Ultimate Open baffle for tannoy red 15 inch - Page 2 - diyAudio
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Old 11th November 2012, 02:34 PM   #11
sreten is offline sreten  United Kingdom
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Hi,

Wise move. Its the wrong driver for an open baffle, go big low vented.

Wide and not that deep will go far lower and louder than open baffle.

Click the image to open in full size.

A near "ultimate" cabinet for a 15" Red.

rgds, sreten.
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Old 11th November 2012, 02:40 PM   #12
boset is offline boset  Slovenia
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HI,
I got 15'' Woffer from Dayton Audio

There will be no bass if you got panel near wall !
in other way i am newer go back to box sub

it's tuned to 22Hz
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Old 11th November 2012, 02:44 PM   #13
boset is offline boset  Slovenia
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as for the QTS its should be above 0.3 - 0.5

Last edited by boset; 11th November 2012 at 02:55 PM.
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Old 11th November 2012, 02:56 PM   #14
boset is offline boset  Slovenia
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Qts should be above 0.3 to 0.5 (bass-reflexs based driver)

Click the image to open in full size.

Last edited by boset; 11th November 2012 at 03:24 PM.
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Old 11th November 2012, 04:32 PM   #15
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Quote:
Originally Posted by Godzilla View Post
Chris661, how do you setup the inductor on the Beta 15? What values?

TIA!
I think this is it.

The HF unit was a FR driver of some sort - think it was ~6" diameter, but I don't know make/model. Its a series crossover, so it'll be fairly tolerant of switching different drivers in.

Click the image to open in full size.

I remember looking at the inductor thinking "that's a big 'un".

Sounded pretty good, anyway. Certainly one of the best OBs I've heard, but I still prefer boxes.

Chris
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Old 12th November 2012, 02:15 AM   #16
ratbagp is offline ratbagp  United States
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Out of curiosity, what is that 'ultimate' cabinet, even if the driver pictured does not appear to be the Red version.

ray
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Old 12th November 2012, 06:36 PM   #17
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In the ultimate for 15" Tan's level I think these are the ones a la GRF style but diy..
tannoy
and or these if somewhat constrainted on room size..
tannoy
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Old 17th November 2012, 05:10 PM   #18
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Here's what one of my tech buddy thinks is ideal for the tan 15"..

"Ideal" cabinet for the speaker, along with resulting characteristics would be the following:


- Cabinet volume: 2.95 cubic feet
- Minus 3 db point: 54.8 Hz
- Cabinet resonant frequency: 45.2 Hz
- With a port area of 25.13 square inches (2 X 4" pipe), port length would be 7.11"
- Peak at resonant frequency: 2.33 db


Cabinets are seldom calculated for ideal dimensions for various reasons; either the volume would be unacceptably large, or the resonant frequency too high. In our case it is the latter, and it is probably for that reason that they decided to make the cabinet larger in order to lower it. The compromise being a larger peak that would give the impression of an extended low end response at the expense of damping.




So now, for the 12.5 x 23 x 32" inside dimensions cabinet you now have:


- Cabinet volume: 5.32 cubic feet
- Minus 3 db point: 42.5 Hz
- Cabinet resonant frequency: 38.4 Hz
- With a port area of 25.13 square inches (2 X 4" pipe), port length would be 4.5"
- Peak at resonant frequency: 5.35 db


So basically the cabinet you have extends the low frequency response by approximately a third (in musical terms), but the tuning peak will be almost exactly 3 db higher, or twice the acoustic intensity, and the overall low end response would be a bit "softer" because of the higher Q factor (lower damping of the speaker).

What do you guys think.
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Old 19th November 2012, 01:48 AM   #19
Bare is offline Bare  Canada
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Sadly.. what is claimed/assumed bears little to (gasp!) no resemblance to what occurs in real life with these..using empirical measurements.

Last edited by Bare; 19th November 2012 at 01:50 AM.
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Old 29th January 2013, 11:08 PM   #20
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thx everyone..I found some grf cabs.
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