PDC - XM6 DAC Choices Help

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Help: Which DAC should I choose?

You have a choice of three different DACs for the XM6. All DACs are built by Wolfson Microelectronics.

DAC	WM8740	WM8742	WM8741
Price	+$0	+$20	+$42
Resolution	24 bit	24 bit	24 bit
Sample Rate	192 kHz	192 kHz	192 kHz
Published SNR	120dB	126dB	128dB
Published THD	-104dB	-100dB	-100dB

All three DACs have excellent audio performance. If you are relatively new to the headphone amplifier environment, or are looking to save a few dollars, we would recommend the WM8740 - it has very strong specs, and indeed edges out the others very slightly in THD performance.

The WM8741 and WM8742 are slightly newer chips from Wolfson, and similarly have excellent specs. If you are a headphone veteran, or experimenter, than by all means choose one of these upgrades.

For the truly hard-core, we've linked to Wolfson's product pages for each of the DACs. From here, you can download the Engineering datasheets for each:

WM8740: click here.
WM8742: click here.
WM8741: click here.