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expired Posted by gsnaps • Sep 14, 2023
expired Posted by gsnaps • Sep 14, 2023

15" 1000W Monolith M-15 V2 THX Certified Ultra Subwoofer (Open Box)

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$600

$1,000

40% off
Monoprice
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Deal Details
Monoprice has 15" 1000W Monoprice Monolith M-15 V2 THX Certified Ultra Subwoofer (Open Box, 42851) on sale for $599.99. Shipping will vary by location.

Thanks to community member gsnaps for finding this deal.

About this item:
  • 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.
  • 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.
  • 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 6 years. The amplifier has vast reserves of power for highly
  • 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.
  • All Amp'd Up: The Monolith subwoofer amplifier has an extraordinarily high power output of 1000 watts RMS (1800 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.

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
  • About this product:
    • Open Box merchandise are products that have been purchased and delivered to other customers, and then returned to Monoprice. Due to the varying quality of products returned, we make every attempt to supply the original accessories for Open Box products. However, Monoprice only guarantees that you will receive the product itself, accessories may or may not be included. Bear in mind that your open box product may not contain cables, adaptors, manuals, CDs, drivers, etc. Additionally, the product may exhibit cosmetic imperfections as a result of its having been previously opened. This Open Box product comes with a 90-day Limited Product Warranty.
  • About this store:

Original Post

Written by gsnaps
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Monoprice has 15" 1000W Monoprice Monolith M-15 V2 THX Certified Ultra Subwoofer (Open Box, 42851) on sale for $599.99. Shipping will vary by location.

Thanks to community member gsnaps for finding this deal.

About this item:
  • 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.
  • 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.
  • 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 6 years. The amplifier has vast reserves of power for highly
  • 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.
  • All Amp'd Up: The Monolith subwoofer amplifier has an extraordinarily high power output of 1000 watts RMS (1800 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.

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
  • About this product:
    • Open Box merchandise are products that have been purchased and delivered to other customers, and then returned to Monoprice. Due to the varying quality of products returned, we make every attempt to supply the original accessories for Open Box products. However, Monoprice only guarantees that you will receive the product itself, accessories may or may not be included. Bear in mind that your open box product may not contain cables, adaptors, manuals, CDs, drivers, etc. Additionally, the product may exhibit cosmetic imperfections as a result of its having been previously opened. This Open Box product comes with a 90-day Limited Product Warranty.
  • About this store:

Original Post

Written by gsnaps

Community Voting

Deal Score
+23
Good Deal
Visit Monoprice

Price Intelligence

Model: Monolith by Monoprice M-15 V2 15in THX Certified Ultra 1000-Watt Subwoofer Amplifier (Open Box)

Deal History 

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Sort: Lowest to Highest | Last Updated 5/28/2025, 10:15 PM
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Monoprice.com$1,299.99
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Top Comments

179.99 for shipping makes this a bit harder to swallow
This could probably liquefy your insides in a 10'x14' room.
and only a 90 day warranty.

"This Open Box product comes with a 90-day Limited Product Warranty."

60 Comments

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Sep 14, 2023
466 Posts
Joined Dec 2007
Sep 14, 2023
Laughton
Sep 14, 2023
466 Posts
Would it be a bad idea to mix this with SVS PB3000?
Sep 14, 2023
1,623 Posts
Joined Jul 2012
Sep 14, 2023
c_nitty
Sep 14, 2023
1,623 Posts
Does this one perform well in a 14 x 10 room?
Sep 14, 2023
99 Posts
Joined Dec 2018
Sep 14, 2023
TJake
Sep 14, 2023
99 Posts
Quote from c_nitty :
Does this one perform well in a 14 x 10 room?
This could probably liquefy your insides in a 10'x14' room.
Pro
Sep 14, 2023
2,781 Posts
Joined Aug 2005
Sep 14, 2023
leecm
Pro
Sep 14, 2023
2,781 Posts
These open boxes from monoprice scare me because they could have damage, and dealing with returns could be a huge hassle for something so large and heavy. Great price though if you get one in like-new condition
Pro
Sep 14, 2023
9,329 Posts
Joined Jul 2005
Sep 14, 2023
fourml8r
Pro
Sep 14, 2023
9,329 Posts

Our community has rated this post as helpful. If you agree, why not thank fourml8r

Quote from leecm :
These open boxes from monoprice scare me because they could have damage, and dealing with returns could be a huge hassle for something so large and heavy. Great price though if you get one in like-new condition
and only a 90 day warranty.

