audio amplifier, close-up photo, audio equipment, digital controls, studio setting, inputs, function buttons, VX4, U-DISK, HDMI, VGA

audio amplifier, close-up photo, audio equipment, digital controls, studio setting, inputs, function buttons, VX4, U-DISK, HDMI, VGA
audio amplifier, close-up photo, audio equipment, digital controls, studio setting, inputs, function buttons, VX4, U-DISK, HDMI, VGA
Public Domain

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