Nobsound Bluetooth HiFi 6J2 Vacuum Tube Preamplifier Stereo

Nobsound Bluetooth HiFi 6J2 Vacuum Tube Preamplifier Stereo PreAmp Digital Treble & Bass Tone Control (Silver)
- Notice: ① Preamplifier needs to work with amplifiers or active devices; ② Not PHONO preamp and can't be used for record players
- Vacuum tube preamp with Bluetooth; Convenient to improve your sound quality
- Audio signal input can be computer, CD, phone and lossless player; Three kinds of audio input: RCA; 3.5mm stereo input; Bluetooth
- Easily switching between different sound sources with its audio input selection
- Treble & bass adjustment; Sound is warm and broad; No background noise; Gold-plated for input and output terminals; 6J2 valve tube; Mini size suitable for desktop
Bluetooth Connection:
Some customers may find the Bluetooth can't be connected or found. Here is the solution.
1. Power off the M8 and your phone.
2. Wait for 5s and then power on both.
3. If it still can't be discovered, repeat 1 and 2 and it should work.
If the problem can't be solved, please visit https://www.amazon.com/sp?seller=ADPE7GPX91ORE and click "ask a question" to contact us.

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 will amplify all sound including the noise.
  3. Please check whether the tubes are plugged well on the tube sockets or not.
  4. Devices like routers, mobile phones will also interfere in the audio signal and may cause static noise.
- If your problem can't be solved, please feel free to contact us. We will be very glad to help you and try our best to make you satisfied.
Specifications:
- Audio input: 1 set of RCA input; 1 * 3.5mm stereo input; 1 * Bluetooth input
- Audio output: 1 set of RCA output
- Dimensions: 16*11.5*7 cm (including tube height)
- Power supply: universal 12V DC
Packing List:
- 1 * PreAmp
- 1 * Power supply
- 3 * 6J2 tube (one spare tube)
- 1 * Bluetooth antenna
Country USA
Binding Electronics
Brand Douk Audio
Color Silver
Label Nobsound
Manufacturer Nobsound
Model GFJ557_S
MPN GFJ557_S
PartNumber GFJ557_S
Publisher Nobsound
Studio Nobsound
ReleaseDate 0000-00-00

Country	USA
Binding	Electronics
Brand	Douk Audio
Color	Silver
Label	Nobsound
Manufacturer	Nobsound
Model	GFJ557_S
MPN	GFJ557_S
PartNumber	GFJ557_S
Publisher	Nobsound
Studio	Nobsound
ReleaseDate	0000-00-00

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

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