Originally Posted by Lotus 7
The frame and magnet look very similar to the Chinese "Technical Pro" 18 inch woofer
, although the rear magnet cover is different. It's possible that your speaker has a smaller diameter voice coil judging from the dust cap. If it does have a smaller diameter voice coil, it's likely the maximum power rating is also lower.
It looks similar but I think there are too many differences. Smaller, aluminum dust cap. Smaller voice coil (I estimate 2.5"-3" max), cone looks to be made of a different material and is not ribbed like that chinese woofer. And the magnet. =/
Another hint is that I've had this cab for over 15 years so it's most certainly not a modern woofer.