I also have two of these that have performed flawlessly for at least 5 years.
Must be bad run of connectors. Always amazes me that a company, maybe Peavey or maybe further upstream, can source from a different manufacturer and there is not a QA sampling from each new batch before its put into production.
I worked in manufacturing for 25 years, 5 of which were in Quality including being the QA Manager of a factory that produced over $1Million of product a week, and it frustrated the hell out of me that we were not allowed to staff to the level necessary to actually make sure all products were good when they left the factory.
In my career I had many example of situations where the cost of additional auditors, especially auditors in receiving inspecting incoming components could have saved us 10x the cost of same auditors in warranty.
Company was too cheap to pay the additional salaries up front , but later had to pay out exponentially greater costs in warranty claims annually that far exceeded the cost of hiring on more inspectors. Not to mention the hidden cost of poor quality: unquantifiable lost sales.