Hello, I have a Fender MIJ PB62-70US, Fender Rumble 800 combo, and I recently purchased D'addario chromes. However, I find they sound very bright despite being flats. I can't get them to sound like the flats in this video or pretty much any video that uses flats... I find the E string especially sounds too bright and trebly... do I just need to get darker sounding flats (like La Bellas?) Thanks in advance.