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    Monoprice 12in 150-Watt Powered Subwoofer, Black
    Product # 9723
    In Stock This item should ship tomorrow (9/19/2018) if ordered within 23 hours 40 minutes
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    Model 9723
    Speaker Type 12" High Performance Powered Subwoofer
    Driver 12" Reinforced
    Amplifier Power Output 150 Watts RMS, 200 Watts Peak
    Frequency Response 50 ~ 250 Hz
    Lowpass Crossover Adjustable from 50 ~ 150 Hz
    Functions Power (On/Off)
    Inputs High Level (speaker), Line (RCA)
    Dimensions (HxWxD) 17.0" x 17.3" x 17.5"


    CEA-2010 Measurements @ 1m courtesy of Brent Butterworth

    Model Driver Loading 80 Hz 63 Hz 50 Hz 40 Hz 31.5 Hz 25 Hz 20 Hz
    Monoprice 9723 12" Ported 121.6dB 119.6dB 115.6dB 109.9dB 104.3dB 98.2dB 90.3dB

    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 37 questions Browse 37 questions and 54 answers
    Hi, I just received this subwoofer. Unpacked and installed with my pioneer 5.2 receiver. However, I am noticing 2 very strange things - the moment I switch it on (switch at the back) there is a very loud pop. Second, there is considerable humming without even being connected to a receiver. After connecting and playing some music, the humming is getting louder. Even at low levels I can hear the humming. Has some else also faced this problem? And what is the solution to this?
    A shopper on Oct 23, 2017
    BEST ANSWER: I opened up into the power system on the one I bought. Good luck finding one that works right - Fair electronic's, sloppy assembly.
    I have a question about the internals of this subwoofer: Does it use an ADC and/or DSP in its signal path?
    A shopper on Jul 1, 2017
    BEST ANSWER: ADC = Analog Digital converter? No
    DSP = No.

    It accepts only analog signals and works only as a crossover. It should be fed by something doing the A/D conversion and/or DSP in front of it.
    Can a subwoofer cable/Digital Coax Cable be used to connect this subwoofer to a receiver?
    Hasumi M on Jun 25, 2017
    BEST ANSWER: Yes, that type of cable would be best to connect this subwoofer to a receiver. However, since the receiver will only have one RCA port for the Digital Coaxial output and the Subwoofer will require both RCA ports on the input to be in use, it will require an RCA Y adapter. Which will be PID 6261.
    Monoprice 6in RCA Female to 2x RCA Male Digital Coaxial Splitter Adapter
    Monoprice 6in RCA Female to 2x RCA Male Digital Coaxial Splitter Adapter
    What class of amplifier is used on this subwoofer?
    Robb W on Aug 25, 2017
    Monoprice 12in 150-Watt Powered Subwoofer, Black
    Monoprice 12in 150-Watt Powered Subwoofer, Black
    Monoprice Premium Select 8-inch 200-Watt Subwoofer
    Monoprice Premium Select 8-inch 200-Watt Subwoofer
    BEST ANSWER: Due to the lack of cooling fins my guess would be class D.
    I see that this item (12in 150-Watt Powered Subwoofer) has both a line level input and line level output. What signal goes to the line level out? Is it "pre" or "post" crossover? In other words, if the crossover point is set to 50Hz, is the line out the "post" crossover signal above 50Hz or is the line out a full range "pre" crossover pass through? I can't seem to find that info in my reading here.
    New User U on Nov 16, 2017
    BEST ANSWER: The LINE IN and the LINE OUT are just a "pass through" method of getting a signal into and out of the subwoofer. If you have a multimeter, set it to the OHMS function and I would venture to say that you will read continuity (i.e. ZERO OHMS) from the RCA's center pin of one channel's LINE IN to the center pin of the RCA's LINE OUT within the same channel. It is just a convenience in the event that you are feeding the sub from the output of a preamplifer and have to continue the signal flow on to your power amplifier instead of using a "Y-splitter" cable adapter.
    My audio receiver only has a single monaural audio output. This subwoofer has separate line in L and R inputs. Will this work well with my receiver? Or is an adapter of some kind needed so both L and R inputs are filled in? From what I understand, and I may be mistaken, there's no L/R difference with the audio sent to a subwoofer.
    Abdul D on Dec 2, 2016
    BEST ANSWER: You will only need to use one input, the red or white, no difference. Do not use the y-cable adapter because it will put your sub out of phase and not sound properly.
    I would like to know. what is the solution to the humming problem?
    A shopper on Nov 16, 2017
    BEST ANSWER: First, try a grounded plug. Second, plug it into the same outlet that your A/V receiver/amplifier is plugged into.
    What does the sub weigh?
    Richard D on Aug 3, 2017
    BEST ANSWER: About 40 pounds.
    Is product #24613 just the open box number for the 9723?
    Martin H on Mar 17, 2018
    Monoprice 12in 150-Watt Powered Subwoofer, Black
    Monoprice 12in 150-Watt Powered Subwoofer, Black
    Monoprice 12-Inch 150-Watt Powered Subwoofer Black (Open Box)
    Monoprice 12-Inch 150-Watt Powered Subwoofer Black (Open Box)
    BEST ANSWER: Looks identical, def a good deal if so. Mine plays quite well w/my Denon AVR-X3300 and ELACs.
    OK, pre purchase "Q" - the manual appears incorrect in regard to the wiring for a receiver with only regular speaker outputs - the manual shows output from receiver going to "high level output"! Shouldnt the output from receiver go to INPUT of sub then output of sub go to the left and right channel "satellite" speakers??? Please advise. Thanks.
    Arnold R on May 26, 2017
    BEST ANSWER: Thank you for your question. There would be a couple of different ways to get the subwoofer connected depending on the receiver you have. Should your receiver not have a subwoofer RCA Digital Coax out then you can connect via the Hi Level In and use the Hi Level out to the front speakers.

