| Year | 1934 |
| Date | 01-Feb |
| Volume | 70 |
| Issue | 1,708 |
| Page | 109 |
| Category | Electrical |
| Part | |
| Title | How to Construct a Pair of Dual Moving Coil Speakers |
| Author | A.C.Munro |
| Notes | Sectional side and end elevation of single speaker, magnet pot, bobbin for field winding, cone chassis |