Fostex FE83A-VB 3" Fullrange with Alnico Magnet

Fostex FE83A-VB 3" Fullrange with Alnico Magnet 

Spec Sheet PDF

P800E Enclosure

The traditional full-range FE series now features Alnico magnets, with an 8cm regular model now available.

Since the introduction of the FE103 full-range speaker unit in 1964, the FE series has featured ferrite magnets, with the exception of limited editions. This series employs premium Alnico magnets, highly regarded by audiophiles. While preserving the traditional FE sound—vibrant, bright, and transparent—it delivers richly expressive, dynamic, smooth, and pleasant high-quality reproduction. The “A” Series, featuring Alnico magnets and joining Fostex's proud full-range tradition, presents a special regular lineup of 8cm and 10cm models. These models maximize the potential of Alnico magnets through cutting-edge technology.

• Alnico Magnet Implementation

For the first time in the regular FE series, we’ve implemented the renowned Alnico magnet, celebrated for its expressive and pleasant sound quality. Additionally, copper caps are placed on the pole pieces within the magnetic circuit to reduce current distortion. This lowers distortion in the drive system, further enhancing clarity in the mid-to-high frequencies.

• Double-Layer Paper Cone

The cone paper utilizes a double-layer construction of ES cone, featuring fine, flexible fibers and high density. This achieves greater rigidity and internal damping while maintaining light weight. The base layer, primarily composed of long-fiber pulp, provides high rigidity and internal damping through its high-bulk structure. The surface layer incorporates short-fiber pulp, increasing the propagation speed across the cone surface.This enables reproduction of bright, taut midrange tones while delivering crisp, well-defined highs and rich, substantial bass.

*Two-layer paper (patented) is our proprietary technology, a manufacturing method where a single diaphragm is formed from two layers—base and surface—through a two-stage paper-forming process.

• Reduced midrange distortion via eyelet-less design

The weight of the eyelet added to the diaphragm caused uneven weight distribution. This induced unequal division resonance in addition to the circular vibration modes inherent to cone-shaped diaphragms, contributing to midrange distortion. Eliminating the eyelet reduces harmonic distortion in the midrange.

• Pocket Neck Damper

To achieve the aforementioned eyelet-less design while enabling three-point bonding—where the voice coil, damper, and cone paper are bonded on the same circumference—the pocket neck damper method is employed.

• Gold-Plated Terminals

The input terminals utilize low-loss gold-plated Faston 205-type connectors. This ensures reliable connection of the speaker cable while preventing sound quality degradation.