DIY 6JI Tube Preamp Amplifier Board Kit – Vacuum Tube Stereo Hi-Fi Preamp for Music Enthusiasts

Bring the warmth of tube sound into your audio setup with this DIY 6JI Preamp Amplifier Board Kit. Designed for music enthusiasts, this kit lets you assemble your own stereo tube preamp, giving digital music a warmer, natural valve tone with enhanced vocals and smoother instrument response.

Featuring two 6J1 vacuum tubes (compatible with 6AK5, 6AU6, 5654, etc.), high-quality capacitors, and clean power filtering, this preamp kit reduces digital harshness and delivers classic analog warmth. Perfect for pairing with your favorite power amplifier, speakers, or headphones.

Key Features:

• 🎵 Classic Tube Sound – Filters digital harshness for warmer, more natural tone
• ⚡ Clean Power System – Eight 470µF capacitors for low-noise operation
• 🔧 DIY Assembly Kit – All components included; no pre-soldering required
• 🎚 Volume Control – Smooth rotary knob with built-in power switch
• 🔌 Flexible Power Options – Works with AC 12V transformer (socket or wired input)
• 🎶 Stereo Preamp Output – Connect to amps, speakers, or audio interfaces

Specifications:

• Tube Type: 6J1 (substitutes: 6AK5, 6AU6, 5654)
• Channels: 2.0 Stereo
• Voltage: AC 12V, 0.8A or higher
• PCB Size: 77 x 75 mm (3.03" x 2.95")
• Input: Phone, PC, MP3/MP4, or other audio sources
• Output: Connects to amplifier audio input

Package Includes:

• PCB Board + All Resistors, Capacitors & Diodes
• 2 × 6J1 Vacuum Tubes + Bases
• Transistors, Potentiometer, Blue LEDs, Power Connector
• Mounting Hardware, Standoffs & Pot Cap
• Full DIY Component Set

Perfect for audiophiles, DIY electronics lovers, and music creators, this 6J1 tube preamp kit offers both a fun building experience and a serious sound upgrade.