| Year | 1934 |
| Date | 08-Feb |
| Volume | 70 |
| Issue | 1,709 |
| Page | 134 |
| Category | Electrical |
| Part | |
| Title | How to Construct a Pair of Dual Moving Coil Speakers |
| Author | A.C.Munro |
| Notes | Speech coil, development of cone, spider, mounting the speakers, details and dimensions of spider |