Those are the ones. I got them off their eBay store for the same price with free shipping. The filling is intended to be left in. Fiber filling makes the speaker act like it is in a larger enclosure which will enhance base. I left it in my enclosures. I can't imagine it makes much difference though in a speaker that small.
That same speaker and enclosure with a 1" tweeter in the top of the dash really improved the sound. I am just running it of a cheap aftermarket head unit too. With an amp it will be even better.
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