DollaTek 6J3 Vacuum Tube Integrated Amplifier Mini Stereo HiFi Headphones Audio Amplifier DIY

• Low Ground Noise: Adopting microprocessor to control relay as output switch and low-noise power circuit setting in the machine, it avoids ON/OFF noise.
• Using aluminum CNC as the cover of the machine, it is high quality with scratch-resistant design.
• Large Drive Current: The special-designed power output makes a larger drive current.
• Tube Semi-Set Design: The tube is set half in the machine, putting the high-temperature part inside the item thus prevent customers from the thermal burn.
• Can direct replace tube model: E180F, 6ж9П, EF861,6688 etc. Can easy push HD650 / HD580 / HD600 / K701 / K702 / Q701 etc. headphone.

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 Package Contents 1 x DollaTek Headphone Amplifier 2 x 6J3 tube 1 x power supply ***Please note, package does not include audio cables.****"