Introducing the Koax. speaker 10"/1", 300/50W, 99/109dB, 65-20000Hz, X-max 4.8mm, weight 3.1kg. • The CX10N251 is a lightweight coaxial driver known for its exceptional linearity and high efficiency. • It emits a coherent single spherical wave front with precise dispersion control. • Powered by a large neodymium ring magnet, it boasts an extremely high flux density and BL factor. • The innovative hyper-vented aluminum basket and magnetic assembly design ensure excellent heat dissipation and reduced power compression. • Special air-forced ventilations are included for the voice coil, magnet assembly, and basket. • Featuring a 2.5” voice coil with a robust fiberglass former and aluminum wire for efficient mid-bass cone driving. • The 1.7” dome compression driver, paired with a 60° conical waveguide, delivers clear vocal output and superb high-frequency extension. Features: • 600 Watt continuous program power handling for Mid-Bass • 2.5-inch fiberglass outside, aluminum voice coil • 99 dB Sensitivity • 65 Hz - 3.5 kHz Frequency range • Dual-forced air ventilation for minimal power compression • M-roll surround and exponential cone geometry • Demodulation ring • 100 Watt Continuous program power handling for HF • 1.75-inch Diaphragm, 1.0-inch Exit Throat • Frequency range: 1200Hz – 20kHz • 2-slot, optimized geometry phase plug • Polyester diaphragm • Aluminum rear cover dissipation design CX10N251 Driver: • Nominal Diameter: 25.4 / 1.0 mm/inch • Rated Impedance: 8 ohm • Program Power: 100 W • Power Handling Capacity: 50 W • Sensitivity 1 W, 1 m: 109 dB • Frequency Range: 1200 - 20000 Hz • Minimum Impedance: 6.5 ohm • Voice Coil Diameter: 44.4/1.75 mm/inch • Voice Coil Material: Edgewound Aluminum • Number of layers: 1 - Outside • Diaphragm Material: Polyimide • Diaphragm Design: Dome • Suspension Material: Polyimide • Suspension design: Flat • BL factor: 7.5 T · m • Flux density: 1.9 T • Phase plug design: 2 slot • Phase plug material: Composite • Magnetics: Neodymium CX10N251 Horn: • Throat Diameter: 25.4 / 1.0 • Nominal coverage (-6dB): 60° • Cut-off Frequency: 1800 • Material: Structural Polyurethane CX10N251 Woofer: • Nominal Diameter: 250 / 10 mm/inch • Rated Impedance: 8 ohm • Program Power: 600 W • Power Handling Capacity: 300 W • Sensitivity: 99 dB • Frequency Range: 65 - 3500 Hz • Effective Piston Diameter: 210 / 8.27 mm/inch • Max Excursion Before Damage (peak to peak): 30 / 1.18 mm/inch • Minimum Impedance: 6.4 ohm • Voice Coil Diameter: 64 / 2.51 mm/inch • Voice Coil Material: Aluminum • Voice Coil Winding Depth: 14 / 0.55 mm/inch • Number of layers: 1 • Top Plate Thickness: 8 / 0.31 mm/inch • Cone Material: No pressed pulp • Cone Design: Curved • Surround Material: Polycotton • Surround Design: M-roll Thiele/Small Parameters: • Resonance frequency: Fs - 72 Hz • DC resistance: Re - 5.2 ohm • Mechanical Factor: Qms - 4.5 • Electrical Factor: Qes - 0.25 • Total Factor: Qts - 0.23 • BL Factor: Bl - 17.5 T · m • Effective Moving Mass: Mms - 28 g • Equivalent Cas air load: Vas - 25 liters • Effective piston area: Sd - 0.035 m2 • Max. linear excursion (mathematical): Xmax - 4.8 mm • Voice-coil inductance @ 1 kHz: Le1K - 1.2 mH • Half-space efficiency: Eff - 4.7% Mounting Information: • Overall Diameter: 260 / 10.24 mm/inch • Bolt Circle Diameter: 241 - 246 / 9.50 - 9.60 mm/inch • Bolt Hole Diameter: 5.5 / 0.22 mm/inch • Front Mount Baffle Cut-out: 234 / 9.21 mm/inch • Rear Mount Baffle Cut-out: 234 / 9.21 mm/inch • Depth: 126 / 4.96 mm/inch • Volume occupied by the driver: 2.1 / 0.07 liters/ft3 Shipping Information: • Net Weight: 3.1 / 6.83 kg/lbs • Shipping Weight: 3.3 / 7.28 kg/lbs