Last year I purchased a new MXR Distortion + because I believe that was most likely the first pedal I bought in the late 70's and I had always liked the sound of it. Needless to say I was NOT impressed at all with the way they sound now. Kind of thin and mushy. A friend of mine (Jim) recently purchased an old Ampeg amp and they guy he bought it from tossed him a rather nasty and dirtly Distortion +. Jim had no use for it and gave it to me and told me the guy he got it from said it didn't work and he was just going to throw it away. So, I replaced the battery, plugged it in and WOW! I can't believe how much better it sounds than the 'New and Improved' ones. It's not as thin, not mushy at all and is actually quite articulate and sounds more fuzzy than the newer ones. :AOK The date codes on the pots put it at the 8th week in 1979 so it's pretty close to when I would have bought my first one. Anybody else using an old D+?