Bruce Brown from Puget Sound Studios did an interesting test of 5 A to D converters. This was a DSD comparison. He put the files blind on his website and people downloaded and listened. The thread is long, but interesting to skim through. He provided files from a Merging Horus, Grimm AD1, EMM Labs ADC8, Korg MR-2000(modded) and a Tascam DS-3000. There are some passing very positive comments on the Aye QA-9. There are lots of opinions, but the Merging and Grimm generally came out on top. The Tascam was generally on the bottom. Clearly in this test, price mattered.
Bruce Brown Comparison
Bruce Brown Comparison