Pure Acoustics® TOWER speaker details SPARK - F ower handling: 200 wa requency Response 45Hz-22KHz Sensitivity: 90 dB edance: 8 0hm hileded CENTRE speaker details SPARK - C Power handling: 140 watts Frequency Response: 55Hz-20KHz Sensitivity: 86 dB Impedance: 80hm Surround speaker details SPARK - S Power handling: 140 watts Frequency Response: 60Hz-20KHz Sensitivity: 85 dB Impedance: 4 Ohm Designed & manufactured by Pure Acoustics Inc. USA Yamaha amplifier details YAMAHA MODEL NO. HTR-5930 110 - 120/220-240 VOLTS 240 WATTS 50/60Hz ^ YAMAHA CORPORATION SER. T239896VX