This is the silver 10Y line stage which is used with the recently featured silver D3a phono stage.
The Line Stage has 2 balanced inputs for Phono and DAC and two Single Ended inputs.
The balanced inputs use input transformers to convert to single ended for the internal circuit. In this case these input transformers are silver wound as well. The input transformers can be wired for additional gain if wanted. They can be 1:1 (no gain) 1:2 (+6dB) or 1:4 (+12dB). This will then add to the 6dB base gain of the line stage.