This is the bare PCB of a high end stereo tube preamplifier with reference to Kondo KSL-M77. The amplifier consists of 8 12AY7( or 6072WA) and one 6X4 rectifier tube. This preamplifier includes both phono and line stage. The board contains the amplifier sections, power supply section, audio selector and volume control too. This is a PCB for stereo amplifier. The board is built with premium quality, including thick copper, gold plated conducting surface and two-sided solder resist for maximum reliability. The PCB thickness is 2.0mm. PCB dimension : 290mm x 220mm PCB thickness : 2.0mm, 2 oz ( 75um thickness !!) copper deposition. We provide schematic to buyers by EMAIL. The assembled board is for reference. The listing is for bare main board one piece and the audio selection daughter board ( the small black PCB with the rotary switch mounted as in the assembled board picture). We do air shipping worldwide at US$10.00. We welcome combine shipping. Powered by SoldEazy