Tannoy Stirling III LZ Special Edition 2-way 10″ dual concentric speakers in oiled walnut Specification: Frequency response 29 Hz - 27 kHz (-6 dB) Recommended amplifier power 20 - 250 W Power handling (IEC) 125 W continuous, 500 W peak Nominal dispersion 90 degrees conical Sensitivity 93 dB (1 W @ 1 m) Impedance 8 ohms Minimum Impedance 5 ohms Maximum SPL 114 dB continuous, 120 dB peak Components Low frequency dual concentric 250 mm (10″) with paper pulp cone with twin roll impregnated fabric surround, 52 mm (2″) round wire voice coil High frequency dual concentric 52 mm (2″) aluminium/magnesium alloy dome with round wire voice coil and mylar surround