Monolith by Monoprice 15in THX Ultra Certified 1000-Watt Powered Subwoofer
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Monolith by Monoprice 15in THX Ultra Certified 1000-Watt Powered Subwoofer

Available: Out of Stock
€1,073.34 €1,192.60
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 16Hz, the Monolith THX Ultra 15" Subwoofer unleashes cinema level volume, with the ability to convey and articulate the subtle nuances of music.


 
THX Ultra Certified
Woofer
1000 Watt Amplifier

 
THX Ultra Certified
Woofer
1000 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.

15" Woofer: The Monolith™ 15" 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 three ports that can utilize foam plugs to run the subwoofer in a sealed mode, or tune it as you see fit.

1000 Watt Amplifier: The 1000W 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.



 



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



 



Anatomy of a Subwoofer



15-inch Subwoofer

Cabinet and Internal Bracing

HDF (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 Grille

The 15" model uses three 88.5mm port with inner and outer flares. Multiple ports are 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.






15-inch Driver



15-inch Subwoofer

Every 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 Suspension

FEA (Finite Element Analysis) modeling and Klippel laser based optimizations were used to design a cone that is capable of astounding >90mm 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 Venting

The 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 Surround

FEA (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 RUBBER-acrylonitrile-butadiene copolymer). This formulation was developed after months of modeling and prototyping to ensure the highest levels of excursion, without sacrificing linearity or distortion.


4. Motor Structure

The 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 Up



 
15-inch Subwoofer

 

The Monolith™ subwoofer amplifier has an extraordinarily high power output of 1000 watts RMS (nearly 2000 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 15-inch THX® Select certified subwoofer.






CEA-2010 SPL Measurements @ 2 meters



15-inch Subwoofer

15-inch Subwoofer
 


Ported (3 ports)


  SPL @ 2m Distortion
Hz Peak (dB) RMS (dB) THD% 2nd
Order
Harmonic
3rd
Order
Harmonic
12.5 91.0 88.0 12.0% 6.0% 9.7%
16 106.3 103.3 19.8% 16.3% 10.9%
20 112.6 109.6 12.5% 5.5% 10.6%
25 116.6 113.6 7.1% 4.2% 5.5%
31 119.5 116.5 5.4% 5.6% 2.2%
40 120.9 117.9 3.1% 2.5% 1.6%
50 120.6 117.6 2.1% 0.7% 2.0%
63 120.0 117.0 2.1% 0.4% 2.0%
80 118.7 115.7 1.5% 0.5% 1.3%
100 120.1 117.1 2.9% 0.7% 2.4%
125 120.2 117.2 1.3% 0.6% 0.8%
 


Ported (2 ports)


  SPL @ 2m Distortion
Hz Peak (dB) RMS (dB) THD% 2nd
Order
Harmonic
3rd
Order
Harmonic
12.5 100.4 97.4 16.4% 11.8% 10.5%
16 107.5 104.5 11.2% 6.5% 8.9%
20 111.6 108.6 11.3% 3.5% 10.0%
25 115.4 112.4 7.8% 5.9% 4.0%
31 118.2 115.2 5.5% 4.8% 1.9%
40 119.7 116.7 2.8% 1.9% 1.9%
50 119.8 116.8 2.1% 0.6% 2.0%
63 119.5 116.5 2.1% 0.4% 2.0%
80 119.4 116.4 1.5% 0.5% 1.3%
100 119.9 116.9 2.9% 0.7% 2.4%
125 120.1 117.1 1.3% 0.6% 0.8%
 


Sealed


  SPL @ 2m Distortion
Hz Peak (dB) RMS (dB) THD% 2nd
Order
Harmonic
3rd
Order
Harmonic
16 100.8 97.8 19.4% 8.6% 16.6%
20 106.9 103.9 19.1% 8.3% 16.1%
25 112.3 109.3 11.4% 8.7% 4.2%
31 115.8 112.8 7.3% 5.7% 3.7%
40 117.7 114.7 2.9% 1.4% 2.4%
50 118.4 115.4 2.2% 0.4% 2.0%
63 118.6 115.6 2.1% 1.9% 2.0%
80 118.9 115.9 2.0% 0.5% 1.8%
100 119.5 116.5 3.0% 0.6% 2.5%
125 120.0 117.0 1.1% 0.6% 0.6%
 





5 Year Warranty

Buy with Confidence

Monoprice™ not only stands behind this product with a 5 year replacement warranty, we offer a 30-day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund.



Quality at a Fair Price

Quality at a Fair Price

Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.



Hassle Free Packaging

Hassle Free Packaging

Monoprice 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 & Support

Service & Support

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:



Monoprice™, Monolith™, the Monolith logo, and all Monoprice logos are trademarks of Monoprice Inc.

THX® and the THX logo are trademarks of THX Ltd., registered in the U.S. and other countries. The THX Ultra logo is a trademark of THX Ltd.

Texas Instruments™ is a trademark of Texas Instruments.

DuPont™ and Nomex® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company or its affiliates.



Updated Jul 20, 2020


How long will it take for my order to arrive?

After the order has been placed, shipping takes about 3-4 business days.

How much do I have to pay for shipping?

Free shipping for orders from €20.

What are the returns policy?

You can return your items to us within 14 days without giving a reason. We expect the items to be in their original condition upon return.

How does the return work?

If you do not like an article, you can return it to us within 14 days of delivery. Please contact us at eusupport@monoprice.com to receive a return label. Please print the return label, stick it on the carefully sealed package and hand it over to your local post office. Please keep the document with the tracking number carefully.