Fleschler
"I know this could lead to another round of controversy, but multiple pressings of CDs can have variable audio quality from the same pressing plant, in other words, they don’t sound necessarily alike. There is no electrical or physical reason that I’ve found or my friend Robert has found, but the proof in the pudding, listening to one after another. One CD can sound brighter/duller/tonally richer/thinner, etc. than another or they may sound alike. I have two complete sets of the classical Mercury Living Presence CDs (as well as the boxed versions) in which many of them have tonally different sound, one set is generally brighter and more forward sounding and the other more rounded and less forward sounding. It’s a mystery as to why it is that way."
In the case of Mercury Living Presence CDs, I can think of several things that affect their sound, the single CDs or the box sets. One is that the Mercury Living Presence CDs are apparently in reverse absolute polarity. At least according to George Louis, the Polarity Pundit. I tend to agree with that assessment generally, given the lack of low bass performance compared to LP versions, for example, and a tendency to sound rather unfocused and whimpy and tonality incorrect. Also, the area around the spindle hole is usually solid metal, which degrades the sound, rather than clear plastic. A CD with clear center will sound better than the same CD with a metal center, all things being equal. A Drexel tool can be used to remove the offending thin metal disc around the spindle hole. Third, the iconic Black and White label is bad for the sound. Coloring the outer edge red and the inner edge black improves the sound of any Mercury Living Presence CD quite noticeably.
"I know this could lead to another round of controversy, but multiple pressings of CDs can have variable audio quality from the same pressing plant, in other words, they don’t sound necessarily alike. There is no electrical or physical reason that I’ve found or my friend Robert has found, but the proof in the pudding, listening to one after another. One CD can sound brighter/duller/tonally richer/thinner, etc. than another or they may sound alike. I have two complete sets of the classical Mercury Living Presence CDs (as well as the boxed versions) in which many of them have tonally different sound, one set is generally brighter and more forward sounding and the other more rounded and less forward sounding. It’s a mystery as to why it is that way."
In the case of Mercury Living Presence CDs, I can think of several things that affect their sound, the single CDs or the box sets. One is that the Mercury Living Presence CDs are apparently in reverse absolute polarity. At least according to George Louis, the Polarity Pundit. I tend to agree with that assessment generally, given the lack of low bass performance compared to LP versions, for example, and a tendency to sound rather unfocused and whimpy and tonality incorrect. Also, the area around the spindle hole is usually solid metal, which degrades the sound, rather than clear plastic. A CD with clear center will sound better than the same CD with a metal center, all things being equal. A Drexel tool can be used to remove the offending thin metal disc around the spindle hole. Third, the iconic Black and White label is bad for the sound. Coloring the outer edge red and the inner edge black improves the sound of any Mercury Living Presence CD quite noticeably.