29MMØ RING DOME - NEODYMIUM - 72MMØ FACE PLATE Non-resonant diaphragm design for minimum high frequency break-up. CCAW voice coil for low moving mass. Long life silver lead wires. Low resonance frequency. Copper cap on pole piece for reduced voice coil inductance and minimum phase shift. Inherently shielded neodymium motor system. Internal pressure equalization and flow resistor for non-resonant coupling of cavities. Compact design. Non-resonant diaphragm design for minimum high frequency break-up CCAW voice coil for low moving mass Long life silver lead wires Low resonance frequency Copper cap on pole piece for reduced voice coil inductance and minimum phase shift Inherently shielded neodymium motor system Internal pressure equalization and flow resistor for non-resonant coupling of cavities Compact design