The classic model for professional 1" screwdrivers. It is installed in many of the company's 43 series, etc., and it is a driver that is easy to balance even when combined with various woofers and tweeters. There are small scratches, paint peeling, and there is small corrosion on some parts of the diaphragm (Oikawa Tetsuji)
Maintenance information: 2026.1.29 Operation confirmed
2012.8.11 Maintained (magnetic circuit overhaul, operation adjustment, replacement of sound absorbing urethane material)
Accessories: none
Main specifications: 1 inch driver, throat diameter: 25 mm, 16 ohms (measured 10/12 ohms), 118 dB, frequency characteristics, 800 Hz to 20 kHz, crossover frequency: 500 Hz or more, 5.1 kg