Vintage ROLA 4R midrange drivers - diyAudio
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Old 29th January 2013, 04:09 AM   #1
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Default Vintage ROLA 4R midrange drivers

I have 8 of these, 5 inch full range drivers, pleated paper surrounds and Alnico plug magnet; labelled 5 F 00 / 16 FOE; manufactured 1989
I thought they were 16 R and these are no good to me
I'll take the loss on these to get them out of the way before the missus finds out I spent $50-
$30- the lot plus postage
Will separate at $12 a pair plus postage

Were used by Australian Sound in a tall column speaker wired to 8R but I needed and wanted 16R drivers for this project
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Old 30th January 2013, 08:56 PM   #2
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Here are the pix
Probably only useful on a rebuild project but these do the "Telephone band" quite well as would be expected for a small PA speaker
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File Type: jpg 20130124_0138.JPG (181.8 KB, 54 views)
File Type: jpg 20130124_0139.JPG (193.7 KB, 50 views)
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Old 30th January 2013, 10:18 PM   #3
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5F 00 89 3/5

5F = Model 5F
89 - diaphragm type F89
3/5 = 3.5 ohm (also available in 15 ohm)

4.5 watts peak
Fundamental Resonance = 165 cps
Response = 160 cps - 6.5 Kcps
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Old 30th January 2013, 11:05 PM   #4
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Thanx Don
I was under the impression 89 was manufacture date, when would you say these were made then??
These boxes were 8R because 2 of the drivers in each box were disconnected, which was not what I was expecting. What's a fair price then??
The boss found out I got then and I am in serious trouble with SWMBO
They actually sound OK not brilliant but OK; very efficient and a rising response with a peak somewhere around 3 or 4 k from listening to female voice for a half hour
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Last edited by Moondog55; 30th January 2013 at 11:27 PM. Reason: Add second thoughts
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Old 2nd February 2013, 03:33 AM   #5
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I sent them to ebay at $15- a pair
Interestingly one box ( which I did not measure first) still had a line transformer in it and all the drivers in parallel
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Old 2nd February 2013, 05:01 AM   #6
VaNarn is offline VaNarn  Australia
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F 89 is the code for the cone specification and a guess for the manufacturing date would be anywhere between the middle 60's to the middle 50's.There is possibly a date stamp that is hidden on a gasket,perhaps, or on the line transformer.
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Old 2nd February 2013, 05:13 AM   #7
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Line transformers date is much later than that
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Old 2nd February 2013, 05:16 AM   #8
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I just did a sweep using Audacity and roll-off after 4k is steep
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