"This Open Box product comes with a 90-day Limited Product Warranty."
2
1
Sep 14, 2023
1,911 Posts
Joined Nov 2011
Sep 14, 2023
inspir3d
Sep 14, 2023
1,911 Posts
Quote from leecm :
These open boxes from monoprice scare me because they could have damage, and dealing with returns could be a huge hassle for something so large and heavy. Great price though if you get one in like-new condition
they come with a warranty....youll be fine Wink
1
Sep 14, 2023
409 Posts
Joined Oct 2011
Sep 14, 2023
edward_ccm
Sep 14, 2023
409 Posts

Our community has rated this post as helpful. If you agree, why not thank edward_ccm

179.99 for shipping makes this a bit harder to swallow
3

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Sep 14, 2023
1,373 Posts
Joined Apr 2017
Sep 14, 2023
Undefined.null
Sep 14, 2023
1,373 Posts

Our community has rated this post as helpful. If you agree, why not thank Undefined.null

$150 shipping for me.
1
Original Poster
Sep 14, 2023
17 Posts
Joined Sep 2011
Sep 14, 2023
gsnaps
Original Poster
Sep 14, 2023
17 Posts
Quote from leecm :
These open boxes from monoprice scare me because they could have damage, and dealing with returns could be a huge hassle for something so large and heavy. Great price though if you get one in like-new condition
I've read that Monoprice started sending out replacement amps instead of having people send back the whole unit.
Sep 14, 2023
97 Posts
Joined May 2012
Sep 14, 2023
AveryL
Sep 14, 2023
97 Posts
148 in shipping kinda kills it for me.
1
Sep 14, 2023
1 Posts
Joined Jun 2023
Sep 14, 2023
Johnmma
Sep 14, 2023
1 Posts
Quote from Laughton :
Would it be a bad idea to mix this with SVS PB3000?
Subs you can always mix. Speakers it's best to keep the same brand and style. The frequency of subs are so low that it's hard to even tell what direction there coming from so that why it's Ike to mix different brands and sizes of subs
3
Sep 14, 2023
702 Posts
Joined Feb 2016
Sep 14, 2023
FlashPilot
Sep 14, 2023
702 Posts
$206 shipping kills the deal for me. 3-5 business days is their lowest rate. Im surprised they dont have other options for less that take longer, as do most large retailers.
Original Poster
Sep 14, 2023
17 Posts
Joined Sep 2011
Sep 14, 2023
gsnaps
Original Poster
Sep 14, 2023
17 Posts
Mine came out to $220 for shipping and still can't touch this quality of subwoofer for twice the price.
1
Pro
Sep 14, 2023
2,781 Posts
Joined Aug 2005
Sep 14, 2023
leecm
Pro
Sep 14, 2023
2,781 Posts
Quote from inspir3d :
they come with a warranty....youll be fine Wink
If you're ok with having exterior damage. Warranty doesn't cover exterior damage for open box subs
1

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Pro
Sep 14, 2023
11,178 Posts
Joined Jul 2010
Sep 14, 2023
supermanrob
Pro
Sep 14, 2023
11,178 Posts
Quote from Laughton :
Would it be a bad idea to mix this with SVS PB3000?
Having experience with both I would not recommend mixing them.

At this price you would be better off buying two of these and sell the PB3000 for the same price if not more(hold their value well).

Hope you are lucky and get two with no issues, Monoprice's CS isn't a strong suit.
Last edited by supermanrob September 14, 2023 at 12:07 PM.
1

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