Fountek FW100B 4″ Aluminum Cone Midwoofer
Overview:
The Fountek FW100B is a robust 4″ midwoofer that features an attractive aluminum cone, a durable cast-aluminum frame, and an optimized motor structure for low distortion and excellent detail.
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Highlights:
- Lightweight aluminum cone for fast transient response
- Large spider for linear excursion
- Smooth response for natural sound
- Common sized pincushion frame
Product Description:
Fountek midrange drivers offer an exceptional value while offering premium features such as aluminum cones, robust cast frames, and optimized low-distortion motors. They’re the perfect choice for use in high-end loudspeaker systems, paired with premium-quality tweeters like Fountek’s own ribbon units.
Fountek’s FW100B model is a 4″ midwoofer with an extended upper range that allows it to be used as a midbass driver, or as a woofer together with a dedicated midrange for further reduced distortion. The satin anodized-aluminum cone perfectly complements the other Fountek midwoofer drivers.
Product Specifications:
Nominal Diameter | 4″ |
Bolt Circle Diameter | 4.51 |
Moving Mass Of Diaphragm (Mmd) | 8.04 |
Power Handling (RMS) | 35 Watts |
Power Handling (MAX) | 70 Watts |
Impedance | 8Ω |
Frequency Response | Â 77 to 4,500Hz |
Sensitivity | Â 84dB 2.83V/1m |
Voice Coil Diameter | 1″ |
Thiele Small Parameters:
Resonant Frequency (Fs) | 77Hz |
DC Resistance (Re) | 6.2Ω |
Maximum Linear Excursion (Xmax) | 4mm |
Mechanical Q (Qms) | 3.09 |
Electromagnetic Q (Qes) | 0.79 |
Total Q (Qts) | 0.63 |
Compliance Equivalent Volume (Vas) | 0.08ft³ |
Mechanical Compliance of Suspension (Cms) | Â 0.49mm/N |
BL Product (BL) |  5.59T·m |
Surface Area of Cone (Sd) |  55.42cm² |
Materials of Construction:
Cone Material | Aluminum |
Voice Coil Wire Material | Copper |
Voice Coil Former | Aluminum |
Basket / Frame Material Cast | Aluminum |
Magnet Material | Ferrite |
Mounting Information:
Overall Outside Diameter | Â Â Â Â Â Â Â Â Â Â Â Â Â Â 4.11″ |
          Baffle Cutout Diameter |              3.98″ |
               Depth |             2.36″ |
          # Mounting Holes |               4 |
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion):
Sealed Volume |              0.088ft³ |
              Sealed F3 |              104.3Hz |
             Vented Volume |              0.193ft³ |
              Vented F3 |               50.56Hz |
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