FE103A
10cm full range (Foster 70th Anniversary Model)
The FE103A is a speaker unit in a wooden box designed and manufactured to commemorate the 70th anniversary of Foster Electric. It is a special product that retains the style of yesteryear while employing original technology.
Audio Excellence Award 2020 Special Prize
We received a special award in the “Audio Excellence Award 2020” sponsored by Ongen Publishing Co.
Features
The unit is housed in a wooden box with the company name and a brass plate with the company's name on it.
The design maintains the dignity of a commemorative gift and can also be displayed.
2-layer paper cone
The cone paper is made of two-layer ES cone, which has thin, flexible, and high-density fibers, to achieve further improvement in rigidity and internal loss despite its light weight. The base layer is made mainly of long-fiber pulp to achieve both high rigidity and internal loss, while the surface layer is made of short-fiber pulp to increase the propagation speed on the diaphragm surface. The surface layer contains short fiber pulp to increase the propagation speed of the diaphragm surface. This enables reproduction of sharp highs and thick lows with good rise time, while maintaining the bright and taut tone of the mid-range.
The two-layer papermaking is a unique technology in which the diaphragm is made in two stages, with the base layer and surface layer making up a single diaphragm.
Low distortion in the midrange due to dove-less
The weight of the diaphragm added by the weight of the pigeonholes results in an unequal weight balance, causing unequal division resonance in addition to the circular vibration mode of the cone-shaped diaphragm, which causes distortion in the midrange.
Adoption of pocket neck damper
The pocket-neck damper system is used to achieve the aforementioned pigeonholing and to realize three-point bonding where the voice coil, damper and cone paper are bonded on the same circumference.
Alnico magnet with copper cap
Alnico magnets are used for the magnets, and copper caps are placed on the pole pieces in the magnetic circuit to reduce current distortion, further improving the clarity of the mid and high frequencies through low distortion in the drive system.
Gold plated terminals
Faston 205 type low-loss gold-plated terminals are used for the input terminals. In addition to secure joints for speaker cables, this prevents deterioration of sound quality.
Specifications
Main Specifications
| Electrical Parameters | |
|---|---|
| Nominal Impedance | 8 ohm |
| Re | 6.7 ohm |
| Le | 0.1 mH |
| fs (F0) | 79 Hz |
| Mechanical Parameters | |
| Mms (M0) | 2.66 g |
| Cms. | 1.53 mm/N |
| BI | 3.65 N/A |
| Loss Factors | |
| Qms. | 6.15 |
| Qes. | 0.66 |
| Qts (Q0) | 0.60 |
| Other Parameters | |
| SPL (1m/1W) | 88 dB |
| Equivalent Diaphragm Radius (a) | 40.0 mm |
| Rated Input | 5 W |
| Overall Diameter | 107 mm |
| Voice Coil Diameter | 20 m |
| Reproduction Frequency Response | fs to 20kHz |
| Vas. | 5.47 L |
| Baffle Hole Diameter | 93 mm |
| Weight | 600g/pc |
Frequency Response Chart
External dimensions
Attention
The instruction manual is not included with this product. Please refer to our website for product specifications.
No screws are included with this product.
The gasket (packing) is packed with the speaker unit attached.
The wooden box containing the product is a packing box. It is not an enclosure box.