This speaker sounds good, and meets its T/S parameters! However, due to the butyl rubber surround, it must be broken in for about 12 hours with a peak to peak excursion of 1/8 at a low frequency. (I used 19 Hz so I didn't hear it ) After that I put it in a small sealed box and it worked as predicted, and sounded good.
Rating:
[5 of 5 Stars!]