Я про М2 писал Монтана вот https://pbnaudio.com/m25-loudspeaker/ Увы все оказывается проще чем в м2 Driver Complement: LF: 2 each JBL 2235H 15” Woofers MF/HF: 1 each JBL2430H Dual Diaphragm Compression Driver mounted on WaveGuide Crossover: 5th Order Charge coupled with 3 x 9V (27V) @ 900 Hz Crossover Capacitors: High Voltage (400VDC) Metalized Polypropylene Sensitivity: 95dB / 2.83V /1M Frequency Response: 25Hz to 20kHz +/- 2dB Im