Jay, I assume you’ve seen Pete Van Deusen’s Brain-Trainer site. An abbreviated or full head assessment is done. Then protocols recommended, typically 2 channel; but also 4 channel. Most home users of this system are using the Pocket-Neurobics 2 or 4 channel amps. Stefan Jung has already mentioned it. I’ve used Pete’s protocols since 2008, they are effective. Bioexplorer and Pete’s protocols are also a great jumping off point for writing your own protocols.
Many professional neurofeedback trainers do 2 and 4 channel training: Brainmaster, Thought Technology, EEGer, Cygnet (Othmer), LENS, NeurOptimal, NewMind (Richard Soutar), etc. Yes, a small minority are using full cap sLORETA, but that’s expensive with commercial systems, $6000 and up. If you want to do Z-score training, add in the normative database. Obviously consumer / home users are going to bring all of this down from the stratosphere. But don’t dismiss 2 and 4 channel training protocols.
William
