Fostex FE 103a 70th Anniversary Fullrange Chassis - Price per Pair!

-41 %

RRP 849,00 €

1 pair | 499,00 € €/pair
incl. 19% VAT (Deutschland) plus shipping
on stock Only 2 units remaining!
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-41 %

Fostex FE 103a 70th Anniversary Fullrange Chassis - Price per Pair!

Fostex is getting ready to produce a Limited Edition run of this brand new retro anniversary edition driver. Full payment is due at time of preorder. No cancelations or refunds once your order is placed. A 25% re-stock fee applies to any return, pending inspection. Expected delivery date is late January 2020. We will keep you updated on the ETA once production is complete. 

Fostex FE103A 4" Alnico Full Range - Foster 70th Anniversary Limited Edition - Pair


A pair of the components come in a beautiful wooden display box with a brass plate of the original Foster name logo in Japanese that celebrates the 70th anniversary of the company foundation. The high dense ES cone diaphragm is made with two-layer paper making technique, achieving further improvement in rigidity and high internal loss. The base layer is mainly made of long fiber pulp to achieve both high rigidity and internal loss due to its bulky structure and the surface layer is blended with short fiber pulp to increase the propagation speed of the diaphragm surface. While maintaining the bright midrange tone, the FE103A delivers sharp and fast high frequency and rich low frequency reproduction. By eliminating the metallic eyelets which causes uneven weight balance resulting in unequal split resonance over the annular vibration mode of the cone-shaped diaphragm, the unwanted harmonic distortion in the midrange has been reduced. The pocket neck spider method is adopted to for three-point adhesion that adheres the voice coil, the damper and the cone paper on the same circumference while realizing the above-mentioned eyelet-less design. Alnico magnet and a copper cap on the pole piece reduces electric distortion improves clarity of mid-high range. A low-loss gold-plated terminal with Faston 205 type connector has been adopted. (QC205R & QC205B)

Short data

Usage as Fullrange
Power Handling 5 Watt
Impedance 8 Ohm
Frequency from 79 Hz
Max. Frequency 20 kHz
Sound pressure 88 dB


Overall dimensions 115 mm
Baffle cutout 92 mm
Depth (Total) 68 mm
Membrane Type Cone
Membrane Surround Rubber
Membrane Material Paper-Wood-Fibre
Voice coil Ø 20 mm


Resonance fs fs: 79 Hz
Mechanical Q Qms: 6.15
Electrical Q Qes: 0.66
Total Q Qts: 0.6
Equivalent Air-Volumen Vas: 5.47 Liter
DC-Resistance Re: 6.7 Ohm
Coil Inductance Le: 0.1 mH
Mech. Compliance Cms: 1.53 mm/N
Moving Mass Mms: 2.66 g
BL Product Bl: 3.65 N/A
Membrane Area Sd: 107 cm²

Frequency & Impedance

Technical drawing

PDF-Product information

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