John's comment is well-founded with respect to many pop CDs. Fortunately I've found that with the classical CDs that I listen to remastering is beneficial in many(most?)cases. Just one example would be the RCA Living Presence items from the 50s and 60s which have been remastered in connection with SACD, and sound very good, SACD or regular CD.

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Enjoy the music, not the equipment.