Here is an example FFT from the first warm-up run data collections, also highlighting the non-repeatable distortion spectrum for Loaner #13. This is one of the motivating factors prompting the second warm-up run. Loaner #13 dac2541 1 KHz distortion spectrum at 4 hours Loaner #13 dac2541 1 KHz distortion spectrum at 168 hours The two graphs above animated for visual differencing While the above focused has been on anomalies, it is extremely important to keep in mind most other measurements, spectrums, graphs, etc. demonstrated very little difference through the series of data collections from either the Lab unit or Loaner dac2541. The two behaved more similar than different. Here is an animation of THD+N vs Amplitude for the Loaner during the second warm-up data collection. dac2541-13 THD+N vs Amplitude warm-up No significant changes in THD+N vs Amplitude over 264 hours of data collection. This is just one facet of the enormous amount of data collected.