Oh, that stinks. -72 dB THD+N at 0 dBFS would make converters from the digital dark ages around 1980 blush. I just added some to the list...Well, it’s not pretty:
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Fiio K11 R2R DAC/HPAMP measurements
This is a simple measurement of Fiio K11 R2R DAC and headphone amplifie. Some setup, 200kohm input impedance, 48khz sample rate, 20khz bandwidth. Balance ouput Dynamic range, No weighting 50mV SNR, 32ohm load, No weighting Linearity, 1khz sine, elliptic filter low and high pass from...www.audiosciencereview.com