Overview 6.5� 2-way In-Ceiling Speaker Woofer: 6.5� PP cone, rubber surround, 18.5oz Magnet, 1" voice coil, bumped back plate, vented pole piece Tweeter: Swivel 30 degrees, 1" Silk dome, Ferro-fluid cooled, Neodymium magnet, wide dispersion Crossover: Phonalic PCB board, 6dB woofer section, 12dB tweeter section, Polymide auto protective switch for tweeter Specifications General Data Frequency Range 45Hz- 20KHz Sensitivity 88dB Recommended Amplifier Power 10-140 watts Nominal Impedance 6 ohm Cut Out Size 205mm