Diatone Ds 35B, The Diatone DS-35B is a vintage 3-way airtight bookshelf loudspeaker system released by Mitsubishi in 1976. You can access its technical documentation and specification sheets through the Mitsubishi DS-35B Manual on HiFi Engine. [1, 2] Key Specifications Type: 3-way, 3-speaker sealed (airtight) bookshelf system Drivers: 30 cm cone woofer, 10 cm cone midrange, and 3 cm GFRP dome tweeter Impedance: 6 ohms Frequency Response: 35 Hz – 20,000 Hz Crossover Frequencies: 800 Hz and 5 kHz Output Sound Pressure Level: 91 dB/W Maximum Input Power: 80W Dimensions & Weight: 365 x 655 x 321 mm; 21 kg per speaker [1]