Monolith 10" THX Select Certified 500 Watt Powered Subwoofer

Monolith 10" THX Select Certified 500 Watt Powered Subwoofer

Product # 24456

$499.99

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Monolith 10" THX Select Certified 500 Watt Powered 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 Select Certified

Woofer

500 Watt Amplifier

THX Select 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 Select products are for medium sized rooms, up to 2,000 cubic feet in size, with a 10-12 foot viewing distance from the screen.

10" Woofer: The Monolith 10" driver was developed from the ground up, with a design focus on of 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 (900 watts peak power) 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® Certified Select products are for medium sized rooms, up to 2,000 cubic feet in size, with a 10-12 foot viewing distance from the screen.*

* Previously known as Select2

Anatomy of a 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 10" 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.

10-inch Driver

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 >78mm 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

The 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 10-inch THX Select certified subwoofer.

CEA-2010 SPL Measurements @ 2 meters

Ported

	SPL @ 2m		Distortion
Hz	Peak (dB)	RMS (dB)	THD%	2nd Order Harmonic	3rd Order Harmonic
16	93.9	90.9	18.7%	16.8%	6.5%
20	104.8	101.8	10.1%	9.3%	2.6%
25	108.5	105.5	3.2%	0.4%	2.5%
31	109.3	106.3	4.4%	2.9%	3.2%
40	109.7	106.7	5.4%	4.9%	1.9%
50	110.1	107.1	4.7%	4.4%	1.6%
63	110.6	107.6	6.3%	5.2%	3.4%
80	110.9	107.9	7.8%	6.8%	3.6%
100	111.2	108.2	9.5%	9.0%	2.4%
125	111.5	108.5	5.6%	4.8%	2.6%

Sealed

	SPL @ 2m		Distortion
Hz	Peak (dB)	RMS (dB)	THD%	2nd Order Harmonic	3rd Order Harmonic
16	91.4	88.4	14.2%	4.2%	12.2%
20	97.5	94.5	17.3%	2.7%	15.2%
25	102.6	99.6	15.9%	9.8%	9.8%
31	106.5	103.5	11.4%	8.6%	7.2%
40	107.8	104.8	7.7%	6.0%	4.1%
50	109.1	106.1	6.9%	5.8%	3.4%
63	110.0	107.0	8.1%	6.5%	4.6%
80	110.8	107.8	9.0%	8.5%	2.6%
100	111.7	108.7	7.1%	6.4%	2.7%
125	112.0	109.0	4.8%	4.5%	1.3%

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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:

User's Manual (Nov 6, 2017)

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

Full Specs

Model	24456
Woofer	10" 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, undercut T-pole focused field
Magnet	Ceramic Y35, 2 pcs total 125 oz.
Xmax	18mm (one-way)
Xmech	78mm (peak-to-peak)
Enclosure	Sealed or vented HDF cabinet with horizontal and vertical bracing
Finish	Black Ash
Amplifier	Class D 500W_rms/ 900W Peak Power
Frequency Response (-6dB)	Sealed	Vented
Extended EQ	28-200Hz	18-200Hz
THX EQ	31-200Hz	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)	18.9" x 15" x 19.7" (480 x 380 x 500mm)
Net Weight	72.5 lbs. (32.9 kg)
Gross Weight	93.9 lbs. (42.6 kg)

Questions That Need Answers | My Posts

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Browse 10 questions Browse 10 questions and 14 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 10" THX Select Certified 500 Watt Powered Subwoofer

Monolith 12" THX Ultra Certified 500 Watt Powered Subwoofer

Monolith 15" THX Ultra Certified 1000 Watt Powered Subwoofer

BEST ANSWER: We will be adding CEA-2010 @2M burst and RMS measurements by frequency in the near future.

Reply
Inaccurate
Hobie S Staff on Sep 5, 2017

For long term, is a pair of tens as good as the twelves at normal listening levels? Main application music. And what is the trade off in sealed mode vs using an actual high quality sealed subwoofer? And how accurate musically is vented mode vs sealed?

A shopper on Sep 21, 2017

BEST ANSWER: All the Monolith subwoofers are very musical, and I think you will find them to be tight, even in ported mode. The main trade off in sealed vs ported is output down low.

Reply
Inaccurate
Hobie S Staff on Dec 12, 2017

Under the "Full Specs" section the the frequency response is listed as 31-200Hz sealed with THX EQ, however in the manual it is stated as 20-200Hz for the same configuration. Which is correct?

New User U on Nov 18, 2017

BEST ANSWER: We have posted the CEA-2010 measurements for all modes.

Reply
Inaccurate
Hobie S Staff on Feb 13, 2018

Is the 10" driver cast or stamped steel?

A shopper on Oct 31, 2017

BEST ANSWER: All the Monolith subwoofer drivers are cast aluminum not stamped steel.

Reply
Inaccurate
Hobie S Staff on Oct 31, 2017

is there financing?

A shopper on Dec 2, 2017

BEST ANSWER: Not by Monoprice.

Reply
Inaccurate
New User U on Jan 3, 2018

is there a dedicated on and off switch ?

New User U on Jan 1, 2018

BEST ANSWER: Yes. There’s a switch that turns on power to the unit as well as a standby on/off toggle. This sets the subwoofer to either turn off after 30 minutes, or to remain on until you turn off the power switch.

