Description: Analog Music Tube: This DIY kit allows you to build a biliary electronic tube based on the circuit principle of the X-10D, with optimized stability and 10% improved performance Enhanced Sound : The vacuum tube preamplifier board enhances sound , making music softer and sweeter, with a unique gallbladder flavor for warm and durable sound Easy DIY Assembly: This welding kit includes all components needed for DIY welding of audio boards, making it easy for beginners and enthusiasts to build their own speaker Improved Performance: The Forfever 6J1 audio front-end speaker provides good musical sense and atmosphere, with a 10% performance improvement over original machines Box Board Accessories: Complete your DIY project with the box board welding accessories, designed for self-assembly of welded parts for the biliary tube DIY kit Specification: Color: As Shown. Material: Iron. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: Style 1:1 * Gallbladder Electronic Tube DIY Kit Style 2: * Gallbladder electronic tube DIY kit+audio cable Style 3: * Gallbladder electronic tube DIY kit+shell+audio cable