yah, gotta love itunes random , but I leave itunes playing continuously, I don't listen to everything that gets played. I'd skip any beatles that came up while I was paying attention.
What I appreciate about the beatles is they managed to sell a shitload of crap to a bunch of people. Then later, they wrote some ok stuff, but none of it reached the level of genius.
Pretty sure you'd want to attenuate the output, not the input. You want the amp to have as much to work with as possible, without overloading. Since overloading the B22 input is pretty unlikely, you'd want to do the attenuation later.