I think I should chime in here, all of the above makes perfectly good sense and that was also the reason why I refrained from any experiments into that direction until I heard that Quad's Peter Walker had a speaker setup ( a wall of his stators) not unlike the one I had arrived at PLUS Quads (don't know how many though) arranged along the side (not back) of his listening room. When I had managed to obtain a pair of ESL63 from ebay at a very good price I started experimenting and finished placing the speakers at right angles from the main speakers halfway between them and my listening position fairly close to the side walls, firing at each other and giving them a dedicated amp and preamp, fed from the tape out of my main preamp, a Jadis 200. I have the dedicated preamp close to my listening position, so I can dial in the exact dose of side information for every piece I am listening to. The dialing in has to be done in very, very tiny increments and what is most important, seperately for the left and the right side, in order not to ruin sound stage information and the placement of instruments and voices therein. However if done right, it will give back ambience to overly dry recordings and add width and depth and a sense of immediacy to good ones. I will never go back to the classic setup and found this to be a great step forward in my personal enjoyment of my rig. However the step between enhancement and ruin of a presentation is very slight and it is frankly even more difficult than properly dialing in a subwoofer. I also think, that it is essential with such a setup, that main and side speakers should be of the same make, or at least similar in their voicing and characteristics and all this should not be attempted for the very reasons given above, if the auxiliar side speakers cannot be dialed in exactly for each LP, Cd or master tape being played. Cheers, Detlof
WHat about four speakers.......
When you are in a concert hall, sound hits you from all sides. Why arent there high end systems with four speakers; the listener would pretty much sit in the center, you get a box to delay the rear speakers ever so slightly to imitate those sound waves taking longer to reach your ears. What are the ups and downs of a second set of speakers behind you, even without any sort of delay? A few of you guys must have tried this, thanks......