Generally anything between the source and the amplifier will suck the life out of the music.
I must differ. There's no life sucking here. Even with less decent tone controls, they usually give more than they take. Like @4425 stated, above, the Luxman tone controls are superb. I don't hear any of the previous tone control issues, so I have to believe Luxman doesn't have a lock here, but that other makers can also do good things with tone controls.