JBL C50 Olympus Serial Numbers

[henflet]

Can I determine the year of manufacture of Olympus speakers given the speaker serial numbers 46499 and 46500. I am going to sell a set and want to provide proper information. The speakers have a single bass and two lenses above. Thru one lens I can see the bullet tweeter (075 ring radiator?), but I can only see a horn mouth thru the other lens. Is there a way to positively determine it is a 375? Since these cabinets predate the passive radiator, is that a means of determining the year of manufacture? Is there an easy way I can upload a photo of this system for your analysis? Thanks from a Newbie (first post).

[yggdrasil]

Use manage attachments when writing a post for uploading pictures.


The throat of a H93 horn will be 2" wide.

[henflet]

Thanks for the reply rggdrasil! Regarding the 2" throat (driver outlet?) for 375's, I can only view the horn mouth (horn outlet?) by looking up into the lens. The diameter of the mouth is about equal to the height of the lens. Please see photos.

[Zilch]

I see in the site library that Olympus was offered without the passive radiator through 1964.

I see blue paint on the horn, I believe. If the drivers are also blue, that would make them "early."

We cannot tell from the serial numbers because those records have been lost.

You'll either have to remove the lens or the woofer to determine whether the MF drivers are 375's....

[pelly3s]

hmmmmm why the lens over the bullet

[Zilch]

hmmmmm why the lens over the bullet

Owner perceived it as "Beamy," perhaps?

[henflet]

Zilch, thanks, I will remove the lens as you suggest. I assume I can then peer down the horn and measure the throat diameter of the driver. Can't get to the speakers till the weekend - they're stored 80 miles from here..

pelly3s, I have no idea why there is a lens over the bullet - is that unorthodox?

Sorry for all the questions, but this is new to me. Must I remove the woofer to determine if the driver is painted blue? If I did remove the woofer from this sealed(?) enclosure how would I reseal the cabinet when I reinstall the woofer (gasket, caulk etc?) If the driver is painted blue, does that add extra rarity, character, or value to these speakers? Here's a picture of the "Bullet" driver. Does it look as expected (like 075)? TIA