If you have an interest in vintage analog audio, the W9 is a fascinating project—but it comes with caveats.
While versions varied by customer request, the classic McGraw Hill W9 Portable adhered to these general specs: mcgraw hill w9 portable
...then the W9 remains an unbeatable choice. If you have an interest in vintage analog
Due to its full-track recording (which leaves no guard band between tracks, making it harder to detect editing), the W9 was adopted by certain federal agencies. The absence of a "record" light (a user-modifiable feature) made it a tool for covert depositions. making it harder to detect editing)