ProCo is a legit enough company--they're big and they've been around a long time, and while they're not exactly known for making boutique-grade, 'high-end' cabling, they wouldn't survive that long if they ripped off their customers--MI-types and music merchandisers--with bogus connectors. Not to mention that Neutrik themselves wouldn't sell to them if they were ever caught using the counterfeits, and Neutrik supplies the industry a whole lot more connectors than just the SpeakOn line. I think the biggest concern about counterfeits should be when buying loose connectors for making your own cabling; you HAVE to buy from a known source like Parts Express, Mouser, etc. People known to actually sell Neutrik connectors...if you just buy from some unknown source on Amazon, I think you're running some risk of getting fraudulent connectors. At least, so I'm told...I've never encountered a fake NL4 my own self, but I've heard or read plenty of accounts from people whose opinions I trust.
And while I trust that
Sweetwater wouldn't carry a product that has a bogus Neutrik connector, I must admit that my faith in them as an online marketer has been somewhat diminished by reading their glowing recommendation of the superior sonic properties of that $88 speaker cable.