音控有可能是耳機用的
http://www.luxman.com.tw/

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・The D/A converter of 2 compact channel PCM methods of the A5 documents size.
・I adopt product made in bar brown latest 32bit processing DAC tip PCM5102.
・I am equipped with a USB terminal (type B) and can input a USB digital audio signal from PC/Mac.
・The USB connection with the PC supports each OS standard driver after MacOS10 after Windows XP.

- Product Specifications

■ A form: 2 channels, D/A converter
■ Correspondence sampling frequency:

・COAX/OPT input: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
・USB input: 32kHz, 44.1kHz, 48kHz, each 96kHz ,※ 16 - 24bit 2ch PCM

■ Digital input: USB (type B), OPT, COAX
■ The digital output: COAX, OPT
■ Analog output: 1 RCA imbalance system (18mm pace), 1 headphones system
■ Line output voltage / impedance 2.1V/300Ω
■ Headphones output 130mW+130mW(600Ω), 80mW+80mW(32Ω), 40mW+40mW(16Ω)
■ Frequency properties: 2Hz - 60kHz (+0, -3.0dB)
■ Total harmonic distortion, the S/N ratio: 0.004%, 112dB
■ Consumption electricity 7W (the electrical equipment security method)
■ External form dimensions: 149(W) X 70(H) 2 ()(D)mm including front knob 14mm, back terminal 8mm)
■ Weight: 2.3kg
■ Accessories: Power supply cable