Experience superior sound quality with this 6J1 Tube Pre-Amplifier Kit, designed to enhance your audio system by effectively filtering digital flavor and delivering a warm, natural tube sound. Ideal for audiophiles and DIY enthusiasts, this pre-amp connects seamlessly between your sound source and amplifier, enriching music and human voice clarity for a more enjoyable listening experience. Key Features: · Warm and Natural Tube Sound: Utilizing 6J1 vacuum tubes (compatible with 6AK5, 6AU6, 5654), the pre-amplifier provides authentic valve audio characteristics that reduce harsh digital tones. · Clean Power System with Low Noise: Equipped with eight 470UF capacitors for excellent filtering, the power supply is designed to eliminate hum and noise. Filaments are powered with DC 12V connected in series, minimizing interference. · High-Quality Coupling Capacitors: Features electrodeless electrolytic capacitors that offer high-frequency response and low resistance, ensuring clear and distortion-free signal transmission. · Flexible Power Input: Uses a DC 5.5*2.1 socket compatible with an AC 12V transformer. The kit also supports direct wiring of AC 12V transformers without plugs by soldering the power cord to the circuit board. Note: DC power input is not supported. · DIY Assembly Kit: Comes with all necessary components, allowing you to build your own tube amplifier. Enjoy the process and satisfaction of assembling a high-quality audio device tailored to your preferences. Specifications: · Tube Type: 6J1 (substitutable with 6AK5, 6AU6, 5654) · Channel Type: Stereo (2.0) · Voltage & Current: AC 12V, 0.8A or higher · Power Interface: 5.5 x 2.5 mm plug · Circuit Board Size: 77 x 75 mm (3.03 x 2.95 inches) Usage Instructions: 1. Power Input: Connect AC 12V transformer via DC 5.5*2.1 socket or solder power cord directly if no plug is present. DC power input is not supported. 2. Audio Input: Connect to devices such as smartphones, computers, MP3/MP4 players, and other music sources. 3. Audio Output: Connect to the audio signal input of your power amplifier. 4. Volume Control & Power Switch: Rotate the knob clockwise to power on and increase volume; rotate counterclockwise to lower volume and click off to power down. Package Includes: · 1 x PCB Board · 1 x 2W 2.2Ω Metal Film Resistor · 6 x 1N4007 Large Current Diodes · 6 x 4.7K Resistors · 2 x 1K Resistors · 4 x 47Ω Resistors · 2 x 2.2K Resistors · 2 x 470K Resistors · 2 x 100K Resistors · 2 x 200Ω Resistors · 9 x 50V 470UF Capacitors · 4 x 50V 1UF Monolithic Ceramic Capacitors · 2 x D667 Transistors · 2 x B647 Transistors · 1 x 50K Potentiometer · 2 x 3mm Blue LED · 1 x DC005 Power Connector · 2 x Tube Base · 2 x 6J1 Tubes · 2 x RCA Base · 1 Set x Standoff and Screws · 1 x Potentiometer Cap This 6J1 Tube Pre-Amplifier Kit offers a fantastic opportunity to customize and enhance your audio setup with true valve warmth and crystal-clear sound filtering. Perfect for hobbyists who appreciate high-fidelity sound and the satisfaction of assembling their own tube amplifier.