My Cosmos ADC is A-grade and set to 3.5 Vrms. All RMAA measurements are 24/192KHz.
TLDR: The THD performance of DX7 Pro+ is great at -1.0dBFS but worse at -1.2dBFS. All ESS DACs have this "oscillating THD" issue (see https://archimago.blogspot.com/2022/07/hi-res-thdn-vs-output-level.html)...
So I bought DX7 Pro+ out of curiosity and measured it using Cosmos ADC (grade A).
Note: Here Cosmos ADC is in stereo mode so the noise is not the best. But I care more about harmonic distortions :) My Cosmos APU will arrive tomorrow and then I will measure them again.
THD of DX7 Pro+:
THD of...
Although I mainly use DAVE for my PSI A17, its headphone output is especially good for IEMs. I find Monarch MKii a great match (no EQ needed :) this is very rare).
Here is a low imp. IEM (Senn M2I = 18ohm, good for testing because of its low unit-to-unit variations) at -13dBFS (Cosmos set to...
FYI I measured my DAVE using Cosmos ADC :) The performance is quite decent (not D90SE level though lol) and without artifacts.
https://www.audiosciencereview.com/forum/index.php?threads/chord-dave-measured-by-cosmos-adc.32504/
Hi guys. I measured my Chord DAVE using Cosmos ADC (grade A). Cosmos is set to 4.5Vrms in both XLR and RCA measurements.
Note DAVE has a HF filter which affects the FR and probably cause the rise of IMD after 18kHz. I will remeasure it later without HF filter.
DAVE has higher noise and...