Yamaha StagePas 400i Portable P/A System FREE YBSP400i Case Speaker Stands/Bag System Type : Powered mixer with 2 passive speakers Maximum SPL (*Maximum SPL) : 125dB SPL / speaker Frequency Range (-10 dB): 55Hz 20kHz Analog inputs : 4 mono mic/line + 4 mono / 2 stereo line Steel center shaft adjusts from 45" to 73"