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Old 16th December 2002, 10:52 AM   #1
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Default Vifa Woofer naming scheme?

Vifa woofers seem to use this kind of a naming scheme

series, P=classic poly, M=classic (coated) paper, PL=premium line, MG=glass fiber line, TC=cheap line ...

external diameter in cm

W = Woofer or S = shielded device

x = H, O, G, K, R = what is this???

- = dash

two digit number, 08 or 09 seem to be numbers for parts in the general Vifa program, whereas higher numbers seem to be primarily for OEM parts -- is there any system to these numbers?

- = dash

impedance = 04, 06 or 08

example
PL18WO-09-08

So the things that bug me are the letter after the W and the two digit code coming after that.

I have not been able to correlate them to VC former material, size of magnet, type of surround or anything.


Puzzled,

Eric
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Old 16th December 2002, 02:48 PM   #2
AGGEMAM is offline AGGEMAM  Denmark
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Default Re: Vifa Woofer naming scheme?

Quote:
Originally posted by capslock
x = H, O, G, K, R = what is this???
It is the drive system ! Including the magnet size and voice diameter !
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Old 16th December 2002, 02:51 PM   #3
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Thanks. Any idea as to what those might mean specifically?
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Old 16th December 2002, 02:57 PM   #4
AGGEMAM is offline AGGEMAM  Denmark
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Quote:
Originally posted by capslock
Thanks. Any idea as to what those might mean specifically?
By looking thru their datasheets you'd find out, but here is what I have already found out:

D = 20 mm VC, 210 grams magnet
G = 25 mm VC, 240 grams magnet
H = 25 mm VC, 415 grams magnet
J = 32 mm VC, 415 grams magnet
O = 40 mm VC, 700 grams magnet
R = 50 mm VC, 1050 grams magnet

I'll check it out to find more ...
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Old 16th December 2002, 03:03 PM   #5
AGGEMAM is offline AGGEMAM  Denmark
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Here are some more:

X = 76 mm VC, 240 grams magnet
C = 25 mm VC, 10 grams magnet (Neodynium)

K = 25 mm VC, ?? grams magnet (my guess is 210 grams)

Please note, that the TG, TC, and Classic lines doesn't completely follow the rest of the speakers in that the

D = 20 mm VC, 105 grams magnet (TC, TG or classic line only)
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Old 16th December 2002, 05:30 PM   #6
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Thanks Aggeman,

I guess its the classic line that threw me, as I have a 21WO that has a dual magnet, and another one the has only one very tiny magnet.

A quick check of some of the XT, MG, PL woofers confirmed your scheme.

Any ideas what the numbers after the letter mean?
The 09 seems to be the standard basket for XT, PL, MG lines, 49 the plastic basket for the TG line. However, I have no idea how the basket for the XG18WH00 would be different from that of the XT18WH09...

I think the 39 are usually the non-standard (OEM) versions that have a basked with flat edges, like the Peerless HDS series.

Regards,

Eric
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Old 16th December 2002, 05:59 PM   #7
AGGEMAM is offline AGGEMAM  Denmark
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Quote:
Originally posted by capslock
Any ideas what the numbers after the letter mean?
I'm not totally sure that VIFA actually knows, or at the very least I can't make sense of these numbers ... so your guess is as good as mine.

Please post it, if you do make sense of it !
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Old 30th January 2003, 06:58 PM   #8
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Default Vifa date codes?

Current parts seem to have a six digit number that is actually the production day.

Very old parts have the year as a two digit number, i.e. 86.

In between, they used three digit numbers. My T+A T160E, which I think I bought in the summer of 96 when the line was stopped, has drivers with codes 505 and 506, so I assume this means May/June 1995.

I recently bought some M25WO-47 that have the date code 903. Would this be 1989 or 1999?
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Old 31st January 2003, 11:25 AM   #9
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Found another driver from a speaker that was purchased in 1990, driver is marked 903, so 9 seems to stand for 89.

Current production has 5 or 6 digit numbers. Anybody understand that system?
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