The RCF ND840 is a high-performance 3-inch diaphragm compression driver with a 1.4-inch exit throat, designed for compact yet powerful professional sound systems. It features a pure titanium diaphragm, 3-slot phase plug, and copper inductance ring for an extended frequency response with minimal distortion. The Direct Drive Kapton voice coil assembly ensures high power handling and thermal stability, while the vented, damped suspension system improves clarity and low-frequency extension. With 220W continuous program power handling and 109 dB sensitivity, the ND840 is an excellent choice for high-powered two-way and multi-way speaker systems. Product Specifications: Exit Throat Diameter: 1.4 inch (36 mm) Impedance: 8Ω Program Power: 220W Power Handling: 110W Sensitivity: 109 dB Frequency Range: 500 Hz - 20 kHz Diaphragm Material: Pure Titanium Suspension Material: Pure Titanium Suspension Design: Double Roll Minimum Impedance: 7.00Ω Voice Coil Diameter: 3.0 inch (76 mm) Voice Coil Winding Material: Edgewound Aluminum Voice Coil Former: Direct Drive Kapton Layers: Inside/Outside, single layer Flux Density: 2.0 T Phase Plug: 3-slot aluminum Magnet Type: Neodymium Demodulation Ring: Copper Overall Diameter: 115 mm (4.53 inches) Overall, Height: 46 mm (1.81 inches) Mounting: 4 × 6 mm threaded holes at 90° Shipping Information Package Dimensions: 142 × 144 × 63 mm (5.59 × 5.67 × 2.48 inches) Weight: 1.4 kg (3.09 lbs) Shipping Weight: 1.7 kg (3.75 lbs)
