Douk Audio P6 MINI Bluetooth 5.0 Tube Preamp Speaker Receiver Stereo Pre-Amplifier USB Player

Notes: The vacuum tubes have been replaced with the default 6K4 tubes. Please be advised.FeaturesMultiple audio inputs for different requirements: support Bluetooth 5.0 / USB(U-disk) / Stereo RCA connections, perfectly match with phonoes, TV, tablet, projectors, computers etc., support U-disk to play APE/ FLAC /WAV/ WMA lossless formats besides MP3; greatly improve the sound quality for your amplifier or active speaker.HIFI warm sound and replaceable tube design: default 6K4 tube to filter out the digital feelings and soften the sound to be warmer and sweeter, full and mellow with large dynamic; pluggable tube design, can be upgraded to 61N / JAN5725W / 6AK5 / EF95 for tube shaping and rolling and enjoy different sound styles.Separate tone control and input switch: besides main volume control knob, also with independent treble and bass knob to present amazing music with rousing highs and deep lows; with input selector and LED indicator, easy to switch input channel and show its working state, no need to plug cables again and again.Compact size and attractive appearance: CNC machined black aluminum alloy chassis, sturdy and durable; decorated with warm orange light from vintage tube looks great, provide different acoustic enjoyment even in limited space, very suitable for the audiophiles who pursue wonderful auditory and visual enjoyment.Warm TipsU-disk input is prior to Bluetooth, Bluetooth will auto disconnect when U-disk is inserted.ParametersAudio input: Bluetooth 5.0/USB(U-disk)/Stereo RCAAudio output: Stereo RCAMaximum capacity U-disk supported: 64GHighest sampling rate U-disk supported: 24Bit/192K (FAT32)Formats U-disk supported: MP3/APE/ FLAC /WAV/ WMATreble / bass range: ±6dBFrequency response: 20Hz-20kHz(±1dB)Distortion: ≤0.03%RCA input sensitivity: 0dBFS/1VSNR: ≥100dBWorking voltage: DC 12VDimensions(WDH): 9711833mm/3.824.651.30inPackage Dimensions(WDH): 25021565mm/9.848.462.56inNet Weight: 337g/0.74lbPackage Weight: 700g/1.54lbPacking List1P6-MINI Preamp26K4 Tube1DC12V Power Adapter1Bluetooth Antenna1User Manual