Fostex FE103E Fullrange Speaker Driver
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Fostex FE103E Fullrange Speaker Driver
Note - this driver has been discontinued and is no longer being produced. The Fostex FE103En is the replacement driver. The Fostex FE103E is a 100 mm (4") full-range driver. Like most Fostex speaker, the FE103E is well built and it sounds excellent. The FE103E can be used in a wide variety of enclosures ranging from simple bass reflex, Transmission Line, Quarter Wavelength and Back Loaded Horn enclosures. The full-range driver is capable of an extended frequency response from about 80Hz to 20kHz. In the proper enclosure 50Hz in room bass response can be attained. The cone is made of banana plant fiber and thus it is fairly light. The magnet is large, almost 200 grams.
Fostex FE103E Fullrange Driver
Like the other inexpensive Fostex drivers, the frame is stamped steel so it should benefit from some damping. For an example of some of the modifications and tweaks one can try on these little drivers, see the modifications and tweaks for the Fostex FE103En fullrange speaker driver.
T/S Parameters - Fostex FE103E Driver
The Thiele/Small Parameters for the Fostex FE103E driver provided by Foxtex are shown in the table below.
| Parameter | Fostex |
| Fs | 79.5 Hz |
| Vas | 6.9 L |
| Qts | 0.36 |
| Qes | 0.40 |
| Qms | 2.87 |
| Re | 7.45 Ohms |
| Le | n/a |
| SPL | 89 dB |
T/S Parameters - Fostex FE103E Fullrange Driver
Datasheet - Fostex FE103E
- Fostex FE103E Datasheet - (PDF - 91kB)
Enclosure Plans and Projects Links - Fostex FE103E
- Zigmahornet Speakers with Fostex FE103E
- Fostex FE103E Recommended Enclosure - (PDF - 41kB)
- Fostex FE103En Fullrange Speaker Driver