Subwoofer Enclosure

Yeah, I assume it's got typical specs for the most popular size boxes for a given frame size, just don't know them unless the popular JBL subwoofers back in the past ~ decade some have used for THs still apply.
 
Yes long term bench testing .

And for right now I have about 10 smaller amps I need to fix .

The only reason I’m using a smaller sub right now is my shop is getting some remodeling done on it and need to move the large subwoofers I have out of the way .

I was gonna use this sub as a test sub and set it up on my bench instead of being on the floor like I have the other larger subs for testing
 
Why not use dummy loads for bench-testing? If you want to monitor the audio, you can use a full-range home speaker in parallel with the dummy load. Reduce the signal going to the home speaker by inserting a resistor or incandescent lamp (my preference) between the dummy load and the home speaker.
 
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This mobile audio sub driver looks/specs basically the same as yours, so using its specs for a max flat (0.707) sealed = ~22 L or short of measured specs might be best to use the IB's 10x Vas rule-of-thumb (ROT) = ~32.3 L. Either way it's going to roll off around its actual Fs, which with a stiff suspension is typically a lot higher till broken in.