※Shipping service. Written by Akihiko Kaneda/Self-made Audio Dedicated to Music Fans/2004 to 2008 10 carefully selected models/A leading expert explains in detail the theory and actual manufacturing methods of DC amplifiers, from record playback systems to MC/CD combined vacuum tube preamps, hybrid DC power amplifiers, and GM-70 push-pull power amplifiers/published on 2008.8.25. Since the photograph is a sample, the actual item may be broken or there may be markings etc.