Jamo E8SUR.2 Left Surround Speaker (Black Ash) Woofer 5" Tweeter 1" DCD(Dual Concentric Diaphram) Power, long/short term (Watt) 100/140 Sensitivity (dB - 2,8V / 1m) 88 Frequency range (Hz) 80- 40000 - Impedance (Ohm) 4