Nobsound NS-08E Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headphone Amp

Notice:
Please turn on the amplifier for about 15 seconds before you connect the audio source and put on the headset.
We recommend using 24~600Ω headphones, while armature earphones and headphones that have low resistance and high sensitivity are not suitable.
As there will be vavle 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
This is Douk Audio’s own brand, Nobsound. Nobsound features a low price coupled with high performance in a small, simple package delivering high fidelity, specially designed to provide the audiophile with the performance they deserve. Now we want to introduce you our newest preamp B07719G56B, which suits very well for this amp.
This unit can easily power high-performance headphones including the HD 580, HD 600, HD 650, K 701, K 702, Q 701, and many more. 24~600Ω headphones would be recommended and armature earphones are not suitable.
Package includes: headphone amplifier, 6J9 vacuum tubes (x2), and power supply.
Input and output audio jacks are both 3.5 mm. Please note, package does not include audio cables.
Replacement vacuum tubes include: E180F, 6ж9П, EF861, and 6688.