Benchmark Media Systems, Inc.
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THD+N vs. Frequency at –3 dBFS
The above graphs demonstrate that the THD+N specifications for the DAC1 are not frequency dependent (the
variation from 20 Hz to 20 kHz is very slight). Note that at worst case, the distortion is 109 dB less than the – 3
dBFS test tone (and 112 dB less than the full scale output of the DAC1). This implies that the distortion created
by the DAC1 should be below the threshold of hearing unless playback levels exceed 112 dB peak SPL.
Distortion should still be well masked at higher playback levels.
