Other orthodynamic headphones
Other Iso/orthodynamic Headphones General Information
Orthodynamic headphones were very popular worldwide (if not so much in the US) in the 1970s. Several companies manufactured such headphones or the parts for them, and numerous others contracted with those Original Equipment Manufacturers (OEMs) to make parts or complete headphones for them to sell under their band names. Therefore you will see a lot of OEM headphones (or clones, if you will) in the list below. Fostex and PMB OEM heaphones are by far the most common. The list is in no way a comprehensive list and is being changed and updated all the time.
DIANGO / NEC
Pacific Stereo Concept
Bang & Olufsen
Few facts about OEM headphone groups and original manufactures:
1) The following are most likely based on the Peerless lineup (PMB OEMs):
- 110 ohm driver: Peerless PMB8: DUAL DK 720, SABA PRO 90
- 120 ohm driver: Telefunken TH700, Grundig GDHS224 (different drivers)
- 140 ohm driver: Peerless PMB 6: DK 830/330/220, Saba H30, BO U70, Goodmans OHP10
- 150 ohm driver: PMB100: Burwen PMB8
(note that the drivers can be different even when the resistance is the same)
2) There are also Fostex OEM headphones, all made by the Rand organization.
3) There are currently no known Yamaha OEM headphones.
4) SAWAFUJI made orthodynamic drives that were most likely used in ATH-1, ATH-2 and Realistic Pro30 headphones as well in their own Japan only headphone lineup.