100% new and high quality<br> Input: AC 12V 1A 5.5*2.5 plug<br> Channels: 2.0/stereo<br> Potentiometer function: Volume adjustment + switch<br> FE-6J1-2 tube preamp board is designed based on the circuit schematic of the Music Fax X-10D, optimized for improved stability and 10% better tube performance. It uses a single 12V AC input to provide the required positive/negative voltage and filament supply for the 6J1 tube.<br> Operation: The tube filament heats up when powered, with a clean power supply system (8x470uF capacitor filtering). The DC filament reduces noise.<br> Color: As shown<br> Material: Plastic + metal<br> Size: 77mm x 75mm x 52mm<br> Package includes:<br> 1x 6J1 tube preamp board<br> 1x Transparent shell<br> 1x Instruction manual<br> 1x Screw set<br> Note: DIY assembly required. Package contents only, no additional items.<br> Color may vary slightly due to lighting/screen differences. Size tolerance: +/-1-3cm.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store