FF85WK
8cm full range
FF-WK series bass-reflex full-range units: New paper-making method "double-layer paper cone" & "ridge dome-shaped aluminum alloy center cap".
Features
Dual-layer paper cone, ridge-dome shaped aluminum alloy center cap,
pocket-neck damper for even higher sound quality.
The FF-WK series is a full-range unit designed exclusively for bass-reflex, with the structure of the existing FF series completely revised and a new 10cm diameter unit added to the lineup.
The FF-WK series features a new paper-making method called “double-layer paper cone,” a ridge-dome aluminum alloy center cap, and a pocket-neck damper, which have realized reproduction of low frequencies with full power and high frequencies with no character, while maintaining a clear and realistic sound quality.
Double-layer paper cone/new up-rolled edge material
Two-layer papermaking is a unique technology in which cone paper is papermade in two steps to form a single sheet of cone paper with two layers: a base layer and a surface layer.
In the FF-WK series, the base layer is made of long-fiber (low-fatting) wood pulp, which provides high rigidity and moderate internal loss due to its sublime structure, and the surface layer is made of short-fiber (high-fatting) kenaf and bincho charcoal powder, which increases the propagation speed on the surface of the cone paper.
The edge shape is up-rolled to achieve a high stroke, and polycarbonate urethane foam is used as the material, which is a special blend of polycarbonate materials possessing the contradictory properties of high loss and high Young’s modulus.
The color tone on the surface of the cone paper of the FF-WK series is caused by bincho charcoal and no dyes are used.
Therefore, the color tone of the cone paper surface varies individually.
Ridge-dome aluminum alloy center cap / mechanical 2-way structure
Ridge-dome aluminum alloy center cap is used.
Strong resonance at specific frequencies is dispersed and weakened to reduce coloration in the high frequency range.
In addition, by directly connecting it to the voice coil bobbin, the reproduction bandwidth of the high frequency range is extended.
3-point adhesion system / Pocket neck damper
Three-point adhesion method is adopted, where the cone paper, damper, and voice coil are bonded at the same point.
By increasing the strength of the cone neck, the high frequency characteristics are improved.
In addition, a pocket shape in the damper neck section enables three-point bonding even while using a relay wire for the voice coil.
Faston 205 gold-plated connection terminals
In order to minimize changes in sound quality, gold-plated Faston 205 type terminals are used for input terminals.
Specifications
Main Specifications
| impedance | 8 Ω |
|---|---|
| Lowest resonant frequency | 115 Hz |
| Playback frequency band | fo~28 kHz |
| Output sound pressure level (1m/1W) | 86.5dB |
| input | 15 W(Mus.) |
| mo | 2.0 g |
| Qo | 0.55 |
| Effective vibration radius (a) | 3.0 cm |
| Magnet mass | 187 g |
| gross mass | 0.45 kg |
| Baffle opening dimensions | (Φ73 mm) |
| Standard enclosure method | bass-reflex |
| Standard Enclosure Inner Volume | 3.5 L |
| Recommended speaker box | BK85WK |
frequency response
Enclosure Dimensions
External dimensions
List of External Dimensions
| model number | A | B | c | D | E | f | g | Baffle mounting holes |
|---|---|---|---|---|---|---|---|---|
| FE83En | 70mm dia. | φ83 | 45.3 | 4-4x 6 long holes | diameter (mm) | Φ60 |
43.3 |
Dia. 73 |
| FE103En | phi92 | Dia. 107 | 45.5 | 4-5x 6 long holes | Dia. 115 | Φ80 |
43 |
diameter (units assumed, esp. mm) |
| FE126En | φ102.2 | Dia. 117. | 61 | 4-φ 5 hole | φ126 | 100 mm dia. |
58.4 |
φ104 |
| FE166En | 143.6mm dia. | φ166 | 75.7 | 4-φ 5 hole | φ174 | Φ110 |
72 |
φ146 |
| FE206En | diameter (units assumed, esp. mm) | φ208 | 87.9 | 4-φ 5 hole | φ220 | Φ145 |
84.4 |
185mm dia. |
| FF85WK | φ71 | φ83 | 46.7 | 4-4x 6 long holes | diameter (mm) | 65mm diameter | 43.3 |
*Refer to the diagram. |
| FF105WK | φ92 | Dia. 107 | 52.8 | 4-5x 6 long holes | Dia. 115 | diameter 85mm | 48.8 |
diameter (units assumed, esp. mm) |
| FF125WK | φ102.2 | Dia. 117. | 61.3 | 4-φ 5 hole | φ126 | 90mm dia. | 57.5 |
φ104 |
| FF165WK | 143.4mm dia. | φ166 | 76.6 | 4-φ 5 hole | φ174 | 120mm dia. | 72 |
φ146 |
| FF225WK | diameter (units assumed, esp. mm) | φ208 | 91.7 | 4-φ 5 hole | φ220 | 145mm dia. | 86.5 |
185mm dia. |
| FE108EΣ | diameter 98mm | φ128 | 65 | 8-φ 5 hole | Dia. 115 | Φ90 |
56.5 |
100mm dia. |
| FE168EΣ | φ146 | 190mm dia. | 88 | 8-φ 6 hole | φ174 | 120 mm dia. |
74.4 |
φ151 |
| FE208EΣ | diameter (units assumed, esp. mm) | 230mm dia. | 107 | 8-φ 6 hole | φ213 | Φ156 |
93.5 |
185mm dia. |
| FX120 | Dia. 103 | Dia. 123 | 62.5 | 4-φ 4.5 hole | φ126 | - |
54.5 |
φ104 |
| F120A | Dia. 103 | Dia. 123 | 89 | 4-φ 4.5 hole | φ126 | - | 81 |
φ104 |
| F200A | diameter (units assumed, esp. mm) | φ194 | 123.7 | 4-φ 6 hole | φ198 | 120 mm dia. |
117.2 |
Dia. 183 |
Unit:mm
*This product complies with the European RoHS Directive.
