| Source | Info |
|---|---|
| Absolute Sound | Absolute Sound: Mar 1997, vol 20, iss 110, Breuninger |
| 6moons | https://www.6moons.com/audioreviews/walker4/sota.html |
| Positive Feedback | https://www.positive-feedback.com/Issue23/proscenium.htm |
| Positive Feedback | https://www.positive-feedback.com/Issue23/walker_proscenium.htm |