Reply
Inaccurate
Michael A D on Jan 2, 2018
Purchased on Dec 9, 2017

Reply
Inaccurate
Michael A D on Jan 2, 2018
Purchased on Dec 9, 2017

Yes, there is a power switch.

Reply
Inaccurate
reeann d on Jan 1, 2018
Purchased on Nov 19, 2017

Yes, there is.

Reply
Inaccurate
Hobie S Staff on Jan 2, 2018

Vote for the best answer above!

For a 20x20 room, would two 10” or one 12” be better?

A shopper on Feb 6, 2018

BEST ANSWER: As a general rule for subwoofer coverage, its better to have 2 subs providing coverage than just one. Two subs will help provide more even coverage at the listening position and provide a wider listening position. Also, with two subs, any modes or standing waves can be dealt with a lot easier with 2 subs than just one. Subs are generally non-directional: your ear cannot tell where sound below 40 hz is coming from. Placing 2 gives you better chances of great sound.

Reply
Inaccurate
T L on Feb 6, 2018
Purchased on Nov 16, 2017

Reply
Inaccurate
T L on Feb 6, 2018
Purchased on Nov 16, 2017

Two is generally better than one if you have subwoofer placement flexibility. You will get more even bass coverage in your room, and you will be able to deal with any nulls or room modes more efficiently.

Reply
Inaccurate
Hobie S Staff on Feb 6, 2018

Vote for the best answer above!

How to daisy chain a pair, or 4?

A shopper on Sep 15, 2017

BEST ANSWER: Y-splitter is the answer

Reply
Inaccurate
New User U on Jan 20, 2018

BEST ANSWER: Y-splitter is the answer

Reply
Inaccurate
New User U on Jan 20, 2018

You would need to daisy chain by utilizing the XLR pass through for 2 or 4 subwoofers.

Reply
Inaccurate
Hobie S Staff on Sep 15, 2017

Vote for the best answer above!

Would it be better to get to 10" for a room that is 25 x 15 ( about 3000 cubic ft) or one 12"?

A shopper on Sep 10, 2017

BEST ANSWER: I would recommend a single 12" subwoofer over the 10" for that size room. You could also look at utilizing 2 10" subwoofers as well.

Reply(1)
Inaccurate
Hobie S Staff on Sep 11, 2017

BEST ANSWER: I would recommend a single 12" subwoofer over the 10" for that size room. You could also look at utilizing 2 10" subwoofers as well.

Reply(1)
Inaccurate
Hobie S Staff on Sep 11, 2017

I would go with two of the 10 inch twos always better than one. I own 1 10 in monolith I'm getting one more I can't imagine what the two subs will do together the one by itself shakes my house!

Reply
Inaccurate
Frank M on Mar 8, 2018
Purchased on Mar 2, 2018

Vote for the best answer above!

Are the in-house CEA-2010 numbers listed in THX mode or Extended mode?

A shopper on Mar 4, 2018

Monolith 10" THX Select Certified 500 Watt Powered Subwoofer

Monolith 15" THX Ultra Certified 1000 Watt Powered Subwoofer

Monolith 12" THX Ultra Certified 500 Watt Powered Subwoofer

Review More Purchases | My Posts

5.0 / 5.0

4 Reviews

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1 Stars

Awesome subwoofers

I have two monolith 10inch subwoofers. Using balanced inputs these are some of the best subs I have heard/felt. They are day and night difference over another brand I have. The bass is clean and accurate. Musical basslines rollout right. Highly recommend these. Alway go dual if you can.

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December 16, 2017

brian a

Purchased
4 months ago

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Nice, Clean Punch

I'll preface by saying I'm no audiophile, but a very discerning "pro-sumer." I have an ear for quality sound, and won't settle for thin or inaccurate sound. This sub is phenomenal! Listening to classical and instrumental music, the performance was clean and uniform (Cellos sounded particularly accurate- a feat I find even expensive subs struggle with.) Movie scores sounded majestic, and explosions from games or movies literally shook the wall! (When the wife allowed it to be that loud...) It punches deep when needed (explosions and such) and preforms clean and accurate (music.) Clean is the best word I can describe it with: across all frequencies the bass was very smooth. You would definitely need to experiment to your liking with the settings, but you will not be disappointed!
I will also mention that Monoprice sent me this sub as a Christmas gift! I sent them a letter (poem actually) and they responded in kind with their own poem! The saved Christmas after my former sub gave out. Still, at this price point, this sub is still a steal of deal! Thank you Monoprice for a great product and great gift!

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January 6, 2018

Jonthan B

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Monolith Power!

I purchased the monolith 10. I was using two Polk 505’s. I wondered before purchasing how much better could one 10 do against two 300 watt 12’s. Wow! The monolith 10 is a beast! Plays cleaner with more depth. The sound quality is outstanding. The power is all there. I will get another one just to improve the room having equal sweet spots. My family thinks I am crazy become the monolith has out preformed two subs. Buy it! My friend could not believe the sound quality. Outstanding purchase.

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January 14, 2018

kevin h

Purchased
3 months ago

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It looks like a tank!! Everyone that comes over first thing they say is I want to hear that thanks for a great sub

Wow this monolith is the best sub I've ever had it literally shakes my whole house. i had two psb subs and this one still has more Bass then both. great sub i would recommend it I'm definitely getting one more

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March 8, 2018

Frank M

Purchased
1 month ago

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