This is an EL34 all-stage differential PP amplifier based on the Luxman Luxkit A3500. It features an innovative circuit configuration devised by Mr. Perke, a new circuit configuration that is neither single-ended nor push-pull. Since the differential amplifier sold the other day was very well-received, I have prepared a second one. *The next model is undecided. The build quality has been improved from the previous one, and there is almost no noticeable noise. Although the character is different from the Luxkit A3700 II prepared for comparison, I think the sound quality is about equal. 2SK30A is used in the first stage, 12AU7 in the driver stage, and the EL34 is triode-connected. This time, to further improve the sound quality, I have used Matsushita (National) EL34 tubes. As expected, Japanese vintage vacuum tubes have a serious and calm sound, which seems to be a good match for all-stage operating vacuum tube amplifiers. The 12AU7 in the first stage is new, although the manufacturer is unknown. *Circuit diagrams and power cables are not included. Power cables are available for an additional 500 yen. Please also check the video. https://youtu.be/TlyJetKd3jM?si=OqLPKjDoyFGvr9kJ As this is a personal item for sale, please refrain from after-sales support and detailed questions. Subjective matters such as noise during silence and scratches or dirt on the exterior are bound to cause discrepancies. Please be sure to check the description, video, and images posted, and agree to the terms. In principle, no claims, no returns, and no cancellations are accepted. Please refrain from purchasing if you are a nervous person or if you are looking for something as good as new from the manufacturer. Please purchase only if you understand that this is a used, handmade, and vintage item. Specifications: External dimensions: Approximately 465mm wide x 168mm high x 206mm deep Weight: Approximately 17.0kg