As far as the difference between the two devices you are describing, I don't know.
The one I have used and am still using is the Pink Noise Version of the Neurophone, which sells for $290 from toolsforwellness and about $250 from Patrick Flangan's company...you can find that company by doing a yahoo search on Patrick Flanagan (he's the guy who invented the device). It doesn't have an external audio input so you can only set the audio output to either a pink noise setting (which is the one I have used extensively) or a Fibonacci ratio setting which is supposed to induce relaxation and meditation. With the one you are talking about you can have it output anything you'll play out of a stereo.
This pink noise version is the one I was recommending you look at; cause it is at least in the same ballpark as those LS devices as far as price.
And I have gotten some really great results from it. Nothing I have done previously, including EEG biofeedback, has increased my learning ability as much as this device. It definitely has a real balancing effect on the body and the nervous system. One of the incidental effects I noticed yesterday, was that I could hold the "tree pose" in the hatha yoga system indefinitely from either foot without any warmup, which is unheard of for me considering I haven't been doing any yoga for the past two months. My balance is usually just not that great. There is a mental feeling of balance and this seems to be coincident with the body's own sense of balance.
As far as the difference bewteen the two devices you are describing...well I used to browse a bioelectromagnetics yahoo group that seemed to have a lot of technical types who had built their own homeade neurophones...apparently it's not really that hard even, although I haven't looked into the procedure. Anyway some of these folks seeemed to think that the models you could build out of Radio Shack parts and brillo pads were as good as the curent updated model...so I really don't know if there is a very large variation in the basic technology.
Anyway, I have gotten great results from the pink noise model, and for all I know the more expensive ones are that much more effective.
The benefits were the result of using the device on the pink noise setting for at least two hours a day, for a period of two and a half weeks.
It is not something you are going to immediately feel the first time you use the device.
[This message has been edited by garics (edited March 01, 2005).]
