We've combined audio products to make it easy to power the audio from Lights Alive's FireFly™ lightning simulators. Theckage includes two RCF HD 12-A active speakers, with 1400 watts of audio each. Then we added a six-channel RCF L-Pad mixer, so you can mix the thunder effects with background audio in a second channel, and possibly microphones or other audio in the other audio input channels. Use your imagination. Then, we've included free 20-foot audio cables to connect the mixer with the speakers! Connect your audio source to the mixer, and you're ready to go!