My Benchmark Media Systems DAC3 HGC is installed and sounds great. I decided to move the jumpers to -20db so my Musical Fidelity integrated amp volume control goes from about 9 o’clock to 11 o’clock. This jumper setting seems to be working okay. Based on your equipment, you might have to experiment.
I have owned the Benchmark DAC3 HGC for several months. After several weeks, I found it to be very musical and like it very much.