/challenges-projects/project14/backtoanalog/b/blog/posts/riaa-pre-ampTimes are a changing! I just ordered 4 ciramic tube sockets and 4 shield sets ( two in blue, and two in red ). I was asked why the two colors? "Because I can." Was my answer hey right and left chanels. I have a older Sony cassette player, I think it en-USTelligent Community 12