The Tubadour V has no volume control, the VI does. Many dacs have volume control. The ones that do usually state that if you set the dac volume to max, it will bypass it. Doing so with my preamp/amp combo, it ends up being too much volume. Meaning I have to set my preamp volume well below 9 o'clock to get the volume I like, and it is not desirable as preamps perform best between noon and 3 o'clock. It's all system dependent.

