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    Monolith 12" THX Ultra Subwoofer
    Product # 24457
    $799.99
    In Stock This item should ship tomorrow (11/22/2017) if ordered within 19 hours 59 minutes

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    Monolith 12" THX Ultra Subwoofer

    Monolith THX Select Subwoofer


    The Monolith THX® certified subwoofer sets the standard for bass output, low distortion, and affordability. With chest thumping bass that plays down to well under 20Hz, the Monolith subwoofer unleashes cinema level volume, with the ability to convey and articulate the subtle nuances of music.

    THX Ultra Certified
    Woofer
    500 Watt Amplifier
    THX Ultra Certified
    Woofer
    500 Watt Amplifier


    THX Ultra Certified: THX engineers completed hundreds of different scientific tests to ensure the highest audio performance possible. The tests ensure the speaker can reach the high volumes necessary to achieve THX Reference Level without creating audible distortion or artifacts. THX Certified Ultra products are for large sized rooms, up to 3,000 cubic feet in size, with a 10-12 foot viewing distance from the screen.

    12" Woofer: The Monolith 12" driver was developed from the ground up, with a design focus on achieving output, accuracy, dynamics, and linearity, while minimizing distortion. Enclosed in a cabinet made from HDF material, massive internal bracing, and outfitted with dual ports that can utilize a foam plugs to run the subwoofer in a sealed mode.

    500 Watt Amplifier: The 500W RMS amplifier is built around a Texas Instrument 48-bit data path (with 28-bit filter coefficients) and DSP engine. Each amplifier's transfer function, power output limiting and thermal protection are monitored to the millisecond and are customized for each individual driver. The high efficiency Class D amplifier modules are based on a proven topology that has been continuously refined over the past 4 years. The amplifier has vast reserves of power for highly accurate, deep bass for your home theater or music system.


     
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    Performance Class



    THX Ultra
     

    THX Certified Ultra products bring the cinematic experience to large home theaters, 3,000 cubic feet in size, with a viewing distance of 12 feet or greater from the screen.*




    * Previously known as Select2






    Ported (2 ports)


      SPL @ 2m Distortion
    Hz Peak (dB) RMS (dB) THD% 2nd
    Order
    Harmonic
    3rd
    Order
    Harmonic
    16 99.7 96.7 8.1% 3.9% 6.5%
    20 108.3 105.3 9.5% 3.4% 8.0%
    25 112.3 109.3 5.7% 1.3% 5.2%
    31 113.6 110.6 4.3% 2.6% 2.9%
    40 114.2 111.2 4.0% 2.4% 3.1%
    50 114.6 111.6 2.7% 1.5% 2.2%
    63 115.0 112.0 2.6% 1.1% 2.3%
    80 115.4 112.4 1.6% 0.8% 1.0%
    100 115.9 112.9 1.2% 0.7% 0.8%
    125 116.3 113.3 1.2% 0.7% 0.6%


    Ported (1 port)


      SPL @ 2m Distortion
    Hz Peak (dB) RMS (dB) THD% 2nd
    Order
    Harmonic
    3rd
    Order
    Harmonic
    16 101.8 98.8 9.2% 1.3% 8.5%
    20 106.3 103.3 11.7% 5.5% 8.7%
    25 108.5 105.5 8.0% 4.6% 4.5%
    31 110.8 107.8 4.7% 3.2% 2.4%
    40 111.5 108.5 3.6% 2.6% 2.1%
    50 111.9 108.9 2.5% 0.8% 2.1%
    63 112.6 109.6 2.3% 1.3% 1.2%
    80 113.6 110.6 3.3% 1.7% 1.4%
    100 114.3 111.3 1.9% 1.1% 1.5%
    125 115.0 112.0 1.3% 0.8% 0.9%


