Vifa M22 info request - diyAudio
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Old 10th December 2003, 06:10 PM   #1
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Default Vifa M22 info request

Hi

The Vifa website doesn't show any info on the M22 WR-09-08 8" paper cone driver.

It's still available in Australia (with limited specs).

To those that have used it, could I have your opinion of it, please?

It seems like a good driver for a smallish box (<30-40L), with good power handling and good xmax (6.5mm?). Although, it's a bit more expensive than a lot of other 8" drivers in it's (apparent) class.

Thanks in advance.

Mos
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Old 17th December 2003, 12:32 AM   #2
cm961 is offline cm961  Canada
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I am also considering using this driver. I found specs for it at ApexJr but they don't closely match the specs I found elsewhere. Therefore I do not know whether I wish to use this driver or not. Also I wish to use a PR design but I don't know anything about them, and I just read some bad stuff about PR designs.

Pete
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Old 17th December 2003, 04:50 AM   #3
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Mos,

I have looked at this driver and wonder if it is really worth the extra over the 8" polycone. The only advantage I can see is that it looks better!!!

The M18 does look better than the P17 and has been compared to the venerable SS 18W at less than half the price. I don't know if the same can be said for the 8" version, but if so then it might be worth considering.

I suppose this is where the numbers don't tell the story.

The LDSG has some comments, and says many consider the poly to be Vifas best 8" driver.

LDSG

"P21WO-20-08, an 8" (21 cm.) PP cone woofer. There seems to be a consensus that his is the best of Vifa's 8" woofers. It has good, well-behaved extension on both sides of its passband."

Seas has a similar driver, I think it is a bit cheaper, worth checking out.

regards,
Paul
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Old 17th December 2003, 06:59 AM   #4
mcp is offline mcp  United States
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Default M22WR-09-06 specs

This is from Vifa Spec sheet.

Nominal Impedance = 6 ohms
Voice Coil Resistance = 4.3 ohms
Nominal Power (IEC268-5) = 150W
Music Power (DIN45500) = 200W
Operating Power = 7.5W
Sensitivity (1W,1m) = 88dB
Frequency Range = 30-1000 Hz
Free Air Resonance = 30 Hz
Voice Coil Diameter = 50mm
Voice Coil Height = 21mm
Air Gap Height = 8mm
Voice Coil Inductance = 1.1 mH
Effective Cone Area = 224cm sq
Moving Mass (incl air) = 36g
Magnet Weight (37.4oz)=1062g
Force Factor, B X L = 8.8Txm
Vas = 55 ltr
Qms = 2.73
Qes = 0.38
Qts = 0.33

Regards
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Michael Chua
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Old 12th December 2004, 03:39 PM   #5
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hi, mcp, i was just wandering, could you find any info about vifa m22wo-01 8'' 4 ohms model?
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Old 13th December 2004, 03:08 AM   #6
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http://www.d-s-t.com/main/index.htm
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Old 14th December 2004, 06:03 PM   #7
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Oh... if there was any info at the DST's site I wouldn't ask here...
Google doesn't know anything.
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Old 14th December 2004, 11:52 PM   #8
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You're right - it's not on DST's website or easily found via a google search, but here is a speaker which uses an M22 driver, so you might ask steve

You might submit a request here ...

Another alternative is to look at programs like WinISD and look at the parameters of very similar drivers. I found:

M22WR-90
M22WR-09-06
M22WR-19-04
M22WR-29
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Old 21st December 2004, 01:56 PM   #9
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Thanks a lot!
I think M22WR-19-04 will do
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