yes, they're 8zed, and they're 10's
I bought them for a decent home theatre sub bass setup, but wanted to run them in so I could measure the t/s specs properly, to design some tapped horns properly.
and there was a car show coming up, so I combined the two, and made a removable enclosure for my little hatch back.
then we just chucked the box into "the van" and it did 151+dB
quite a few different cars here from a recent competition, the van is in it somewhere: