Having finally got the JB humbucker working in my HSS performer strat it sounds just as muffled as the Shawbucker did. Id assumed it was the Shawbucker that was responsible for this dark sound. It was particularly bad for palm muted notes and harmonics, but the JB has the same problem. Even with tone control at 10 and every tone i try having treble turned up to 10 its still way too dark a sound. When i was installing it i noticed the tone cap for the humbucker was actually a 250k, as was the volume pot. Could this be why it sounds so dark compared to the JB junior in my previous strat? I had a luthier install that one so not sure whether he changed the pot to 500k or whether the JB junior is just more suited to 250k. Previous strat was an SSS this one is HSS yet the SSS with JB junior sounded much better than its big brother does. This sounds like a blanket has been thrown over the speakers just like the Shawbucker did.