Ceiling Speaker High Quality Sound. FEATURES: VR6-SC 6.5" Ceiling Speaker Technical Parameters Bass: 6.5"Nomex Stratum Multiplayer Diaphragm, Anti-concave Rubber Folding Ring, 18.5oz Magnetic Steel, 25mm (1") Voice Coil Tweeter: Natural Silk Dome Sound Film, Double 20mm (0.8") Voice Coil, Magnetic Fluid Cooling, Neodymium Iron Boron Magnet Frequency Divider: Modified Phenolic Resin PCB Board, -12dB/Oct Low-pass Filter, -12dB/Oct High-pass Filter, Treble PTC Overload Protection SPECIFICATIONS: Resonance Frequency: 45Hz Frequency Response: 45Hz-20KHz Sensitivity: 85dB/W/M Recommended Power Amplifier Power: 10-60Watts Impedance: 8ohm Hole Size: 205mm (8.07") VR8-SC 8" Stereo Ceiling Speaker Technical Parameters Bass: 8" Nomex Stratum Multi Layer Diaphragm, Anti-concave Rubber Folding Ring, 21.8oz Magnetic Steel, 35mm (1") Voice Coil Tweeter: Natural Silk Dome Sound Film, Double 20mm (0.8") Voice Coil, Magnetic Fluid Cooling, Neodymium Iron Boron Magnet Frequency Divider: Modified Phenolic Resin PCB Board, -18dB/Oct Low-pass Filter, -18dB/Oct High-pass Filter, Treble PTC Overload Protection SPECIFICATIONS: Resonance Frequency: 38Hz Frequency Response: 40Hz-20KHz Sensitivity: 85dB/W/M Recommended Power Amplifier Power: 10-80Watts Impedance: 8ohm Hole Size: 250mm (9.85") . We are an international seller, your order will be from abroad so please allow the necessary time of minimum 14 working for right now depending on where you to, due to ongoing delays in postal globally.