Review on Adapter Vention Jack 3.5 mm F - Jack 6.5 mm M (VAB-S01-L), blue by Mateusz Praga ᠌

You need to stick the minijack into it to the end, and then pull it towards you a little, then only there will be a normal connection and sound. I bought this adapter at the same time as the DAC and for a long time I could not understand why this new DAC sounds so bad. I checked the DAC with large headphones and initially a 6.3 mm jack, it turned out that the problem was not in the DAC, but in this ridiculous adapter.