First, a few notes. This was via SPDIF/BNC, from the Soundaware D100, which has been great with my other measurements. My measurement methods were consistent from the other DACs I've measured on SBAF. I had to turn the gain up a bit on my ADC, which can raise the noise floor, but to minor levels. Lastly, I tried all sorts of jumper/DSP variations. Any oddities seen in these measurements were generally shared across various jumper settings. Measurements were taken with default jumper setting (i.e. all of them removed). 1KHz, -3dB, 16/48. Harmonic distortion results could look better. This is a bit high. However, that doesn't concern me. I've heard DACs with similar distortion that didn't seem to affect the sound subjectively. What concerns me is the skirting around the 1KHz area and additional noise in that area and in the lower end. Ideally, the noise floor would be flat, and the 1KHz would be a single line rising out of that, top to bottom. Same as above, just extended to 48KHz. Same 1KHz signal, but showing the 1-1000Hz region. While the noise floor is fairly low overall, you can see some spikes in the area as well as weird artifacts around 1KHz. The spikes in the lower area are consistent in most measurements. Usually you want to see this be very clean in DACs. 1KHz down at -60dB. Again, harmonic distortion could be better, but this is a common 16-bit result, I suppose. Noise floor is about as low as the ADC will go. Cleaner looking area around 1KHz. Still, some noticeable noise in the lower end that gradually decreases until subsiding around 3KHz. This noise could affect the resolution of low-level signals, possibly. Something odd I noticed. This is the sine wave view of that 1KHz, -60dB signal. You might see the wave has some wiggle spots in it, some narrow and some broad. I've not seen this before on a -60dB signal. Weird.