Nobsound Bluetooth HiFi 6J2 Vacuum Tube Preamplifier Stereo PreAmp Digital Treble & Bass Tone Control (Black)

Troubleshooting: Please note that this product is a preamplifier. It is not an amplifier and needs to be connected with an amplifier or active audio devices. Also, it is not a phono preamp and can't work with a turntable. For noise issue: 1.There is a large probability that the low-quality audio cable causes the static noise. 2.Please make sure the sound source is fine since tube amplifiers wil...