SUCA-AUDIO Tube-T1 Preamplifier, Vacuum Tube Amplifier Buffer Mini Hi-Fi Stereo Preamp with Treble & Bass Tone Control for Home Audio Player (6K4 Tubes)

Now we sold PHONO PREAMP in our store, you can visit Asin: B07QBXV3CG SENUCN-AUDIO had Changed to SUCA-AUDIO Brand from now on. Features: 1. Connect your mobile phone/ CD / Tablet / PC to the amplifier or active speaker. 2. Provide Warmth, Dynamic,Sweet tube coloration feeling with 2 6K4 tubes. 3. NO hum or buzzing, because of the optimal integrated circuit design and high quality power adapter. 4. Treble and Bass can be controlled, more delicate adjustment of the sound, much fun and high playability 5. NOT SUITABLE FOR PHONO OR TURNTABLE. Specifications: Power Supply: DC 12V/2A Frequency Response: 20HZ -20KHZ((3dB) SNR: 98DB THD: 0.1% Control?Potentiometer knob and toggle switch Treble adjustment range: 6dB Bass adjustment range: 10dB Audio Inputs/Audio Outputs: Gold-plated RCA Machine Size: 118.5*98*33mm(4.64 * 3.86 * 1.3 inch) Why there is a noisy and how to to? 1.Tubes. Check whether the tubes are plugged well on the tube sockets or not. 2.Your sound source. Check your input device and try other input sound source devices. 3.Poor quality audio cables or incompletely connection. Check if the cables are connected firm and replace a new audio cable. 4.Signal Interference. Devices like routers, mobile phones will also interfere in the audio signal and may cause static noise, keep away from the device like this. PAY ATTENTION: 1. This product is a pre-amplifier ! It is NOT a power amplifier, and does not have power amplifier function. 2. Low-quality audio lines will generate noise as a result. 3. The preamp cannot be connected to earphone directly. 4.Don't turn this preamp and post-amplifier in the max volume at the same time, or it will cause distortion easily. 5. Please make sure to connect the preamp and THEN turn the power on. Package: 1 x Tube Preamplifier 2 x 6K4 Tube 1 x Power Adapter