LSiM 704C Centre Channel Speaker

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    Tired of turning your system up to hear the dialogue and down because the effects are too loud? Then put your money in a high performance centre channel speaker like the LSiM 704C. Big enough to stand up to the power of floorstanding LSiM 705 or LSiM 703 bookshelf speakers, you can use this centre channel speaker to perfectly match the size and performance you’re looking for. The LSiM 704C has all the earmarks of a great centre: crystalline detail, fast natural midrange and impactful bass. With its dynamic sonic engine, twin 5 1/4-inch woofers and a dual PowerPort® venting system, the LSiM 704C will reveal the whisper, the shout and the thump-thump of the helicopter flying over.

    LSiM 704C Features:

    • Polk’s exclusive dynamic sonic engine design optimises the midrange driver and the ring radiator tweeter in separate interior chambers for improved transient response, superior imaging and greater horizontal off-axis response.
    • Enhanced, reengineered ring radiator tweeters extend top-end response for incredible details and realistic imaging.
    • Our innovative overhung voice coil design augments the excursion length for subwoofer drivers, increasing their power-handling capabilities and enhancing bass response.
    • Extended Linear Motion voice coil design allows lots of movement in a limited space, eliminating impedance and extending mid- and high-frequency response.
    • Lightweight, rigid cast aluminium baskets are designed for precision motor alignment with unobstructed linear movement and ample venting.
    • Klippel motor optimisation uses laser measurement technology to ensure a smooth excursion path at either end of the volume spectrum for uniform performance at both low and high volumes.
    • Polk’s proprietary, patented Dynamic Balance® technology allows our engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.
    • Our super cell aerated polypropylene cone is the ideal balance of lightweight stiffness (for more efficient action with less distortion-causing flex) and superior damping properties.
    • Durable, computer-modeled, injection-moulded butyl rubber surrounds suppress unwanted cone resonances for a lifetime of reliable sound.
    • High quality, heavy duty LSiM enclosure construction features 1.0" MDF on the sides, 3/4" MDF on the back and bottom and 1 1/4-inch baffles with substantial internal bracing and separate interior cabinetry for each driver. These exceptionally robust materials efficiently eliminate cabinet resonances and standing waves for less distortion and more dynamic transparency.
    • Beautiful furniture-grade hardwood veneer cabinet finishes, with sleek trim accents and no visible screws.
    • Super-thin zero-diffraction grilles lock in place magnetically, and never obscure your sound.
    • PowerPort® bass venting is Polk’s patented design for smoothly transitioning the air flow from the port into your listening area, eliminating turbulence and distortion, for bigger, more efficient, deep bass impact.
    • All Polk loudspeakers are timbre-matched within their series, designed with the same components throughout, to achieve seamless speaker-to-speaker blending effects in multi-channel systems.
    • Dual gold-plated, professional-style 5-way binding posts, for the most secure connection options.
    • Dual binding posts allow bi-amp or bi-wire connections, for the ultimate in customised high performance audio.
    • All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.

    For more detailed information on the Polk LSIM 704C Centre Channel Speaker, click here.

     

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    Driver Complement

    Tweeter
    Quantity: 1 
    Diameter: 2.54cm
    Type: Dynamic Balance enhanced ring radiator tweeter 

    Midrange
    Quantity: 1 
    Diameter: 8.26cm
    Type: Dynamic Balance driver with super cell aerated polypropylene cone 

    Mid / Woofer
    Quantity: 2 
    Diameter: 13.34cm
    Type: Dynamic Balance driver with super cell aerated polypropylene cone

    Electrical

    Total Frequency Response: 40Hz-40kHz 
    Upper -3dB Limit: 30 kHz
    Lower -3dB Limit: 70 Hz
    Nominal Impedance: 8 ohms
    Efficiency: 88 dB

    Crossover

    Type: Orth crossover design 

    Tweeter/midrange
    Crossover Frequency: 2.5 kHz

    Midrange/midbass
    Crossover Frequency: 280 Hz
    Recommended Amplifier Power: 20-200 watts per channel
    Inputs: Dual gold-plated binding posts

    Dimensions

    Height: 19.68cm
    Width: 53.82cm
    Depth: 23.81cm
    Mid-High Array Enclosure Type: Sealed 
    Midwoofer Enclosure Type: Dual PowerPort bass venting 
    Product Weight (each): 13.20 Kg

     


Collections: LSiM Series, Surround





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