, which made the 1772 shine finally.

JRiver is also great for H/T.

Click the image to open in full size.
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Old 23rd March 2016, 07:55 PM   #9
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Thanks Perceval, very encouraging that you're happy with the W8 and DSP. I really didn't want to add another ADDA device in the chain but it sounds like it's necessary or simpler than bashing it into compliance with passive components.

Maybe Bob Brines will chime in?
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Old 23rd March 2016, 08:19 PM   #10
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Quote:
Originally Posted by mayhem13 View Post
So this will be my first foray into the FAST scene after many years in DIY multi way speakers.

....but my thinking says keep the entire male vocal range within the fullrange driver.
I made that same decision with a tri-amp'd system I was building. I hooked a mic up to an RTA and hummed into it what I considered to be a somewhat low talking voice frequency, then noticed the RTA showed max energy at 111HZ, so I chose 100HZ for the division between woofer and midrange. 240HZ seems too high. When a male singer hits a low note, the feel of the presentation may change significantly.

If you go open baffle on the mid driver(s), you will need high Xmax drivers and EQ that pumps them up at 6dB/oct from about 600HZ on down, depending on baffle step response (that was my experience). I'd recommend at least two 8 inch drivers per side, and a 4 pole active crossover, if you want to go open baffle down to 100HZ. Anything less will disappoint if you prefer "reference" levels (I assume that means pretty loud). I speak from experience. The Linkwitzlab website is a great place to learn about open baffle details and even circuits. I do recommend open baffle for 100HZ to about 1kHZ IF the speakers can be positioned at least 3 feet away from any walls. Otherwise the psycho-acoustic effect is a negative instead of a positive. OB regenerates some of what's lost due to inter-aural crosstalk, giving the sound a more 3-D feel.

Last edited by Bob Richards; 23rd March 2016 at 08:22 PM.
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