From what the OP said, that's exactly what he set out to do before the seller convinced him to buy the more complex system he didn't really want. Should we blame the OP for that?
Other than the protruding screw which might cause an interference in fit, I think Jorg delivered as promised.
IIRC OP claimed a box would be provided that would allow him to run 2 x 4 Ohm cabs at 4 Ohms, which is pretty much the argument here. But wait,
A serial box, which this is likely to be, would fit the above promise, with the only question being the protruding screw that @Passinwind pointed out. If Charlie says it's a problem, it probably is. That doesn't mean the box wasn't tested. Most testing is done before final assembly, although some final tests should be done after full assembly. Don't expect that kind of QC from a boutique company though, or the quality that is natural by mass production.Jorg then told me that he had developed a box that would enable me to utilize both 4 ohm cabs with an amp that could only handle a minimum 4ohm load, and that the box had been thoroughly tested and was trustworthy.
What happened between Jorg and OP? We don't know and I don't care. Not my money and I don't sleep with either (thank God).
We do know OP wrote off Jorg and Co. as a vendor. Won't buy, won't use, doesn't want the label on his stage. I respect that.
What we don't know is if Jorg wrote off the customer first. I also respect that too. Believe it or not, that is a thing. I've done it in a very, very word of mouth reputation sensitive industry, and only with careful thought and consulting with the VP of sales and my supervisor, the VP of Engineering. There are customers that just don't get it, and at some point the cost of dealing with them, free stuff, excessive support and service labor exceeds all profit margins AND the less tangible aspects like bad mouthing the company, upsetting employees, etc. I'm not saying this is what happened, or that the OP did anything to deserve this, but it does happen and it is an existential business decision. Many small companies have fallen from failure to make this decision correctly. Larger companies can absorb more and may or may not be more lenient. Smaller companies tend to dive into one or the other extreme, either being bad. Do what's reasonable.
OK, so you asked if we should blame the OP. Here's my question for you, hypothetical, not saying this is what happened. If Jorg already fulfilled his obligation, and the OP is just mystified by the complexity of speakon and can't figure it out, and he has the choice to refund the money to the OP and get back 9 month + old cabs that probably can't be sold at cost, maybe offer to replace the drivers at a huge loss, or make payroll to feed your beloved workers (they are in a small company), not to mention retain the investment in developing their skills, what exactly would you do? Another hint, not paying your workers is suicide.
If you don't mind, I'll take the liberty of asking a second question. Have you ever worked in a small manufacturing company or a service department? Not meant to be insulting, but it could change your perspective. Every time I go through a grocery checkout, I great the worker and treat them like a friend. They have a pretty bad job, and they don't smash my bread