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forum threadvid1900 posted Jul 24, 2026 7:22 PM

Dual 15" 2000w Subwoofer $2700 Monolith THX

$2,700

$3,000

10% off
Monoprice
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The big boy is back on sale!

Monolith by Monoprice M-215 Dual 15in THX Certified Ultra 2000-Watt Powered Subwoofer

Use code = MOVE50 to save $300

5 Year Warranty (Yes, they ship you replacement parts; no more sending the entire sub back like when this sub first came out)

XLR and RCA inputs
-
THX® Certified Ultra: Add a Tower of Bass to your home theater system! This 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 16Hz, the Monolith THX® Certified Ultra Dual 15" Subwoofer unleashes cinema level volume with the ability to convey and articulate the subtle nuances of music.

Dual 15" Woofers: The Monolith™ 15" driver was developed from the ground up, with a design focus on achieving output, accuracy, dynamics, and linearity, while minimizing distortion. It is enclosed in an HDF cabinet with massive internal bracing. The cabinet features a large, slot‑shaped port at the bottom, which can closed using the included foam plug to run the subwoofer in full sealed mode.

2000‑Watt Amplifier: The 2000‑watt (RMS)/3600‑watt (peak) amplifier is built around a Texas Instruments™ 48‑bit data path (with 28‑bit filter coefficients) 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.

https://www.monoprice.com/product?p_id=38543
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Deal Details
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The big boy is back on sale!

Monolith by Monoprice M-215 Dual 15in THX Certified Ultra 2000-Watt Powered Subwoofer

Use code = MOVE50 to save $300

5 Year Warranty (Yes, they ship you replacement parts; no more sending the entire sub back like when this sub first came out)

XLR and RCA inputs
-
THX® Certified Ultra: Add a Tower of Bass to your home theater system! This 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 16Hz, the Monolith THX® Certified Ultra Dual 15" Subwoofer unleashes cinema level volume with the ability to convey and articulate the subtle nuances of music.

Dual 15" Woofers: The Monolith™ 15" driver was developed from the ground up, with a design focus on achieving output, accuracy, dynamics, and linearity, while minimizing distortion. It is enclosed in an HDF cabinet with massive internal bracing. The cabinet features a large, slot‑shaped port at the bottom, which can closed using the included foam plug to run the subwoofer in full sealed mode.

2000‑Watt Amplifier: The 2000‑watt (RMS)/3600‑watt (peak) amplifier is built around a Texas Instruments™ 48‑bit data path (with 28‑bit filter coefficients) 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.

https://www.monoprice.com/product?p_id=38543

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Model: Monolith by Monoprice M-215 Dual 15in THX Certified Ultra 2000-Watt Powered Subwoofer

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11 Comments

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Original Poster
Pro
Jul 24, 2026 7:32 PM
3.2K Comments
Joined Sep 2016
vid1900
Original Poster
Pro
Jul 24, 2026 7:32 PM
3.2K Comments
No sub, by any brand, can come anywhere near the depth and output of this sub for the price.

216 pounds of subwoofer!
1
Jul 24, 2026 8:08 PM
147 Comments
Joined Nov 2017
WalterH2943Jul 24, 2026 8:08 PM
147 Comments
First of all, this is an outstanding sub! Second, when I bought it 3/15/2023 my price delivered was $1630.50 with tax AND FREE SHIPPING. I would be all over this deal if I could get free shipping again. I'm afraid those days are gone. $2000 for this sub 3 years later including shipping and tax is still prolly a great deal!
Jul 24, 2026 8:23 PM
147 Comments
Joined Nov 2017
WalterH2943Jul 24, 2026 8:23 PM
147 Comments
Maximum discount is $300 with code MOVE50 on this item.
Jul 24, 2026 8:25 PM
1.1K Comments
Joined Feb 2024
AronManJul 24, 2026 8:25 PM
1.1K Comments
bummer that the move50 coupon no longer takes 50% off. It did in the early days of it being posted. It is now MAX $300 discount..
Original Poster
Pro
Jul 24, 2026 8:56 PM
3.2K Comments
Joined Sep 2016
vid1900
Original Poster
Pro
Jul 24, 2026 8:56 PM
3.2K Comments
Quote from AronMan :
bummer that the move50 coupon no longer takes 50% off. It did in the early days of it being posted. It is now MAX $300 discount..
Hmmmm....you are right.

