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LavenderGoat459 14.8K Views
Jul 15, 2026 2:15 PM

12" Monoprice SW-12 400W RMS Powered Subwoofer Speaker (Black)

$180

$365

50% off
+ Free S&Hat Amazon
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Deal Details
Amazon has 12" Monoprice SW-12 400W RMS Powered Subwoofer Speaker (Black) on sale for $179.99. Shipping is free.

Alternatively, Monoprice also has 12" Monoprice SW-12 400W RMS Powered Subwoofer Speaker (Black) on sale for $179.99. Shipping is free.

Thanks to Deal Hunter LavenderGoat459 for finding this deal

Note, product must be sold/shipped by Amazon or Monoprice respectively.

Editor's Notes

Written by Discombobulated | Staff
  • Price Research
    • At the time of research, this product is $185 lower (50.69% savings); normally priced for $364.99
  • About the Deal
    • This Monoprice SW-12 powered subwoofer adds deeper bass w/ more dramatic impact; front firing 12" woofer, 400W RMS amplifier (600W peak/3 ~150Hz frequency response) w/ down-firing port w/ variable phase control and low pass filter
    • Product is eligible for refund/replacement within 30-days of purchase
    • Offer valid while promotional price/supplies last
  • Additional Details

Original Post

Written by LavenderGoat459
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 12" Monoprice SW-12 400W RMS Powered Subwoofer Speaker (Black) on sale for $179.99. Shipping is free.

Alternatively, Monoprice also has 12" Monoprice SW-12 400W RMS Powered Subwoofer Speaker (Black) on sale for $179.99. Shipping is free.

Thanks to Deal Hunter LavenderGoat459 for finding this deal

Note, product must be sold/shipped by Amazon or Monoprice respectively.

Editor's Notes

Written by Discombobulated | Staff
  • Price Research
    • At the time of research, this product is $185 lower (50.69% savings); normally priced for $364.99
  • About the Deal
    • This Monoprice SW-12 powered subwoofer adds deeper bass w/ more dramatic impact; front firing 12" woofer, 400W RMS amplifier (600W peak/3 ~150Hz frequency response) w/ down-firing port w/ variable phase control and low pass filter
    • Product is eligible for refund/replacement within 30-days of purchase
    • Offer valid while promotional price/supplies last
  • Additional Details

Original Post

Written by LavenderGoat459

Community Voting

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Top Comments

AquaVolcano980
385Comments
38Reputation
The Dayton only has 200 watts vs. 400 for the Monoprice, the Dayton uses spring clips instead of binding posts for speaker level connections, and is also made in China. The reviews on Monoprice don't mention a single amp failure, so I'm not seeing the benefit of the Dayton.
Go to Comment
CalmMitten9192
1.8KComments
102Reputation
Get the Dayton CS1200 (improved legendary Sub-1200) for a little more and you have something that both sounds good and where you have a much higher chance of finding a replacement plate amp if it ever fails than with this disposable China sub. Nothing against mono as a company and I have some of their THX speakers which are awesome.
Go to Comment

Community Reviews

The Monoprice SW-12 is a budget 12 inch powered sub that can deliver strong room shaking bass for basic 2.1 or 5.1 setups, especially at around $180. It is described as a solid price to performance pick, with enough output to free budget for better speakers. The main concern is reliability, with repeated reports of amp failures, warranty hassles, and some units arriving defective or used. For a tight budget, it offers a lot of bass, but long term support and durability are the tradeoffs.

  • The price-to-performance can be strong when the unit performs acceptably for the money.

    ilovetofusupermanrob

  • The subwoofer can work well for basic 2.1 or even 5.1 home theater setups.

    k4ylr

  • The Monoprice plate amp may be replaceable separately now, which can reduce repair friction.

    SmartFriction5417

  • The subwoofer can be a worthwhile budget trade-off when it frees money for better speakers.

    k4ylr

  • The amplifier can fail within months, and support may not offer meaningful help.

    m6284505m6284505

  • Support may refuse to sell a replacement plate amp separately, which can force replacing the whole sub.

    m6284505CalmMitten9192

  • Quality control and review moderation concerns can affect confidence, including reports of used arrivals and removed low ratings.

    LavenderString100cpgeek

  • The subwoofer can power off too quickly in auto mode when the receiver signal is inconsistent.

    ilovetofu

Common Questions (5)

AI-generated summary based on comments from the community. Updated ago

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35 Comments

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Jul 15, 2026 2:52 PM
1.8K Comments
Joined Oct 2020
CalmMitten9192Jul 15, 2026 2:52 PM
1.8K Comments

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

Get the Dayton CS1200 (improved legendary Sub-1200) for a little more and you have something that both sounds good and where you have a much higher chance of finding a replacement plate amp if it ever fails than with this disposable China sub. Nothing against mono as a company and I have some of their THX speakers which are awesome.
3
2
Jul 15, 2026 3:08 PM
13.3K Comments
Joined Jul 2010

This comment has been rated as unhelpful by Slickdeals users.

