Other orthodynamic headphones

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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.

Iso/orthodynamic Headphones


Brand Model

Audeze



HiFiMan

.

.


Dual

.

.

.


DENON


DIANGO / NEC


Akai

.


Aiwa


Telefunken


Kenwood (Trio)





.


Grundig

.


Sansui

.


Saba

.


Tandberg


Realistic


Pacific Stereo Concept


Maior


NAD


Lafayette


Heco


Wharfedale

.


RFT

.


Goodmans


PWB


Leak


Magnat


Bang & Olufsen


Hosiden


ELEGA


.


Canton


Victor




.


Sawafuji



.


Eagle


Otto


Burwen

.


Watson

LCD-1

LCD-2


HE-5

HE-5LE

HE-6


DK-220

DK-330

DK-720

DK-830


SH-90


AUH-15


ASE-50

ASE-40-J


HP-500


TH-700


KH-72

KH-92

KH-73

KH-83

KH-85B

KH-85W


GDHS-223

GDHS-224


SS-L55

SS-100


H 30

Professional 90


TH18


Pro 30


CE-H


RPT-50


RP18


RP-50


PHI 300


ID1 Isodynamic

ID2 Isodynamic


HOK 80

HOK 80-2


OHP-10


Dyna-X


Leak 3000


RT-10


U70


DH-80-S


FR-901C

FR-902C

FR-907C


KE-600


HP-D90

HP-D70

HP-D50

HP-D30

HP-D35


SF-1

SF-7ST

SF-16

SF-17


H4300


E-1000


Burwen PMB-6

Burwen PMB-8


Watson Mod.930


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.

Brochures and Various Pictures

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