6J9 Vacuum Tube Front Signal Amplifier USB Sound Card Speaker Front Tube Audio Amplifier Computer USB Signal Input and 3.5mm External Device Signal Input Black

Parameters: Input power: >=1100mW(32Ω) Matched headphone impedance: 16Ω-200Ω THD: <0.005% SNR:> = 110dB Frequency response: 20 K Hz - 30K Hz Supported sampling rate: 16Bit - 32k Bit, 44.1k Hz, 48k Hz. Net weight: 398 g Weight with package: 498g Product Dimension: L98 mm X W 94mm X H 29mm Package dimension: L 200 mm X W 180 mm X H 55mm Packing list: 1 X Amplifier 2 X 6J9-J Vacuum Tube 1 X USB- PC Data Cable 1 X DC9V Power Adapter

• LINEPAUDIO 6J9 fancier-level HiFi Vacuum Tube Power Headphone Amplifier PreAmp, made of Beijing classic quality 6J9-J vacuum tube, USB-PC supported ASIO sound effect software will give out more professional, full, open-stage, soft and smooth sound, especially applicable to voice, string music, light music, and classical music, the performance of different frequency points is so perfect!
• Fine at high frequency, strong at low frequency! Easily drive 16Ω-600 Ω headphone of any class, quiet background without any current background noise! Two sets of audio signal inputs, one is USB signal input (USB-PC), USB cable is connected to PC, plug and play without a drive, directly used as an upscale USB external sound card.
• The USB port can be also connected to any model of Android mobile phones with OTG function. The other is 3.5mm interface audio signal input and you can connect it to mobile phone, CD, lossless music player or other audio source devices. In case of simultaneous inputs of USB signal and 3.5mm interface signal, 3.5mm interface signal input is preferred.
• This amplifier has three sets of audio signals, simultaneously output to meet the interface of different devices (RCA/3.5mm/6.35mm), the output end will deliver to you a real HiFi experience, whether connected to your upscale headphone or speaker, or used as a timbre adjustable PreAmp to connect your digital power amplifier, multimedia speaker or various stereo devices, what a real PreAmp.
• Many music fanciers are concerned about the background noise of vacuum tube headphone amplifier, but this product frees you from this concern, its performance in controlling background noise is extraordinary, the background is quiet after several tests and optimizations of the circuit design, without any current background noise, you will hear the purest, most natural, and most nostalgic sound.