I connected the DAC directly to the amp and listened for a couple of hours. I strongly prefer the sound with the preamp. With the preamp, the music is simply more musical, detailed, and effortless. Trying to get a home audition of a decent transport to hear if it makes a difference in my system. In addition, I'm going to listen to a couple preamps and compare them to what I hear when I change transports. I'm really trying to determine the best way forward. I only want to spend 3-4K.