I actually have precisely the same question, thanks to the author for posting! One more: will 50s need and amp, to play with an average phone?

Hello all. I hope you will getoften me right to the point, as I do have already a lot of doubts. I commute to work by train, then enjoy colleagues chatting. Want to isolated myself from it at least partially, to not to damage hearing, by making the sound louder. I often listen to speech...