Holographic imaging


Hi folks, is the so called holographic imaging with many tube amplifiers an artifact? With solid state one only hears "holographic imaging" if that is in the recording, but with many tube amps you can hear it all the time. So solid state fails in this department? Or are those tube amps not telling the truth?

Chris
dazzdax
There's little difference in the imaging of properly functioning SS and tube equipment. Dark Side of the Moon, Radiohead, I Robot are a few "holographic" recordings that fill one end of the room with an image as tall and wide as the room and much deeper. That's done with out of phase signals. If your two-channel, tube system throws images way beyond the speakers with an orchestra playing Mahler, then there's something wrong.

SS does not "fail" at imaging and I don't think that tube amps do either; however, one that throw images that are not in the recording are failing.

Have you got some specific examples?

Dave
Hi Chris,
I use Atmas and VTLs at the moment and get holographic imaging only if it is on the software. In my experience both SS as well as tube amps can screw around with phase, which sometimes, not always, can give you the illusion of holography.
"Holographic imaging", or transparency as it is often referred to, is an artifact of a combination of system and room acoustics resulting from speaker placement. Its not due to SS or tubes. Either may or may not image "holographically" depending on other factors.

The main pre-requisite for holographic imaging is that the sound not arrive at your ears primarily from the direction of the speakers alone. Another is that there is good stereo separation between speakers and that signal is relatively clean and not overly polluted with distortions.