Carving Up The Soundstage
This 1980 demonstration record for a Carver Sonic Hologram pre-amplifier from Carver Electronics Corporation is fairly useless, I suppose, without the actual piece of hardware that it was meant to promote, but some of the tests on side one are still useful for general hi-fi setup. I expect the conversion to mp3 totally ruins the Sonic Hologram (TM) properties, though.
These devices were designed to expand the soundstage beyond the boundaries of the two stereo speakers without going to a quad system (which was pretty much dead by 1980). Most online discussion recommends them for headphone use, as opposed to speaker use.
Carver Electronics Corporation – Sonic Hologram (TM) Demonstration - Calibration - Test Record C-4000
|A2||Loud Speaker Phasing|
|A3||Internal Cartridge Phasing And Frequency Response|
|A4||Cartridge Absolute Phase And Electrical Balance|
|A6||Peak Unlimiter Adjustment|
|A7||Time Delay And Echo Density|
|A9||Introduction To Side Two|
|B1||Sonic Holography (TM)|
|B3||Holography Encoded Music|