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Monolith™ by Monoprice™12" THX® Certified Ultra 500‑Watt Powered SubwooferMassive Output. Low Distortion. THX® Certified.The Monolith™ THX® Certified Ultra 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. The Monolith subwoofer cabinets have been redesigned for a sleeker look, rounded edges, and an inset subwoofer for a better aesthetic appearance. THX® Certified Ultra12" Woofer500‑Watt Amplifier THX® Certified Ultra: 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 a single port that can utilize a foam plug to run the subwoofer in a sealed mode.500 Watt Amplifier: The 500W RMS amplifier is built around a Texas Instruments® 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. For almost 40 years, THX has set the standard for the audio and visual fidelity of entertainment experiences. THX Certification is a globally recognized assurance of uncompromising quality, consistency and performance. We blend art, technology, and the dynamics of real world listening and viewing environments to ensure products deliver the artist's true vision.THX CertificationUsing industry standards and a proprietary testing methodology, THX engineers evaluate and certify the audio and visual fidelity of consumer electronics to ensure they deliver the optimal entertainment experience. In cinemas, at home, and on‑the‑go, your entertainment comes alive with THX.Certification ProcessWhat We TestTHX engineers perform hundreds of audio and video performance and quality assurance tests before a product is confirmed to be THX® Certified.AUDIO: We analyze everything from output levels, frequency response, signal‑to‑noise, distortion and bass management to recreate high impact cinema sound and best‑in‑class audio fidelity.VIDEO: We test color accuracy, panel performance, and video processing, to confirm a display delivers accurate images and pristine video performance in every frame.Why Certification MattersThe THX® Certified benchmark offers consumers the assurance of superior audio or visual performance from consumer electronics.THX offers the industry's most rigorous testing processTHX guarantees high performance and premium build quality ANATOMY OF A SUBWOOFERCABINET AND INTERNAL BRACINGHDF (High Density Fiberboard), not MDF, was utilized resulting in a sonically inert cabinet. Internal bracing has been strategically placed to increase overall cabinet strength and limit unwanted panel vibrations that would cause discoloration and distortion. The strong cabinet and bracing combine to ensure you hear massive amounts of bass, not cabinet resonances.PORTS AND GRILLEThe 12" model uses a single 88.5mm port with inner and outer flares. A port is used to ensure high SPL capability at low frequency (fb=21Hz). The dual flares help reduce turbulence and asymmetrical distortions. Additional adjustments can be made by sealing the port with the supplied plug. The "floating" grille is made from non resonant MDF to provide rigidity, while the entire structure is offset from the cabinet to maximize air flow of the woofer and ports. 12‑INCH DRIVEREvery part of this driver has been developed from the ground up and customized to deliver high output, low distortion, and accurate bass. Our unique hybrid cone combines long fiber pulp and fiberglass, taking advantage of the pulp's superior stiffness with the additional rigidity and lightweight properties of fiberglass, to deliver a driver of massive durability and excursion. The result is a cone that achieves optimal motion at all frequencies it is asked to produce and beyond.1. Lower SuspensionFEA (Finite Element Analysis) modeling and Klippel laser based optimizations were used to design a cone that is capable of astounding >80mm peak‑to‑peak excursions. The lower and upper suspensions are designed together with the motor structure. The lower suspension is critical for maintaining very low levels of distortion at high excursions, which are required for high SPL at low frequencies.2. Spider and Cone VentingThe spider is made from multiple layers of NOMEX® with integrated tinsel leads hand stitched in place for low mass, yet high strength and durability. The purpose of these vents are twofold ‑‑ first, they allow convective air flow to cool the voice coil and, second, they reduce asymmetrical compliance due to air compression under the cone/spider, which would appear