Nobsound NS-08E Vacuum Tube Headphone Amplifier Hi-Fi Valve Headphone Amp Stereo Audio Preamplifier

Notice:
Please turn on the amplifier for about 15 seconds before you connect the audio source and put on the headset.
We recommend using 24~600? headphones, while armature earphones and headphones that have low resistance and high sensitivity are not suitable.
As there will be tube Microphone effect, please keep the amplifier steady while using it.
For noise issue, please keep it away from devices like routers, mobile phones or something that may interfere in the audio signal.
If there are no interference, please remove all input and listen to see if the noise still exists. If so, the device may be defective and you can contact us to get support.

Specifications:
Output power: ?1100 mW (32 ohm)
Headphone Adapter Impedance: 18-600 ohm
Total harmonic distortion: <0.005%
SNR: ?110 dB
Frequency Response: 20 Hz - 30 kHz
Size: 111*69*32 mm / 4.37*2.72*1.26 in (Height: 73 mm with vacuum tube installed)
Net Weight: 185 g / 0.41 lb
Power supply: Input voltage: AC 100-240V 50/60 Hz; Output voltage: DC 6V 2000Ma

Full List of Replacement Tubes:
6J1, 6?1?, 6AK5, 6BC5, 403A/B, 5654, EF40, EF95, CV850, 6J2, 6?2?, 6AS6, CV2522, EF11/732, CV4011, 6J3, 6?3?, EF96, CV848, 6BC6, 6AG5, 6J4, 6?4, 6136, 6BX6, 6AC7, EF94, 6AU6, 6J5, 6?5?, EF80, CV2521, 6F36, 6AH6, 6AN5, 6K4, 6K5, 6K4?, 6BA6, 6DA6, EF89/93, 5749

Packing List:
1 * headphone amplifier
1 * power supply
2 * 6J3 vacuum tubes