I'm just going to state up front this is all in my experience. Others may have different experiences and that's OK but these are mine.
I/We compared the W4S Dac 2 and Bryston using toslink, spdif, and USB with a Mac and PC as source. The Bryston USB is not it's strong suit but then it came out 2 years ago so that's to be expected. If you are committed to connecting your Dac via USB I would not suggest the Bryston; however I have never heard a USB Dac, asynchronous or otherwise I thought was terrific compared to any other connection method. Everyone keeps touting their new USB module but I have not heard one yet that I think is any good, and I have heard a lot of Dacs in the last 6 months. I strongly believe USB robs the music of emotion, and dynamic range.
Next in my experience using a Dac without a built in volume control and without a preamp will work fine. Just use the digital volume control in your music player software.
However I recommend using a preamp.
I/We compared the W4S Dac 2 and Bryston using toslink, spdif, and USB with a Mac and PC as source. The Bryston USB is not it's strong suit but then it came out 2 years ago so that's to be expected. If you are committed to connecting your Dac via USB I would not suggest the Bryston; however I have never heard a USB Dac, asynchronous or otherwise I thought was terrific compared to any other connection method. Everyone keeps touting their new USB module but I have not heard one yet that I think is any good, and I have heard a lot of Dacs in the last 6 months. I strongly believe USB robs the music of emotion, and dynamic range.
Next in my experience using a Dac without a built in volume control and without a preamp will work fine. Just use the digital volume control in your music player software.
However I recommend using a preamp.