Yamaha's professional series mid-range driver unit with high input resistance. The diaphragm is made of a 66mm special aluminum alloy. Also, 0.15 mm beryllium copper etched on the edge is used to prevent damage due to fatigue. The exterior has threads and is dull (Sasaki Shota)
Maintenance information: 2025.11.16 Operation confirmed
Accessories: none
Main specifications: impedance 8 ohms, playback frequency band, 300 Hz to 12 kHz, recommended usage band, 500 Hz or more, 107 dB/Wm diaphragm, dome-shaped, aluminum alloy compatible horn, H-1230 (AD-3500 required), D-2230, outer diameter: 165 mm x height: 6.75 kg