Shure SCM268 4-Channel Rack Mountable Microphone MixerSix Reasons the SCM268 Is The Right Choice: Transformer. Transformer. Transformer. Transformer. Transformer. Transformer. Another Reason: The Great Value When you see the price attached to the SCM268 microphone mixer, you'd never guess that there are six transformers inside: four transformer balanced XLR microphone level inputs, one transformer balanced XLR mic line output, and one internal low stray field, toroidal power transformer. Nor would you