6L6GC All-Stage Direct-Coupled Single Vacuum Tube Amplifier. Amplifier body with a flat design, equipped with four vacuum tubes. - Colors: White, Light Blue - Number of Vacuum Tubes: 4 - Number of Volume Knobs: 2 - Number of Transformers: 4 - Design: Flat appearance Thank you for viewing. This is a 6L6GC all-stage direct-coupled single power amplifier. It uses a 6AQ8 in the first stage and 6L6GC power tubes. Although I haven't used it much since assembling it, I tested its operation by playing music continuously for 12 hours. The body gets hot, but I was able to listen to music with good sound without any problems. The 6AQ8 pre-amp tube is used, but the rest, including the transformers and CR components, are new. The body uses a wooden frame with painted aluminum plates. There are no noticeable scratches on the transformers or the body. I think you can see this from the photos. It has a unique color scheme, but I think it's a one-of-a-kind piece, made by hand.