MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
MJ AUDIO TECHNOLOGY July 2025 Summer Edition
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MJ AUDIO TECHNOLOGY July 2025 Summer Edition

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■ 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!!