JA-Baritone BK : Extremely Noisy

I recently purchased the Harley Benton JA-Baritone BK guitar, and I was extremely excited because it was my first baritone. After waiting about a week for it to arrive, I was pleased to find that it was clean and undamaged from shipping. The guitar was already relatively well set up and ready to play right out of the box, so I plugged it in to give it a try. However, I quickly noticed a significant grounding issue that resulted in a terrible squealing/hissing/humming noise that was louder than any other guitar I have ever played. This issue made the guitar virtually unplayable, and the noise persisted even when attempting to play riffs and solos. I believe this issue is similar to what Spectre Sound Studios has described with other guitar models, and it seems to be a widespread issue with these black hardware guitars. Unfortunately, I will be returning this guitar and requesting a refund. I cannot recommend purchasing this guitar until the grounding issue has been resolved.