as unwanted distortions.3. Woofer SurroundFEA (Finite Element Analysis) modeling and Klippel laser based optimization were utilized to create this durable, high profile surround that's made from a unique formulation of NBR (nitrile butadiene rubber). This formulation was developed after months of modeling and prototyping to ensure the highest levels of excursion, without sacrificing linearity or distortion.4. Motor StructureThe motor is made of CNC milled low carbon steel in the modified undercut "T" pole assembly to focus the magnetic flux. Dual aluminum shorting rings are used to cancel eddy currents, further stabilizing the magnetic flux and significantly lowering distortion. The precision wound, high temperature, all aluminum bobbin (which has a lower thermal compression than copper) enable the voice coil to remain cool. The motor and suspension design is extremely critical for maintaining control of the driver's displacement over a very wide range of input signals, allowing the subwoofer to reach maximum performance and output levels, while keeping distortion to a minimum. ALL AMP'D UPThe Monolith™ subwoofer amplifier has an extraordinarily high power output of 500 watts RMS (900 watts peak), which can deliver massive amounts of power when needed. Each Class D amplifier is built around a Texas Instruments® 48‑bit data path (with 28‑bit filter coefficients) DSP engine, allowing virtually unlimited design flexibility with the assurance of no signal degradation. Each amplifier's transfer function, power output limiting, and thermal protection are monitored to the millisecond and are customized for each individual woofer and cabinet air volume combination. This state‑of‑the‑art Class D amplifier technology ensures maximum headroom capability, excellent transient response, high output, and very low distortion when driving the Monolith 12" THX® Certified Ultra Subwoofer. Ported (2 ports)SPL @ 2mDistortionHzPeak (dB)Peak (dB)THD%2nd Order Harmonic3rd Order Harmonic1699.796.78.10%3.90%6.50%20108.3105.39.50%3.40%8.00%25112.3109.35.70%1.30%5.20%31113.6110.64.30%2.60%2.90%40114.2111.24.00%2.40%3.10%50114.6111.62.70%1.50%2.20%63115.0112.02.60%1.10%2.30%80115.4112.41.60%0.80%1.00%100115.9112.91.20%0.70%0.80%125116.3113.31.20%0.70%0.60% Ported (1 port)SPL @ 2mDistortionHzPeak (dB)Peak (dB)THD%2nd Order Harmonic3rd Order Harmonic16101.898.89.20%1.30%8.50%20106.3103.311.70%5.50%8.70%25108.5105.58.00%4.60%4.50%31110.8107.84.70%3.20%2.40%40111.5108.53.60%2.60%2.10%50111.9108.92.50%0.80%2.10%63112.6109.62.30%1.30%1.20%80113.6110.63.30%1.70%1.40%100114.3111.31.90%1.10%1.50%125115.0112.01.30%0.80%0.90% SealedSPL @ 2mDistortionHzPeak (dB)Peak (dB)THD%2nd Order Harmonic3rd Order Harmonic1695.092.015.30%2.40%13.50%20100.397.317.10%3.10%15.40%25105.4102.412.70%4.30%9.90%31108.1105.13.50%2.00%2.30%40109.9106.92.90%1.40%2.10%50110.9107.92.20%0.70%1.20%63112.1109.12.10%0.90%0.90%80113.1110.12.60%1.10%1.20%100113.9110.92.10%1.10%1.70%125114.8111.81.40%1.00%0.80%.gte-ctr .row{margin:0;}5 Year Replacement WarrantyMonoprice™ not only stands behind this product with a 5 year replacement warranty, we offer a 45 day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund.45 Day Money Back GuaranteeMonoprice stands behind every product we sell with a 45 day money back guarantee! If the product you purchase does not satisfy your needs, send it back for a full refund.Quality at a Fair PriceMonoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.Hassle Free PackagingMonoprice exists to bring simplicity, fairness, and confidence to technology choices. This product features recyclable packaging that is simple to open, cost effective, with minimal waste, and fully protective as it travels to you.Service and SupportYou'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: Manual (Sep 28, 2022)Monoprice™, Monolith™, the Monolith logo, and all Monoprice logos are trademarks of Monoprice Inc. THX® and the THX logo are the property of THX Ltd., registered in the U.S. and other countries. Texas Instruments® and TI® are registered trademarks of Texas Instruments Incorporated. DuPont™ and Nomex® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company or its affiliates. Updated Mar 23, 2022 Warning: This product can expose you to Phthalates, which is known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov
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