long story short I got these from a girl who got them from her dad. I guess he died. I have barely used them and wonder if they are worth keeping for what I need. I have another pair of "cheap" dcm speakers already and I really only need 2 speakers for my music listening so I am thinking about selling these or upgrading the drivers if possible. I dont have much info other than the users manual I just found...all 2 pages info ...advice ....they are like new and 100 intact....#542 on one of them ..the other doesnt have a sticker.