To test the speaker out, I'll be using my version of the 18 Watt Lite 2b(ish), with the stupid simple master volume, and my reverb circuit.
First I'm going to break the speaker in a bit playing for a few hours, and then I'll record a demo with the speaker.
Then I'll switch the speaker cable over to the Red Fang and record more for comparison. No, they're not the same speaker, but I love the way the Red Fang sounds in that circuit, so it will be useful to see which I (and anybody watching) also likes better. If I had a different Greenback to compare to, I would do that as well...but I don't.

Their packaging and build quality look very good:
If things go as well as I expect with this speaker, I'm going to try out the 15 Watt 12" Black & Blue Alnico next. That would be a more direct competitor for the Red Fang, but has a lower wattage rating, which I prefer for this circuit. I want me some speaker breakup.

Thanks,
Josh