[Feature]
<Build your own cutting-edge amplifier! Three models of phono equalizers for optical cartridges>
●Challenging the Latest Devices with Vacuum Tube Technology: Dedicated Phono Equalizer Amplifier for Optical Cartridge DS-E3 - Hiroshi Ueno ●Equalizer Amplifier for Optical Cartridges: WE 396A, Op-amp, Balanced Output IC, and Ultra-Low Noise Power Supply Module - Yasuo Iwamura ●Dual Cartridge Vacuum Tube Preamplifier: Compatible with Optical and MC Cartridges, 420A First Stage Differential Amplifier + 396A SEPP Output Stage - Akihiko Kaneda ●Audio Test of 3 Builder-Made Phono Equalizers for Optical Cartridges - Takashi Iwai ●Latest List of Optical Cartridges & Phono Equalizers
[Original sound system production]
●Stable operation achieved with a dual power supply system: 8045G single direct-coupled power amplifier - Susumu Soya ●Russian-made direct-heated triode driven by cathode follower, 6.5W output in Class A2 operation: SV811-10 single power amplifier - Masaru Nagashima ●12AX7, 12AU7 multi-function preamplifier with phono equalizer, tone control, line output, and headphone output - Kazutomo Kobayashi ●Building the optimal system for modified units: Experiment on excitation of Diatone P-610 [Part 2] Construction of enclosure and excitation power supply - Hiroshi Ueno ●Audio amplifier design and construction support using a PC [Part 64] Construction of a multi-amplifier system (4) - Heisuke Ikeda ●Manufacturing high-performance, high-quality speakers using the latest measurement and design [Part 39] Construction of a small 2-way speaker using SEAS magnesium woofer (Conclusion) Measurement and exterior finishing - Kohei Suzuki ●Designing and manufacturing a small speaker aiming for a high-efficiency, high-quality system [Part 199] -Takahisa Ozawa
[Audio Technology]
<MJ Technical Report>
●Soul Note: Circuit Technology of Series 1/Series 2 ver.2 - Isao Shibasaki ●The History of Audio Manufacturers as Seen Through Hardware Changes [Part 108] Luxman's 90-100 Years of Progress (3) Semiconductor Integrated Amplifiers - Isao Shibasaki ●Knowing True Characteristics Through Actual Measurement Data Measuring the Characteristic Curve of Vacuum Tubes (5) Characteristics of 4-65A Triode Connection - Masaki Kubo ●Reviving from Junk to Practical Equipment Audio Equipment Repair Diary [Part 27] Maintenance of Yamaha FM/AM Tuner T-7 - Hideyuki Sakai
[MJ Best Audio Components]
<MJ Zoom-in>
● Soul Note A-1 ver.2 Integrated Amplifier ● Fundamental aina Integrated Amplifier ● Fidelix ARIETTA 2-Way Speaker System ● Yamamoto Sound Craft BX-70-LE8T Enclosure for LE8T ● Soul Note D-1 ver.2 D/A Converter
Released 26/03/10
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MJ Radio and Experiments April 2026 Spring Issue | Seibundo Shinkosha Co., Ltd. (seibundo-shinkosha.net)