Sonodyne HI-FI SO-501 OFS 8ohm 25w

[Steve West]

I have 8 of these speakers but I don't know anything about them. The two I tested sounded great. The only thing close to information on them that I was able to find was that they are the predecessor to the 505, but I'm not sure if that is accurate.

Can anyone help me out with info on these drivers?


Thanks
-Steve