How could surround sound be used in an audiophile system?


I am an audiophile with a dilemma. I do not like two channel stereo, because the speakers are only 45 degrees apart. This gives me a bad case of tunnel sound. I realize that high end systems have excellent sound dispersal, but only within 45 degrees. That is not enough spread if one is listening to orchestral music. Separation of the speakers gives better sound dispersal, but it leaves a hole in the center. I could place an equally sized speaker in the center powered by an amplifier of equal quality. The problem is that there is no such animal as a three channel preamp with a mono center channel. Next, I would like to use back speakers to smooth out the sound of the front outside speakers. While the three channel stereo has better dispersal, the sound ends too abruptly at the corners of the room. This now would require a five channel preamp (two left signals, two right signals, and mono center).

I know, I know, this sounds like home theater. However, home theater processors are notorious for distorting sound as they "interpret" where different parts of the two channel signals are positioned. Even more distortion is added as the processor adds reverberation.

My goal is to have a pure sounding system that fills the whole room with the undistorted sound of an orchestra. I would like to be able to pin point every instrument in the orchestra from one side of the room to the other. What I need is a five channel preamp with a mono center channel. The problem is that this preamp does not exist, and never will. The artificial sound of five channel home theater is here to stay. This is really depressing. This is a real dilemma. Does anyone have any ideas how to solve this problem?
redwoodgarden

Showing 2 responses by subaruguru

Whoah! Can't get soundstaging depth or width with two channels?? You gotta be kidding!? Alright, maybe if your room is a mess, or you are forced to set up your pair very near the front or sidewalls (ala typical HT setup), then synthesizing space requires more drivers.

But believe me, a tight triangle of a well-matched pair of great speakers, when set in the nearfield WELL out from the front wall, and at least reasonably away from the sidewalls
(more a function of furniture, dispersion, blah blah blah) will throw a HUGE soundstage!

To wit: I have a 7.5 foot equilateral trangle set in a 14x24
x8 room. The stage extends EASILY 10 feet BEHIND the speaker plane, and a couple of feet outside each speaker, too (12-15 feet wide). I credit this success to cheap and easy sidewall reflection control (furniture and pillows),
proper toe-in, and extremely well-matched speakers (Parsifal Encores). I have NO problem experiencing large and small concert halls, and have truly palpable, 3D imaging of full-sized soloists several feet behind the speaker plane.

As a somewhat-silly earlier-era experiment I set up a couple of old small cheap speakers in an adjoining small room behind my listening chair, in a "Dynaco" style rear ambience pair, with a 50 ohm pot via solid 20-AWG "invisible to Ellen" wire to my listening chair. Whereas I NEVER introduce any rear ambience in classical or most jazz recordings, I sometimes crank up a bit of rear level; I never hear it, per se, but sense a shortening of stage depth (darn!), but a sensation of moving closer to the front of the hall. This non-delayed ambience inducement is useful only for a fuller sense of immersion with rock or electric jazz recordings, especially if audience applause was mixed in too far forward. Whereas it can be a bit novel to dial in these rear speakers, I find that best staging depth is obtained with only the front pair on! I have several friends with high end 5.1 systems, and they're shocked at what can be done with 2 channel in a carefully designed setup. This room is also our formal parlor, and therefore has to be VERY acceptable to Ellen...and sports my Steinway B behind the speakers, too. (It's wonderful to see Tony Bennett standing BEHIND the piano belly while Bill Evans lyricizes with him on that great XRCD remaster!)

Sorry to belabor this, but I also consider the prospect of having to stare at a CENTER speaker where Sonny Rollins or Stan Getz like to prowl around is heretical...and a travesty. And what am I gonna do, sit it on top of the Steinway, where Diana and Kendra, or Jessica sit? Gimme a break!
Two channel is NOT anachronistic, nor necessarily limiting.
Good night, all. Ern