    Sealed


      SPL @ 2m Distortion
    Hz Peak (dB) RMS (dB) THD% 2nd
    Order
    Harmonic
    3rd
    Order
    Harmonic
    16 95.0 92.0 15.3% 2.4% 13.5%
    20 100.3 97.3 17.1% 3.1% 15.4%
    25 105.4 102.4 12.7% 4.3% 9.9%
    31 108.1 105.1 3.5% 2.0% 2.3%
    40 109.9 106.9 2.9% 1.4% 2.1%
    50 110.9 107.9 2.2% 0.7% 1.2%
    63 112.1 109.1 2.1% 0.9% 0.9%
    80 113.1 110.1 2.6% 1.1% 1.2%
    100 113.9 110.9 2.1% 1.1% 1.7%
    125 114.8 111.8 1.4% 1.0% 0.8%




     
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    Service & Support

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    You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions, both before and after the sale. Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs. Not to be outdone, our friendly and helpful customer service team is here to make your ordering, delivery, and any possible returns a quick and painless operation, from start to finish!





     


    Support Files:



    THX® and the THX logo are trademarks of THX Ltd., registered in the U.S. and other countries.


     
    Model 24457
    Woofer 12" cone
    Cone Material 2 layer long fiber pulp/glass fiber cone
    Voice Coil 60mm with high temperature aluminum wire and black anodized aluminum bobbin
    Surround FEA optimized NBR (nitrile budadiene rubber)
    Motor FEA optimized, 2 aluminum shorting rings, undercut T-pole focused field
    Magnet Ceramic Y35, 2 pcs total 144 oz.
    Xmax 18mm (one-way)
    Xmech 80mm (peak-to-peak)
    Enclosure Sealed or vented HDF cabinet with horizontal and vertical bracing
    Finish Black Ash
    Amplifier Class D 500Wrms
    Frequency Response (-6dB) Sealed Vented (1 port) Vented (2 ports)
         Extended EQ 26-200Hz 19-200Hz 18-200Hz
         THX EQ 29-200Hz 23-200Hz 20-200Hz
    Harmonic Distortion <1% 20-100Hz (90dB @ 1m)
    Variable Level Control +15/-20dB
    Crossover Inline/Bypass variable 40-160Hz
    Inputs RCA (2), XLR
    Outputs XLR
    Signal Turn On Selectable always on/auto
    Auto Turn Off 30 minutes
    Dimensions (H x W x D) 22.8" x 16.7" x 23.6" (580 x 425 x 600mm)
    Net Weight 98.5 lbs. (44.7 kg)
    Gross Weight 125.7 lbs. (57 kg)
     

     
    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 4 questions Browse 4 questions and 3 answers
    Can you add maximum SPL in the various modes (THX, etc.) to the spec sheets for all of these new subwoofers? Thanks!
    Jason G on Sep 2, 2017
    Monolith 12" THX Ultra Subwoofer
    Monolith 12" THX Ultra Subwoofer
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    Monolith 15" THX Ultra Subwoofer
    BEST ANSWER: We will be adding CEA-2010 @2M burst and RMS measurements by frequency in the near future.
    Can you please provide specifications in terms of power requirements for a North American household? I'd like to run 2 of these in my home theater currently under construction and want to know if I can run them both on the same dedicated 15 A circuit... or if I need to run them both on a dedicated 20 A circuit. Thanks!
    A shopper on Oct 27, 2017
    Hello. I just looked at the manual and it appears the 10” goes lower than the 12 according to the manual. Is this correct?
    New User U on Nov 8, 2017
    BEST ANSWER: The 12" subwoofer goes lower and plays louder, as a 12" should. The Monolith 12" subwoofer has a 4 to 6 dB advantage over the 10" at 16Hz and 20Hz.
    Can these sub woofers be positioned on their side for a lower profile? I have a large projection screen and plan on placing two subs up front.
    Shawn P on Oct 29, 2017
    BEST ANSWER: Yes, you can lay the subwoofer on its side with no loss in performance.
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    In Stock This item should ship tomorrow (11/22/2017) if ordered within 19 hours 59 minutes