Amazon.com: Line Mixer 4 Channel, Donner Low-Noise Mini Audio Mixer DC 12V with AC adapter & Stereo/Mono Adjustment, As Microphones, Guitars, Keyboards or Stage Sub Mixer, Ideal for Small Clubs or Bars :
Ashly TM-335 Public Address Mixer/Amplifier TM-335 B&H Photo
AMW 3118 TM transit mixer introduced at EXCON 2013