W4 1320 bipole...dimensions? - Page 2

Scottmoose · 3rd November 2005, 10:11 PM

Quick translation:
-Line length: 55"
-Top and bottom are 80 square inches
-Driver centre mounted 19.375" from the top of the enclosure
-Port mounted 40" from the top of the enclosure (that's quite a way up -no criticism BTW, just an interested observation, I've learned something new again, which is great!)
-Port dimensions: 3" wide x 1" deep.
-Stuff the cabinet with something like Dracon, 0.25 lbs to the cubic foot.
-Place a 2.25 Ohm resistor in the positive lead from the amp going to the speaker. Alternatively, you could just use a higher resistance speaker cable. Go for it -this is good!

Best
Scott

rdf · 24th November 2005, 02:24 AM

Quote:

Originally posted by Scottmoose

-Place a 2.25 Ohm resistor in the positive lead from the amp going to the speaker. Alternatively, you could just use a higher resistance speaker cable. Go for it -this is good!

Or use SE tubes! =D
Is everyone working from TB's spec sheet or have you derived the T&S parameters? My pair are breaking in using a cabinet sized for the 657s and sound incredibly musical (if without bass) in the company of the above mentioned TBs and Jordans. Nice driver. Cold out of the box one measured an Fr of 75 Hz, the other 85 Hz. Just wondering what you're all finding.

Josephjcole · 24th November 2005, 11:12 AM

Fs 81.839996, Qms 2.121518, Qes 0.674866, Qts 0.511997
Mms = 4.18
Cms = .00090389
Vas = 4.11 liters

Fs 75.559998, Qms 2.049201, Qes 0.601340, Qts 0.464911
Mms = 4.13grams
Cms = .001074
Vas = 4.8 liters

This is what I got after break in for my pair. Mass added technique, for Vas
Joe

rdf · 25th November 2005, 01:43 AM

Thx Joseph! I'm surprised but not at all displeased by the highish Qt. There may be hope for a semblance of bass after all. Thx again.

fjhuerta · 25th November 2005, 12:30 PM

Actually, my bipolar towers (16L, tuned to 65 Hz) with the TB drivers have some very nice bass response. I was thinking about building a 6.5" bipolar TB subwoofer to go with the towers, but I don't feel the need to anymore. You may be suprised...

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3rd November 2005, 10:11 PM	#11
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Quick translation: -Line length: 55" -Top and bottom are 80 square inches -Driver centre mounted 19.375" from the top of the enclosure -Port mounted 40" from the top of the enclosure (that's quite a way up -no criticism BTW, just an interested observation, I've learned something new again, which is great!) -Port dimensions: 3" wide x 1" deep. -Stuff the cabinet with something like Dracon, 0.25 lbs to the cubic foot. -Place a 2.25 Ohm resistor in the positive lead from the amp going to the speaker. Alternatively, you could just use a higher resistance speaker cable. Go for it -this is good! Best Scott

24th November 2005, 11:12 AM	#13
Josephjcole diyAudio Member Join Date: Jun 2004 Location: Wisconsin	Fs 81.839996, Qms 2.121518, Qes 0.674866, Qts 0.511997 Mms = 4.18 Cms = .00090389 Vas = 4.11 liters Fs 75.559998, Qms 2.049201, Qes 0.601340, Qts 0.464911 Mms = 4.13grams Cms = .001074 Vas = 4.8 liters This is what I got after break in for my pair. Mass added technique, for Vas Joe

25th November 2005, 01:43 AM	#14
rdf diyAudio Member Join Date: Jun 2004 Location: big smoke	Thx Joseph! I'm surprised but not at all displeased by the highish Qt. There may be hope for a semblance of bass after all. Thx again.

25th November 2005, 12:30 PM	#15
fjhuerta diyAudio Member Join Date: Apr 2005 Location: Mexico City	Actually, my bipolar towers (16L, tuned to 65 Hz) with the TB drivers have some very nice bass response. I was thinking about building a 6.5" bipolar TB subwoofer to go with the towers, but I don't feel the need to anymore. You may be suprised...