Has anyone heard the new North American products preamp and amp?

Roger, this is a good explanation, but I suspect it is over gdhall's head. 

I have noticed that the sound image of symphonic music is both greatly widened at the sweet spot and that even moving into the corner of the room I still get a sense of the sound stage. I haven't tried this with say electrostats that do not present much of a wide sweet spot. 

Tbg wrote,

"Roger, this is a good explanation, but I suspect it is over gdhall's head."

That argument, "I'm smart and you're stupid" is one way to try and win arguments.  That's the ugly sibling of, "I have more than fifty years in audio so I must be right." Or the other logical fallacy, "I have a PhD in Microbiology so I win, you lose."

geoffkait, Roger gave a better answer, as I said, but thanks for your opinion.

All I'm saying is that one's sitting
position is not as critical when using
H-Cat, versus  conventional electronics.
The detail in the music just blossoms
with a holographic presentation and that presentation has no coloration just a neutral signature.

There are many room anomalies that influence the size and location of the sweet spot. You know, slap echo, standing waves of many frequencies, and reflected waves. There are many sound pressure peaks around the room that have much higher SPL than the average speaker SPL in the room! Unless you’ve actually mapped out the sound pressure levels in the room there is no way to control the sweet spot. Not to mention the speaker locations’ influence on the sweet spot. Trying to deal with room anomalies AND speaker positions at the same time is analogous to trying to solve two simultaneous equations in three unknowns. Many audiophiles are sitting right in the middle of a standing wave and don’t even know it.