Every aspect of the A20 bespeaks quality, from the brushed aluminum housing with seamless construction to the ALPS potentiometer that allows variable volume control. The internal circuitry is modeled after Beyerdynamic’s top of the line A1, so you can count on the quality of its output. Speaking of which, you have your pick of two headphone jacks in front, as well as an analog RCA output in the back, letting you listen with a friend or keep multiple pairs plugged in, just in case.