Once you improve the things that need it there's no fiddling to them...Set the volume on the Amp at a level that is slightly above what the max you would normally use and then control volume further with whatever device you are using...In my case the computer...Sound is great...Way better than just plugging headphones directly into my FIIO E10 DAC (I use the FIIO E10 to pass audio from the computer to another FIIO Fiber converter DAC at the TV...I use the COAX OUT from the E10 to the COAX IN of the FIIO fiber converter at the TV. The FIIO fiber converter has a switch on it so I can switch between the Coax Digital signal coming from my computer to the Optical output coming from my TV then it goes from the Fiber Converter to the P-1 Tube amp via RCA output. Works great. Using Audio Technica WS-99 headphones...VERY nice sound and like I said a lot better sound than just plugging directly into the E10 DAC directly at the computer. I like mine so much after I upgraded the power supply and tube that I will buy another should it fail in the future.