Real-life examples 267 Basic example systems Small vocal PA A pair of powered full-range 12 speakers with horns or tweeters mounted on tripod stands. Small mixer (maybe up to 8 channels). Small powered monitors could also be used from the aux outputs of the mixer. Medium band PA Mixer to suit (maybe 24 channels). Bass speakers. 15 or 18 . Top speakers. 12 with 1 or 2 horns. Power amps and 2-way crossover. You could also use bass, mid and top speakers with suit- able amps and a 3-way crossover. Powered mixer PA