Testing

THD + Noise (at -3 dB FS)

The above measurements illustrate how much Total Harmonic Distortion and Noise is present in the devices output signal. Harmonic distortion presents itself as multiple odd and/or even harmonic overtones in the original signal.  Lower measurements are what we are interested in here and the Spitfire MKII DAC module produced very low THD+N measurements across the tested ranges

Intermodulation Distortion

The above graph shows the measurement of IMD.  This type of distortion results from multiple signals being mixed together and producing distortion in the form of overtones that are not harmonically linked to any of the base signals. Lower values are preferred for any type of distortion tests and the Spitfire MKII DAC module produced excellent results through the test sets.

Stereo Crosstalk

This graph is a measurement of the bleed-through effect from one stereo channel to the other. The lower the measured crosstalk values are the less bleed through.  In our test set the Spitfire MKII DAC module produced great results.  Indeed, some of the higher resolution results are off the graph.