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        W 140.38 Fibonacci 5.5" Bass-mid woofer

        RS Speakers W 140.38 Fibonacci 5.5" Bass-mid woofer

        €144,95

        4 In stock

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        RS Speakers W 140.38 Fibonacci 5.5" Bass-mid woofer

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        Brand: RS Speakers
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        5.5" | 8 Ω
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        € 119,79€ 144,95 4 In stock
        • -5% Purchase 4 for only € 137,70 per piece
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        • At least two years warranty
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        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        W 140.38 Fibonacci 5.5" Bass-mid woofer

        Pros and cons

        According to our specialists
        • Sealing gasket, fixing screws and T-nuts included
        • Features patented “Fibonacci” cone technology

        Product description RS Speakers W 140.38 Fibonacci Bass-mid woofer

        The RS Speakers W 140.38 Fibonacci Bass-mid woofer is a premium 5.5-inch driver that combines innovative Italian engineering with patented technologies to deliver exceptional sound quality. Featuring a unique custom paper pulp cone with a Fibonacci-inspired design, this woofer is crafted for audiophiles seeking clarity, low distortion, and a pure listening experience. Its advanced construction boasts a dual-asymmetric rubber surround, progressive Conex spider, and a high-performance ferrite magnet circuit, making it an excellent choice for high-end home audio systems and demanding DIY speaker projects.

         

        Highlights of the RS Speakers W 140.38 Fibonacci

        • Patented “Fibonacci” custom paper pulp cone for reduced resonance and enhanced rigidity
        • Double surface damping treatment for balanced rigidity and damping
        • 1.5” voice coil on a fiberglass former for high thermal resilience
        • Ferrite magnet circuit with aluminum demodulating ring for low distortion
        • Includes sealing gasket, mounting screws, and griff nuts for practical installation.

         

        Product details RS Speakers W 140.38 Fibonacci

        RS Speakers W 140.38 Fibonacci 5.5” Woofer 8 Ohm

         

        The heart of the W 140.38 Fibonacci is its meticulously engineered diaphragm, which uses a custom para-elliptical profile and a laser-etched Fibonacci sequence pattern. This innovative design, inspired by the Golden Ratio, minimizes unwanted resonance modes and increases cone rigidity exactly where it is needed most. The result is a remarkably clean and natural sound character, making this woofer a standout in the speakers category for both home audio enthusiasts and professional builders.

         

        Performance is further enhanced by the woofer’s double surface damping treatment, which creates a “sandwich” structure with acrylic and damping layers. This approach strikes a balance between stiffness and internal damping, effectively controlling cone break-up and unwanted coloration. The specially designed NBR butyl rubber surround utilizes Double Asymmetric Rolls technology, ensuring symmetrical and linear excursion even at high output levels. Combined with a progressive Conex spider, the mechanical design supports extended excursion while maintaining precise control.

         

        At the core of the motor assembly, the 1.5-inch voice coil is wound on a fiberglass former, providing excellent mechanical stability and heat resistance during demanding sessions. The ferrite magnet circuit incorporates an aluminum demodulating ring, significantly reducing coil inductance and harmonic distortion. Ventilation for both the magnet and voice coil helps to minimize power compression, ensuring consistent performance even in high-power applications. With a sensitivity of 86.2 dB at 1W/1m and a power handling of 120W AES (240W program), the W 140.38 Fibonacci is ready to excel in a wide range of woofers and midbass duties.

         

        Designed for flexibility, this woofer is ideal for use in custom loudspeaker systems, high-fidelity home audio setups, or ambitious DIY speaker kit projects. Its thoughtful mounting features, including a free compression basket design with thin spokes to eliminate rear reflections, and the inclusion of a sealing gasket, fixing screws, and griff-nuts make installation straightforward. Whether you are upgrading an existing system or building from scratch, the RS Speakers W 140.38 Fibonacci delivers uncompromising performance and sonic purity.

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        Specifications

        Article number
        W 140.38 Fibonacci
        EAN
        9509198684951
        Woofer Series
        Fibonacci
        Woofer Type
        Woofer
        Nominal Diameter
        5.5 " | 140 mm
        Power Handling (RMS)
        120 W
        Continuous Program Power
        240 W
        Impedance (Z)
        8 Ω
        Sensitivity (SPL at 1m / 2.83V)
        86.2 dB
        Voice Coil Diameter
        38 mm
        Magnet Weight
        515 g
        DC Resistance (Re)
        5.1 Ω
        Voice Coil Inductance (Le)
        0.68 mH
        Resonant Frequency (Fs)
        46.6 Hz
        Mechanical Q (Qms)
        4.65
        Electromagnetic Q (Qes)
        0.45
        Total Q (Qts)
        0.41
        Diaphragm Mass Inc. Airload (Mms)
        13.8 g
        Mechanical Compliance of Suspension (Cms)
        854 µm/N
        Surface Area of Cone (Sd)
        78.5 cm²
        BL Product (BL)
        6.80 Tm
        Compliance Equivalent Volume (Vas)
        7.4 L
        Maximum Linear Excursion (Xmax)
        5.0 mm
        Cone / Diaphragm Material
        Paper
        Surround Material
        Rubber
        Voice Coil Wire Material
        Copper
        Voice Coil Former
        Fiberglass
        Basket / Frame Material
        Aluminium Die-Cast
        Magnet Material
        Ferrite
        Overall Outside Diameter
        148 mm
        Overall Depth
        72 mm
        Baffle Cutout Diameter
        113 mm
        Bolt Circle Diameter
        138 mm
        # Mounting Holes
        6
        Mounting Hole Diameter
        4.2 mm
        Vented Volume
        9 L
        Vented F3
        45 Hz

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        W 140.38 Fibonacci 5.5" Bass-mid woofer
        € 119,79
        € 144,95
        W 140.38 Fibonacci 5.5" Bass-mid woofer
        4 In stock
        Add to cart
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