■ Feature 1: From Beginners to Hardcore Enthusiasts – Build Your Own Vacuum Tube Power Amplifier
・2A3 Single-Ended Direct-Coupled Class A2 Power Amplifier
Prioritizing damping factor and distortion characteristics over output by using a higher load impedance — Susumu Soya
・25L6GT Push-Pull Power Amplifier
8W output with a carefully designed power supply circuit — Susumu Soya
・EL84 Double Push-Pull Power Amplifier
Symmetrical circuit using an input transformer for phase inversion — Yasuo Iwamura
・6L6GC Push-Pull Altec-Type Stereo Power Amplifier
31W output and rich bass from a simple circuit — Hiroshi Ueno
・VT-62/801A Parallel Single-Ended Zero-NFB Power Amplifier
Triated tungsten filament powered with AC and hum cancellation circuit — Kazutomo Kobayashi
■ Feature 2: Improve Your Sound Quality with Minimal Effort
・Room acoustics tweak with just a quilt on the floor — Chigaku Inoue
・Safe stylus cleaning with a vibration-type cleaner — Mitsugu Kobayashi
・Improved sound quality with three-point virtual grounding — Isao Shibasaki
・Higher fidelity with bi-wiring speaker cable connection — Ikuo Kakuta
・Fine-tuning diffusion/absorption and upgrading power taps — Takashi Iwai
・Secure cable connections and maintenance — Koichi Hanzawa
・Improve sound with optimized cables and audio racks — Heisuke Ikeda
・Zero-bias J-FET symmetric circuit MC head amp — Yasuo Iwamura
・Reorganize room layout for better sound imaging — Hiroshi Ueno
・Improving the low-frequency characteristics of Yamaha NS-1000M — Hideyuki Sakai
・Passive 6dB/oct channel divider for 2-way multi-amp playback — Masashi Yanagisawa
■ Original Sound System Construction
・6C33C-B High-Power DC Amplifier
437A and C3g differential amp in the input stage; 6C33C-B SEPP in the output stage; 66W×2 into 8Ω — Akihiko Kaneda
・Audio Amplifier Design Support with PC [Vol. 61]
Building a Multi-Amp System — Heisuke Ikeda
・High-Performance, High-Sound Quality Speaker Design with Latest Measurements and Methods [Vol. 36]
Building a Compact 2-Way Speaker Using a SEAS Magnesium Woofer (Part 1) — Kohei Suzuki
・Designing the Tweeter and Enclosure — Kohei Suzuki
■ Audio Technology
MJ Technical Report: New York–Tokyo Audio Correspondence No.2
・The Wheel of Time Comes Full Circle – A Conversation with Legendary Punk-Spirited Audio Engineer Jean-Christophe Morrisson — Devon Turnbull
The Evolution of Hardware and the History of Audio Manufacturers [Vol. 105]
・The Path of SAEC Commerce (Final Installment): CD Accessories and Cables — Isao Shibasaki
・Accuphase's Latest Integrated Amplifier: E-3000 and ER-800S Circuitry and Implementation Technologies — Isao Shibasaki
...and more!!