Preamplificador de tubo de vacío HiFi Bluetooth 5.0 receptor estéreo amplificador de auriculares reproductor USB

1 x A9 Preamp. U-disk supported formats: MP3 / WMA / APE / FLAC / WAV etc. Audio output: stereo RCA / 3.5mm headphone jack. Max headphone output power: 100mW(32Ω). Matched headphone impedance: 16-300Ω.

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