There Are More Variables Than A Chip Set
Chip sets alone do not tell the whole story. It starts with disc handling, and older TOTL players have better transports than a mid priced CD player or a DVD player. With better disc handling and data reading, the machine has to do less error correction. Secondly, how does the player manipulate the data, and how is jitter dealt with. TOTL transports will induce less jitter at the data reading stage, so the player has less to correct. Also how is the power supply built? Mid priced CD players will compromise on the quality of the power supply, while the MAC will be well built. This has an effect on the digital stage of the machine, but also has a significant difference on the analog stage. Speaking of the analog stage, is the MAC a fully discrete output stage? Most of the mid priced CDP and all the DVD are going to use op-amps. While they may sound decent, they really don't seem to be the equal of a good discrete output stage. Finally, even the chassis is going to have an impact in the performance. If its less susceptible to vibration and other outside influences, its going to have a lower level of data corruption due to read errors.
I had a JVC XL-Z1050TN CDP for awhile, which I used as a transport. My DAC uses the Burr Brown PCM 1704 chip set, which is a multi bit design. It also uses fully discrete output devices, and it is easy to tell this DAC is superior in terms of sound quality any CD player I have brought home.
But one night I decided to run the JVC as a stand alone player. This machine was a TOTL player in 1991 or so, with a MSRP of $800. It performed admirably well. Not as good as my DAC, which sells for 2.5K, but still it did a nice job. I could listen to it all evening, and enjoy it.
In regards to the MAC CDP, I would have it serviced if it wasn't too expensive to do. I bet it would make a nice transport at the very least, and still be a viable stand alone player.
Of course this is just a barnyard animals opinion. If you want another go ask the cows. Don't ask the chickens, as fowl cannot be trusted to tell the truth.
Regards
Mister Pig