Henry...You really have not clearly defined what about the sound you don't like with these "bad sounding CDs". Might help us towards what CD player. If they are just poorly recorded you may have to live with it. The tube player idea is interesting along with the EQ idea.
I would not dismiss cables out of hand. I am not talking about changing a cable permanently, just for the CD's you don't like the sound of. It has worked for me. I can't speak for those who say it won't work. I never assume something will or won't work because it is someone else's opinion. I always kick the tires myself.
For the cable route, if you (or anyone else here) wants to explore it... a very highly detailed and smooooooooth cable is the Van Den Hul "The First". If you can pick up a pair used, give them a try.. If is does not work for you, they sell really easy and you'll get your money back.
I would not dismiss cables out of hand. I am not talking about changing a cable permanently, just for the CD's you don't like the sound of. It has worked for me. I can't speak for those who say it won't work. I never assume something will or won't work because it is someone else's opinion. I always kick the tires myself.
For the cable route, if you (or anyone else here) wants to explore it... a very highly detailed and smooooooooth cable is the Van Den Hul "The First". If you can pick up a pair used, give them a try.. If is does not work for you, they sell really easy and you'll get your money back.