Last time the coupon said "max -$300", but it did the 50% off during checkout no problem.

Sigh.
1
Original Poster
Pro
Jul 24, 2026 9:11 PM
3.2K Comments
Joined Sep 2016
vid1900
Original Poster
Pro
Jul 24, 2026 9:11 PM
3.2K Comments
Quote from WalterH2943 :
First of all, this is an outstanding sub! Second, when I bought it 3/15/2023 my price delivered was $1630.50 with tax AND FREE SHIPPING. I would be all over this deal if I could get free shipping again. I'm afraid those days are gone. $2000 for this sub 3 years later including shipping and tax is still prolly a great deal!
With $5 gas and all the tariffs, I also fear that the days of cheap monster subs are far behind us.

You used to be able to get this sub as an Open Box for $960 and free shipping.

I don't think you could buy the drivers, plywood and a 2000w amp for that, even if you were building it yourself.
Jul 25, 2026 9:08 PM
1.1K Comments
Joined Feb 2024
AronManJul 25, 2026 9:08 PM
1.1K Comments
Quote from vid1900 :
With $5 gas and all the tariffs, I also fear that the days of cheap monster subs are far behind us.

You used to be able to get this sub as an Open Box for $960 and free shipping.

I don't think you could buy the drivers, plywood and a 2000w amp for that, even if you were building it yourself.
you could NEVER get this sub for $960 open box and free shipping...
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Jul 25, 2026 9:37 PM
13K Comments
Joined Jul 2010
supermanrobJul 25, 2026 9:37 PM
13K Comments
Quote from AronMan :
bummer that the move50 coupon no longer takes 50% off. It did in the early days of it being posted. It is now MAX $300 discount..
Yes that was an error, some even reported getting their order cancelled.

Crucial info was left off this post which is the Dimensions:
L27.6" x W20.0" x H42.3"!

Imo at this price, you're better off going with two smaller subs, with very likely a lot more cash in your pocket to boot!
1
Original Poster
Pro
Jul 25, 2026 10:05 PM
3.2K Comments
Joined Sep 2016
vid1900
Original Poster
Pro
Jul 25, 2026 10:05 PM
3.2K Comments
Quote from AronMan :
you could NEVER get this sub for $960 open box and free shipping...
1
Original Poster
Pro
Jul 25, 2026 10:13 PM
3.2K Comments
Joined Sep 2016
vid1900
Original Poster
Pro
Jul 25, 2026 10:13 PM
3.2K Comments
Quote from supermanrob :

Yes that was an error, some even reported getting their order cancelled.

Crucial info was left off this post which is the Dimensions:
L27.6" x W20.0" x H42.3"!

Imo at this price, you're better off going with two smaller subs, with very likely a lot more cash in your pocket to boot!
An error that ran for 3 weeks??

Who reported that they got their order cancelled?

What smaller subs can do 116db @ 16hz ?

Or 100 db @ 12hz ?

Like they always say, there is no replacement for displacement.
1
Jul 26, 2026 2:48 AM
13K Comments
Joined Jul 2010
supermanrobJul 26, 2026 2:48 AM
13K Comments
Quote from vid1900 :
An error that ran for 3 weeks??Who reported that they got their order cancelled? What smaller subs can do 116db @ 16hz ?Or 100 db @ 12hz ?Like they always say, there is no replacement for displacement.
Unknown how long it ran but the only one who admittedly ordered got cancelled.
That should not be a surprise.

No one mentioned measurements.

Are you claiming everyone gets those measurements and it "sounds" exactly the same regardless of where you place the sub, where you're seated and how it calibrated/integrated?
Last edited by supermanrob July 25, 2026 at 08:23 PM.

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