So, I've always loved the HBE but has anybody else noticed the latest version is very noisy? I get mad feedback when the master is higher than about 5. I used to crank it without much worry. I really love the way the new one sounds but when I get it to where I like it, it's nearly unusable because of the noise/feedback. I've gone back and forth with other models and none are near this noisy. Has there just been a change to master volume?