6K4 Vacuum Tube Preamp HiFi Stereo Audio Receiver NE5532 USB TF Card Music Player Headphone Amplifier WAV/APE/FLAC pcb assembly

Description
Audio input: Blth/Stereo RCA/U-disk/TF Card
Audio output: Stereo RCA / 3.5mm headphone jack
Supported formats of U-disk and TF Card: MP3 / WMA / APE / FLAC / WAV
Max storage of U-disk: 32G
Max storage of TF card: 32G
Tube model: 6K4*2
Frequency Response: ±3dB (20Hz-20KHz)
Treble/Mid/Bass range: ±6dB
Input sensitivity: 0.775V
THD: 0.05%
SNR: ≥98dB
Headphone Output Power: 100mW/32Ω
Matched headphone impedance: 16-64Ω
Working voltage: DC 12V
Dimensions(W*D*H): 115*128*33mm / 4.53*5.04*1.30in
Net weight: 420g / 0.93lb
Package weight: 700g / 1.54lb

Packing List
1 x P2 Preamp
2 x 6K4 Tube
1 x DC12V Power Adaptor
1 x Remote Control (without batteries)
1 x Bluetootn Antenna
1 x Manual