Soekris dac2541 technical measurements Standard Prologue If you are unfamiliar with audio measurements please use a search engine with the query: "audio measurements" or "audio measurement handbook" Look for publications by Richard C. Cabot and also by Bob Metzler, both from Audio Precision. There are other useful publications as well. These will provide basic knowledge. Interpretation of the following measurements is beyond the scope of technical measurements posts. The data presented were collected as follows: 1. PrismSound dScope III, picoscope 5243B, Cal Test CT2593-2 balanced probe 2. Tecnec 75R spdif cable 3. Balanced XLR cables Belden 1800F with Neutrik 110R AES connectors 4. Single Ended cables Mogami 2964 1 meter with Amphenol RCA connectors 5. 100 Kohm load used for measurements 6. dScope analyzer sample rate 48 KHz unless otherwise noted 7. DAC 44.1 KHz sample rate, 24 bit depth unless otherwise noted 9. Audioquest Forest and Schiit Pyst USB cables 9. Vaunix Lab Brick USB hub 10. Shielded 14AWG and 16AWG power cables 11. Lin (red) filter mode unless otherwise noted Measurements are made in accordance with AES17:2015 Soekris dac2541 Measurements for record commenced after warmup of at least 72 hours. Measurements were performed over a period of several months. Balanced measurements were performed twice, one month apart for consistency verification. Index Post 1 - measurement setup description, highlights Post 2 - AES input - Bal XLR outputs Post 3 - AES input - SE RCA outputs Post 4 - USB ASIO input - Bal XLR outputs Post 5 - USB ASIO input - SE RCA outputs Post 6 - Filter response part 1 Post 7 - Filter response part 2 Post 8 - Gain Staging part 1 Post 9 - Gain Staging part 2 and Jitter Attenuation Post 10 - reserved for additional data and corrections Notable highlights: dac2541 demonstrates excellent performance in a small package and a properly designed SMPS is nothing to fear. Very low distortion Power supply noise spectrum are at or below -160 dBFS in balanced output The power supply spectrum residual noise was so low it was necessary to reconfigure y-axis scale low enough to see the noise floor. Balanced output Dynamic Range of 126 dB Balanced output Cross-talk is dual mono with > 145 dB isolation Balanced output Gain Linearity is nearly perfect to -110 dBFS, less than ±1 dB to -130 dBFS Exceptionally low jitter Single Ended performance is slightly less than Balanced output, as is typical Single Ended performance is still exceptional compared to many competitor DAC SE outputs Well done Søren! Commentary: Power supply is at least 50% of any audio component's design. The higher the level of performance the more the power supply matters. Soekris recognizes this, enhancing dac2541's power supply, keeping noise to 100s of nanovolt levels while supplying 10s of volts throughout the system. Exceptional performance by design. Measurement setup example: Listening picture example: A time allocation dilemma occurs when components of such high caliber are in the lab for evaluations and measurements. Listening can become so involving as to lose track of time. In the blink of an eye an allocated time slot is consumed. dac2541 kept me immersed listening with various amps. Two favorites appear in the picture above.