amb Ɣ2 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 2. Tecnec 75R spdif cable 3. Single Ended cables Mogami 2964 1 meter with Amphenol RCA connectors 4. 100 Kohm load used for measurements 5. dScope analyzer sample rate 48 KHz unless otherwise noted 6. DAC 44.1 KHz sample rate, 24 bit depth unless otherwise noted 7. Audioquest Forest and Schiit Pyst USB cables 8. Vaunix Lab Brick USB hub 9. Shielded 14AWG and 16AWG power cables 10. A filter mode unless otherwise noted 11. Soft clip ON unless otherwise noted Measurements are made in accordance with AES17:2015 Measurements for record commenced after warmup of at least 48 hours. Measurements were performed over a period of several months. Index Post 1 - measurement setup description, highlights Post 2 - spdif input - SE RCA outputs Post 3 - USB ASIO input - SE RCA outputs Post 4 - Filter response part 1 - step response (square wave) Post 5 - Filter response part 2 - Imaging Post 6 - Anticlip feature Post 7 - External Power Supply Post 8 - Comparison with ODAC (Original Generation) Post 9 - reserved for additional data and corrections Notable highlights: Ɣ2 is one of the better WM8741 DAC implementations. spdif performance is decidedly better than USB. Very low distortion. Power supply noise spectrum is notably low for a SE output at -118 dBFS with spdif and external power supply. SE output Dynamic Range of 121 dB. SE output Cross-talk is approaching dual mono with > 125 dB isolation. Very low jitter, especially with spdif input. The AMB Ɣ2 preceded the ODAC by three years. Considering how NwAvGuy denigrated other DACs, the Ɣ2 embarrasses the ODAC both technically and in listening evaluations. See post 8 below for details. 2009 AMB Ɣ2 introduced 2012 ODAC introduced amb Ɣ2: Measurement setup example: Listening evaluation example: Ɣ2 is eminently listenable. USB implementation is dated, however spdif + external power supply allow the Ɣ2 to perform its best. A far better auditory experience than the Original Generation ODAC.