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In the measurements section of the review of the Cambridge, you noted that "Overall, the Cambridge Edge A offers superb measured performance in both the analog and digital domains." You also determined that its DAC had resolution of around 18 bits, which seems perhaps low by current standards. Could you please comment on to what extent the difference in resolution between, say, 18 bits and 20 or 21 bits would be audible? And to what extent does this measurement of resolution factor into your determination of overall excellence in measurements?
In other words, how desirable is it to seek out DACs with 20 or 21 bit resolution?