Yes and ditto. In fact, the Motion Sound amps employ something similar and if you overuse it then you do get the "tunnel effect". What it's doing is reversing the phase of the speakers so what's panned to the middle is reversed and diminished somewhat, same as what "vocal eliminators" do, leaving the reverb. Since the Motion Sound uses a true discrete stereo amp, both in terms of actual amplification and speaker setup, I think it probably sounds better than the quasi-stereo amp offerings. Turning it's stereo enhancement knob up really does make the sound expand all around you in a very obvious manner and the effect to your mix is similar to compression, except that it doesn't affect the tonality. I find it works best for me set at about 5-6 on a scale of 10. There really is only one way to know if it works for you or not...