Beyerdynamic A20 Headphone Amplifier - Silver Reviewhttp://is.gd/fJBOzk Beyerdynamic A20 Headphone Amplifier - Silver ALPS potentiometer for variable volume control, Internal wide-range switching power supply for worldwide use170 mW / 250 , high-gain RCA input, input signal can be looped through, entirely free from signal-loss thanks to the hard-wired RCA outputT.H.D = 0.01 % at 170 mW / 250 , Elegant, wrapped screwless solid all-metal housingAudiophile grade, suitable for all headphones up to 600 OhmsMade in Germany with 2 year Warranty
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