| Audiophilia | https://audiophilia.com/hardware/quads.htm |
| Stereophile | Stereophile: Feb 1989, vol 12, iss 2, Greenhill |
| Stereophile | Stereophile: Jun 1989, vol 12, iss 6, Atkinson |
| Stereophile | Stereophile: April 1983, vol 6, iss 4, Holt |
| Stereophile | Stereophile: Oct 1981, vol 4, iss 10 |
| Absolute Sound | Absolute Sound: Dec 1983, vol 8, iss 32, Nork |
| Absolute Sound | Absolute Sound: Mar 1988, vol 13, iss 52, Greene |
| Absolute Sound | Absolute Sound: Jan 1989, vol 13, iss 57 |
| Stereophile | https://stereophile.com/floorloudspeakers/416 |
| Stereophile | Stereophile: Sep 1983, vol 6, iss 4, Holt and Various |
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