|Niobium speaker, maybe.|
This speaker is sold as a "600W Niobium Car Stereo Tweeter". I'm not sure what the 600W means: Surely not 600 watts, which would instantly fry the poor thing. I'm also not sure what the niobium in the name means: If there's niobium in there I sure can't find it. Ah well, at least it was cheap.
Source: eBay seller caraudiosupply
Contributor: Theodore Gray
Acquired: 1 May, 2004