Interesting. Might be more useful to me than the Knowles Fox.
I just saw a video of someone having installed a sound decoder into Dapol's new 57xx and all the decoder sounds were quite good, but it seemed like the speaker could have been better, so since I have a 57xx on the way I'm looking at possibly installing sound in the future.
-Cody F.
I used this speaker in my VO-1000 and my RS-3 sound installs. Both sound great (to me) and honestly I think I would have used it in my GP7 and RS11 installs had I known about it at the time. The Knowles Fox fits and sounds great, but the Star Micronics would be an easier fit and I think gets about 90% of the sound quality of the Fox. I think this speaker is the same as (or very similar to) the Zimo 8x12mm "sugar cube" - they look identical to me - and the Zimo is $9 or so from dealers (though it comes with a molded enclosure that I always throw away).
If you haven't heard my RS-3's, here's the YouTube link:
http://youtu.be/4QVsPpiCLOUHonestly - if you're interested in doing sound installations in first-generation hood diesels (Atlas GP7/9, RS-11, RS-3, RS4/5, etc.), this is a great choice.
John C.