3. Illuminator 18WU/8747T00

Illuminator 18WU/8747T00

80 Watt

Illuminator 18WU/8747T00

Technical Highlights

  • Efficiency 85.5 dB, impedance 8 ohms, power up to 150 W.
  • Frequency range from 30 Hz to 2500 Hz, linear excursion ±9 mm.
  • Resonance at 32 Hz, voice coil 42 mm, cone area 154 cm².
  • More technical details
€339.00
€339.00 €339.00
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ProductIlluminator 18WU/8747T00

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datasheet
Two black round Scanspeak Illuminator 18WU/8747T00 speakers with visible aluminum cones and mounting holes, shown on a white background.
€339.00
€339.00 €339.00

The Illuminator 18WU/8747T00 from Scanspeak is a 6.5" (16.5 cm) mid-woofer that stands out due to a range of special features. The construction includes a underhung voice coil with neodymium drive as well as a patented aluminum diaphragm, both aimed at a low-loss performance. Thanks to the symmetrical drive technology SD-3 and the exceptionally large linear excursion, low distortion is ensured in the frequency range of 30 Hz to 2500 Hz. With a power handling of 80/150 W and an impedance of 8 Ohm, this speaker offers high sound quality. Additionally, it impresses with a sensitivity of 85.5 dB and an impressive long-standing experience from Scanspeak in audio technology.

Features
  • 6.5" (17cm) mid-woofer
  • Underhung voice coil with neodymium drive
  • Patented aluminum diaphragm/cone
  • Low-loss linear suspension
  • Patented symmetrical drive (SD-3)
  • Exceptionally large linear excursion

    Specifications
    • Power handling (nominal/music) = 80/150 W
    • Frequency range = 30-2500 Hz
    • Resonance frequency fs = 32 Hz
    • Impedance R = 8 Ohm
    • Sensitivity SPL = 85.5 dB (2.83V; 1m)
    • DC resistance Re = 5.9 Ohm
    • Force factor BL = 6 N/A
    • Voice coil inductance L = 0.41 mH
    • Effective diaphragm area Sd = 154 cm2
    • Moving mass including air load mms = 17 g
    • Equivalent volume Vas = 48.3 l
    • Free air total Q factor Qts = 0.28 (Qms=3.42, Qes=0.3)
    • Voice coil diameter = 42 mm
    • Linear excursion xlin = +/- 9 mm
    • Mounting diameter d = 158 mm
    • Outside diameter d = 184 mm
    • Mounting depth (not recessed) t = 105 mm

    datasheet

    Open data sheet

    Frequently Asked Questions about Illuminator 18WU/8747T00

    What is the power rating of the Scanspeak Illuminator 18WU/8747T00 speaker?

    The Scanspeak Illuminator 18WU/8747T00 is designed to provide a nominal power handling of 80 watts and a music power handling of 150 watts. These power ratings allow the speaker to deliver precise sound results at both quiet and very loud music passages without producing distortion. If you enjoy listening to music at high volumes, you will benefit from this power handling. The impedance of 8 Ohm additionally contributes to amplifier compatibility and ensures efficient conversion of electrical signals into acoustic waves.

    How is the frequency response of the test product?

    The Scanspeak mid-woofer covers a frequency range from 30 Hz to 2500 Hz, making it ideal for deep bass and clear midrange tones. The ability to cover such a wide range is made possible by the patented symmetrical drive SD-3 and the underhung voice coil with neodymium drive. These features enable detailed reproduction, whether in bass lines or the mid-frequency range, which is particularly advantageous for complex musical pieces or films.

    What are the special features of the aluminum diaphragm?

    The patented aluminum diaphragm of the Scanspeak speaker is characterized by its lightness and stiffness, which are essential factors for minimizing distortion. The low weight of the diaphragm allows for quick movements, enabling clear and precise reproduction of fast bass sequences. Additionally, the stiffness ensures that the speaker does not 'flutter' and produces clean sound waves. All of this contributes to a more transparent and uncolored sound image, which is a crucial point for audiophiles.

    What technical specifications influence the sound quality of the product?

    Various technical parameters contribute to the outstanding sound quality of the 18WU/8747T00 speaker unit. The rated sound pressure level of 85.5 dB at 2.83V and 1m ensures high efficiency in sound conversion. The complete system also features an exceptionally large linear excursion of +/- 9 mm. These characteristics, combined with the free-air total quality factor of Qts = 0.28 (Qms=3.42, Qes=0.3), enable extremely precise and distortion-free reproduction across the permissible frequency range.

    What dimensions are important for installing the Scanspeak speaker in the car?

    When installing in a vehicle, the dimensions of the speaker are critical. The cutout diameter is 158 mm, while the outer diameter reaches 184 mm. Additionally, the speaker has a mounting depth of 105 mm. These factors should be considered when choosing the installation location to ensure the best possible fit. Especially in vehicles with areas of limited depth, the mounting depth should not be overlooked to avoid any obstacles.

    How does the underhung voice coil affect performance?

    The underhung voice coil of the Scanspeak 18WU/8747T00 is specifically designed for low distortion and precise sound reproduction. By using a neodymium drive, the voice coil achieves higher magnetic efficiency, which is particularly noticeable through greater control over the diaphragm movement. This technology minimizes harmonic distortions and improves the dynamic range, leading to above-average audio performance, especially at high and low volumes, which impresses in both music and film material.

    How does the symmetrical drive SD-3 contribute to sound quality?

    The patented symmetrical drive SD-3 from Scanspeak is crucial for the excellent reproduction accuracy of the speaker. It ensures a symmetrical movement of the diaphragm, which increases the linearity of the excursion. This technology helps reduce unwanted resonances and modal interferences, which is particularly beneficial in critical listening situations. Minimizing distortion and maintaining a smooth frequency response are central factors that both audiophiles and technology enthusiasts appreciate.

    What parameters play a role in selecting the speaker?

    When selecting the Scanspeak 18WU/8747T00, several technical parameters are crucial. These include the resonance frequency of 32 Hz, which ensures deep bass reproduction, as well as the force factor BL of 6 N/A, which affects the effectiveness of the motion control. The voice coil inductance of 0.41 mH offers advantages in impedance behavior, which is particularly helpful when integrating into existing audio systems. These details are essential when you are looking for a speaker that meets your needs both sonically and technically.

    How does the diaphragm area Sd affect sound reproduction?

    The effective diaphragm area of 154 cm² of the Scanspeak 18WU/8747T00 has a significant impact on the generated sound pressure and reproduction quality. With a larger area, more air can be moved, which is especially important at low frequencies to produce a rich and full bass sound. A larger diaphragm area also allows for accurate reproduction of instrument sounds and creates a spatial feeling that combines detail depth and precision. In the audio world, this is an indispensable feature for realistic sound reproduction.

    How does the moving mass mms relate to sound fidelity?

    The moving mass of 17 g plays an important role in the sound fidelity of the speaker. A lower moving mass allows for quicker responses to the incoming audio signal, leading to more detailed reproduction. The balanced combination of lightness and robustness of the moving parts in the Scanspeak speaker results in precise motion tracking and minimal distortion, which is evident in any type of music enjoyment. Thanks to this mass, both precision and speed in signal processing are optimized.

    Manufacturer information/responsible person

    Audio Components B.V.
    Koen Pronk, Martijn Ouwerkerk
    Peizerweg 97a
    9727AJ Groningen
    Netherlands

    Contact: info@audio-components.com

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