Wadia, Cary, Resolution Audio, Levinson, Birdland DAC has a volume control also if you wnat to go with a transport. I heard the Resolution Audio Opus 21 with a preamp and without, funny but it sounded the best with the CDP running through the variable output turned up to maximum and going into the preamp versus running the CDP throguh the fixed output and into the preamp, go figure.
Happy Listening.
Happy Listening.