6.5" polypropylene woofer withNBR surround</br>1" Ferrofluid-cooled, pivoting silkdome tweeter</br>Frequency range: 50Hz-20kHz</br>Sensitivity: 90 dB</br>Nominal impedance: 8 ohm</br></br>Product Description</br></br>2-way in-ceiling/in-wall high resolution speaker with 6.5" woofer and edgeless grille</br><br/>http://www.amazon.com/gp/product/B00NJTVNIW