The Professional 10 Channels Mixer Amplifier 10600USB Mixer Amplifier is a versatile front of house PA mixer built into a compact and durable molded cabinet. Each SPM10600 Mixer Amplifier has a built-in stereo amplifier which is bridgeable and patchable. Super Hi-Z inputs allow for the addition of guitars and other instruments. A USB recorder is also incorporated into the unit, allowing the main mix to be captured onto any standard USB storage device. The units also offer high definition digital effects Ultra-low noise 10 channel, digital effect powered mixer. Ultra-musical 3-band EQ on all channels and 2x7 band EQ on all master output. +48V PHANTOM POWER, with inside USB & SDCARD, MP3 playing system. Power voltage: 120V or 230V Power output: 8/10/12CH 2x300W 4Ω (RMS: 2x200W 4Ω) SMT (Surface Mounting Technology), Reliable performance.