Stereo Imaging


I think I've written about this before, but I wonder how many of us who use the same system for HT and music get fooled into suspecting the center channel must be generating the center image. I was playing the Abkco disc of "Let It Bleed" and found myself compelled once again to put my ear to the center channel to assure it was not generating the strong centered image I was hearing. Intellectually I knew it wasn't because I've tested it before, but the image is so strong it creates a cognitive dissonance. In a world of 7.1, I'm afraid I forget just how effective stereo can be in generating a soundstage.

db
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I have the same experience. I have a big center speaker (Kef 204c) and two Verities parsifals for stereo and any unsuspecting listener would swear the vocals come from the center channel when I am playing 2 channel.

However, discrete multi channel is a different story. Because the dialog in movies is mixed to a discrete center channel, if you play native 5.1 on a 4.1 system a DSP needs to send the center channel info to L/R. These L/R channels then need to re-create the center channel image. I never tried 4.1, but I suspect there is come compromise involved.

On the other hand, a big advantage of 4.1 is there is no issue with timbre matching if you have different mains and center speakers/amps (as most people do).

Final consideration against 4.1 is if you prefer playing 5.1 SACD material in DSD source direct mode (like I do), bypassing conversion to PCM and the DSP. If you do this, you cannot play source direct with a 4.1 system because you would loose the center channel information.
It depends on your speaker setup. In my room the mains must be far apart, and I have used a center since before multichannel was invented.

The extra speaker provides extra volume, taking the load off the mains.
Larry,

The Cd you are talking about is from a group called Deep Forest. The song is #6. I forget the name of it. Quite bizzare how those drums sound as if they are directly behind you!

Mike
My rig is a 2-channel/HT combo, but the 2-channel sources run a detour around the multi-channel gear. When I had a large SD RPTV with my center atop it, that illusion happened constantly when listening to stereo sources. Now, with a plasma, and center mounted beneath the TV on a stand, the illusion is rarer. I think this is due to the height of the center image provided by my Ohm Walsh 2000s. Most vocalists appear to be about 5'6" tall, about where my center used to be, but about 3 to 4 feet higher than where it is now. A visual disconnect.

FWIW, I did try my system with a phantom center setting, but on film soundtracks, the center just lacked some oomph that it has when I installed the center channel speaker.