Jul 15, 2026 3:14 PM
84 Comments
Joined Mar 2019
MichaelM25Jul 15, 2026 3:14 PM
84 Comments
Same price Amazon , 3 star review average, skip
Jul 15, 2026 3:17 PM
385 Comments
Joined Sep 2022
AquaVolcano980Jul 15, 2026 3:17 PM
385 Comments

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

The Dayton only has 200 watts vs. 400 for the Monoprice, the Dayton uses spring clips instead of binding posts for speaker level connections, and is also made in China. The reviews on Monoprice don't mention a single amp failure, so I'm not seeing the benefit of the Dayton.
3
1
Jul 15, 2026 4:39 PM
13.3K Comments
Joined Jul 2010
supermanrobJul 15, 2026 4:39 PM
13.3K Comments
Quote from AquaVolcano980 View quoted comment :
The Dayton only has 200 watts vs. 400 for the Monoprice, the Dayton uses spring clips instead of binding posts for speaker level connections, and is also made in China. The reviews on Monoprice don't mention a single amp failure, so I'm not seeing the benefit of the Dayton.
Good points.
IF the Dayton was a better choice "for a little more", that's around $60(on sale).

"For a little more" the RSL 10e might be the better choice.

If I recall, the RSL 10e is made in China also.
5
Jul 15, 2026 4:44 PM
70 Comments
Joined Mar 2024
FairBorder6027Jul 15, 2026 4:44 PM
70 Comments
Quote from supermanrob View quoted comment :
Wow great reviews saying great room shaking sound, Butterworth approved all for $180! Now that sounds like a great price-to-performance winner!!! You could almost get two for the price of the popular RSL 10e!!! People often say two is better than one & this is bigger & 12" not a 10" like the 10e!!!
So two of these beat a single rsl 10e? Hmmm
5
Jul 15, 2026 5:27 PM
200 Comments
Joined Feb 2009
carbondealJul 15, 2026 5:27 PM
200 Comments
For subs honestly what I found for theater at least you need a 15". Plus low end extension cheap subs like this just won't do. Max db output imo don't matter as much as low range and box tuning for 17Hz.
4

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Jul 15, 2026 7:04 PM
13.3K Comments
Joined Jul 2010
supermanrobJul 15, 2026 7:04 PM
13.3K Comments
Quote from FairBorder6027 View quoted comment :
So two of these beat a single rsl 10e? Hmmm
Well that's a whole other rabbit hole question/topic!

You're gonna get a vast difference of opinions on that question, especially taking into account the cost of the performance difference!
2
Jul 15, 2026 10:10 PM
5.2K Comments
Joined Aug 2006
hugeJul 15, 2026 10:10 PM
5.2K Comments
Quote from carbondeal View quoted comment :
For subs honestly what I found for theater at least you need a 15". Plus low end extension cheap subs like this just won't do. Max db output imo don't matter as much as low range and box tuning for 17Hz.
Good point. I think this is true. I have 2 of the monoprice and doesn't sound that great. Not bad, but could be better
Jul 16, 2026 11:10 AM
2.8K Comments
Joined Jul 2004
ilovetofuJul 16, 2026 11:10 AM
2.8K Comments
Tempting price but the reviews regarding amp failures are concerning, so I'm reluctant to take a chance. Also, I don't know about the 12" Dayton but I bought an 8" one and couldn't use it for TV/movies because it powers off too quickly in "auto" mode if the receiver isn't constantly sending it a signal. I ended up using it with a stereo system for music, and it's fine for that.
2
Jul 16, 2026 1:37 PM
1.4K Comments
Joined Nov 2009
TNFergusJul 16, 2026 1:37 PM
1.4K Comments
Quote from FairBorder6027 View quoted comment :
So two of these beat a single rsl 10e? Hmmm
Shocking, eh...
1
Jul 16, 2026 1:42 PM
1.4K Comments
Joined Nov 2009
TNFergusJul 16, 2026 1:42 PM
1.4K Comments
Quote from AquaVolcano980 View quoted comment :
The Dayton only has 200 watts vs. 400 for the Monoprice, the Dayton uses spring clips instead of binding posts for speaker level connections, and is also made in China. The reviews on Monoprice don't mention a single amp failure, so I'm not seeing the benefit of the Dayton.
Customer service, for starters. But I wouldn't look on an OEM web site for reviews of a product. Who knows what may have been removed. The Amazon reviews are pretty bleak compared to the Dayton. For whatever that's worth.
1
1
Jul 16, 2026 1:43 PM
104 Comments
Joined Nov 2015
DJ_Cat_DadJul 16, 2026 1:43 PM
104 Comments
How would this do for a basic sound system?
Jul 16, 2026 2:07 PM
29 Comments
Joined Jan 2016
k4ylrJul 16, 2026 2:07 PM
29 Comments
Quote from DJ_Cat_Dad View quoted comment :
How would this do for a basic sound system?
More than adequate for your basic 2.1 or even 5.1. If this frees up some budget to get better speakers or take your 2.1 to 3.1 or even 5.1 it is a worthwhile trade off IMHO for all but the most discerning of HT enjoyers.
1

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Jul 16, 2026 10:39 PM
22 Comments
Joined Nov 2024
SmartFriction5417Jul 16, 2026 10:39 PM
22 Comments
Quote from CalmMitten9192 View quoted comment :
Get the Dayton CS1200 (improved legendary Sub-1200) for a little more and you have something that both sounds good and where you have a much higher chance of finding a replacement plate amp if it ever fails than with this disposable China sub. Nothing against mono as a company and I have some of their THX speakers which are awesome.
Monoprice actually sells there plate amps individually now

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