How does the sound of the Uno compare to the Dohm Classic? May 12, 2020 15:43 The single speed Uno has a sound comparable to that between the high and low setting of the Dohm Classic. Related articles What is difference between the Dohm Classic and Dohm Natural? What is the difference between the Rohm and Hushh? Why does my Dohm have a different label on top than my old one? What is the difference between the Dohm Uno and Dohm Classic? What is the energy usage for the sound machines?