- Loudspeaker system 2-way on-wall speaker. Passive radiator design - Tweeter 29mm high definition DAD driver. DKM dome diaphragm. Neo Magnet system. Visco-elastically baffle decoupling. Sonus faber design - Midwoofer 150mm cone driver. Ultra-free compression basket, Sonus faber design. Special custom diaphragm is made with a real time air dried non pressed blend of traditional cellulose pulp and other natural fibers, developed according to the most natural sound. Ultra Crossover Anti-resonant design, optimized amplitude/phase response for optimal space/time performance. “Paracross topology”. - Crossover frequency: 3.800 Hz - Frequency Response 60 Hz -25.000 Hz - Sensitivity 89 dB SPL (2.83V/1m) - Nominal Impedance 4 ohm - Suggested amplifier 30 W -150 W without clipping