Swissonic Quadphone, 4-Channel Headphone Amplifier, 4 Adjustable headphone outputs, 6.3 mm stereo jack connections, RCA L / R and 6.3 mm jack input, Mono-stereo switchable, Operation with external DC power supply, Max. Output Power: 4x 100 mW, Input impedance: 1 kOhm, Includes 12 V DC 500 mA power supply
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