Polk RT 60 ( set of two front speakers) Well maintained, sparingly used, best of Polk series with amazing sound quality. Speaker System * Detachable Grilles. Yes. * Amplification Type. passive. * Crossover Channel Qty. 3-way, 2-way. * Frequency Response. 38 - 25000 Hz. * -3dB Frequency Response. 48 Hz. * Nominal Impedance. 8 Ohm. * Recommended Amplifier Power. 20 Watt. * Sensitivity. 90 dB. Only serious buyers plz message or call to enquire الماركة ماركة أخرى الحالة مستعمل