You can switch it from 2 channel to 4 channel.
Covered in a mottled brown, leather type material.
Each ear plate houses have 2 speakers, which provide the balance sound, externally they are labelled left/right and front/rear.
Left plate houses the 2/4 channel switch. the cable has front/rear label too. Two plugs are all 6.3 mm phone connectors. The headphone has a adjustable headband and stop with two screws.
Manufacturer / Brand: Toshiba Corporation; Tokyo
Shibaura Engineering Works
Brand Tokyo Shibaura
Year: 1973 ? Category: Loudspeaker, headphone or earphone
Wave bands - without
Loudspeaker - Is a Headphone or Earphone
Model: HR40 - Toshiba Corporation; Tokyo
Material Various materials
- Quadrophonic headphones.
- 4 channel / 2 channel switcher.
- Each 2 dynamic LS systems, 20-20000Hz, 4 x 1mW
- Impedance 8 oHm