In the past, CAL was very good and easy to deal with. I do know that the company has undergone quite a bit of internal "shake-ups", so things might or might not be the same now.
As to doing the upgrade, it will result in a more spacious and open sound with greater detail. You will lose some of the warmth and "intimacy" that the 16 bit DAC offers though, so keep this in mind. Sean
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