Dahlquist WFR-06VB04B 6.5" Poly Cone Subwoofer Driver - diyAudio
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Old 29th December 2009, 10:06 PM   #1
form109 is offline form109  United States
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Default Dahlquist WFR-06VB04B 6.5" Poly Cone Subwoofer Driver

well...i already have one of these on the way...and was wondering if anybody has one..and had Good Results with it?299-064_L.jpg
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Old 30th December 2009, 03:13 AM   #2
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Just a FYI - PE recently revised their advertised specifications on this driver - previously they had it rated at 7mm xmax - the revised amount shown on their site is now 5mm xmax
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Old 30th December 2009, 04:16 AM   #3
form109 is offline form109  United States
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Quote:
Originally Posted by Cokewithlime View Post
Just a FYI - PE recently revised their advertised specifications on this driver - previously they had it rated at 7mm xmax - the revised amount shown on their site is now 5mm xmax
Yes...ive seen that.....tis a pity..but they still look intreasting..

in this Case they are Basically the Same as the Daliquist Blue Poly Cone woofers...with diffrent specs of course.
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Old 30th December 2009, 05:42 AM   #4
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With only 5mm xmax, singly they don't model well as a sub - ok for a woofer.

If you go with multiples, ie: 4 or more, you can get reasonable LF extension - but IMHO for the same cost you could then just get better drivers more suited to sub designs
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Old 30th December 2009, 05:55 AM   #5
form109 is offline form109  United States
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Quote:
Originally Posted by Cokewithlime View Post
With only 5mm xmax, singly they don't model well as a sub - ok for a woofer.

If you go with multiples, ie: 4 or more, you can get reasonable LF extension - but IMHO for the same cost you could then just get better drivers more suited to sub designs
mhhhhh....well im not going for a Very High Output here....also the Apex Jr Super 8 has 4.9" mm Xmax...yet its still a Fairly Decent Sub...the Cone is 6.5" though...not 8"

i didnt buy the Driver for a HT Sub...but for music,for which it will be Perfectly Adequate.

i was going to go with the 7" DVC...it got sold out before i could get one...i think the Daliquist is better...lower FS and a Higher Excursion...5 Verses 3.5...

also consider im on a budget

Last edited by form109; 30th December 2009 at 05:57 AM.
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Old 30th December 2009, 06:53 AM   #6
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I think you're looking at Xmax a little too much. Many PA speakers have a pretty low Xmax, but the Xmech is pretty big. Most of them are played past Xmax anyway, but people don't notice because the sound isn't too bad.
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Old 30th December 2009, 05:36 PM   #7
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Quote:
Originally Posted by form109 View Post
mhhhhh....well im not going for a Very High Output here.... i didnt buy the Driver for a HT Sub...but for music,for which it will be Perfectly Adequate.
I guess it all depends on definitions - lol, To me a sub starts about 80 to 100Hz and has lots of output at that level and then extends significantly downward with a F3 somewhere below 20Hz.

The Dahlquist is not particularly sensitive or efficient and combined with the relatively small active cone area limits the ouput level that you can achieve with a single driver. However it models resonably well as a moderate to low output music woofer in a .653 ft^3 vented EBS configuration with a 2.5” x 12.75” port. You do get reasonable output levels and a F3 of about 37Hz within the xmax limit of this driver as illustrated by the attached WinISD plot.
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File Type: jpg DQWoof.JPG (105.2 KB, 364 views)

Last edited by Cokewithlime; 30th December 2009 at 05:49 PM.
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Old 30th December 2009, 06:14 PM   #8
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Did anyone notice the re is 8.9 ohms that's closer to what would be typical
of a 16 ohm driver.
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Old 30th December 2009, 06:31 PM   #9
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All the Dahlquist drivers currently on sale have a nominal impedance of 12 ohms - one of the reasons I suggested that if you are going to use them, use them in multiples rather than singly.
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Old 30th December 2009, 09:43 PM   #10
form109 is offline form109  United States
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Quote:
Originally Posted by Cokewithlime View Post
All the Dahlquist drivers currently on sale have a nominal impedance of 12 ohms - one of the reasons I suggested that if you are going to use them, use them in multiples rather than singly.

opps....i did overlook that....
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