The A 20 Headphone Amplifier from Beyerdynamic is designed to drive up to 2 pairs of headphones whose impedance ranges between 30 and 600 Ω transparently, without coloring your source signal.
The amplifier has a discrete design and features gold-plated stereo RCA inputs. In addition to the dual front-panel 1/4" headphone outputs, the A 20 has a pair of stereo RCA outputs that are looped through from its inputs, allowing your signal to pass through without loss, even when the amplifier is powered off. The dual 1/4" headphone outputs are connected in parallel, and are both controlled by the front-panel volume knob.
Power amplifier of a discrete design in an all-metal housing
Two headphone outputs connected in parallel
Volume control for both headphone outputs
Looped-through input (hard-wired) to connect signal sources
(CD player, DVD player) and amplifiers
Internal wide-range switching power supply for worldwide use
Supplied with two different power cables
(1 x type E+F (CEE 7/7) and (1 x type B)