    Should your receiver have the RCA Digital Coax Subwoofer output then you would be able to connect using an RCA Digital Coax cable (Such as PID 6305) from the subwoofer output to the 2 RCA line In on the subwoofer. You would need an RCA female to 2 RCA male adapter (PID 6261) so that you can connect to the L and R Line in on the subwoofer. Then your front speakers will simply be connected to your receiver.

    Should you require additional assistance, please reach out to our technical support team with a detailed question via any of the methods available here:


    Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
    Is the frequency response only good to 50 Hz? I would think a ported 12 would play deeper than that....
    John L on May 11, 2017
    BEST ANSWER: The sub is definitely rolling off below 50hz but 50hz is LOW for a most purposes. See this review.


    It's a $100 sub! It's awesome for the price (and easily for a lot more)
    Anyone find an end table that fits over this thing? The ones I have is just an inch shy.
    A shopper on Dec 11, 2017
    I will be connecting JBL LSR305 monitors to my computer? Can I connect this subwoofer to this system? If so, what cable will I need?
    Alan Y on Nov 21, 2017
    BEST ANSWER: The JBL LSR305’s have XLR. and 1/4” signal inputs witch asssumes you are going through a mixing board and then into the speakers. If you are coming straight from the computer, you will need an adapter cable to go to both the JBL speaker and the subwoofer. The subwoofer has both speaker cable inputs and rca line inputs, so you have options. Also, if you’re computer has a multi-chNnel sound card, it may have a separate subwoofer output that can go straight into the subwoofer.
    Does the subwoofer automatically power off when it no longer receives a signal?
    A shopper on Jun 19, 2018
    BEST ANSWER: Use the Auto On switch in the ON position. The subwoofer will enter standby mode after about 2 minutes if there is no signal detected.
    Can you remove the Monoprice logo cleanly?
    A shopper on Jan 26, 2018
    BEST ANSWER: I have purchased over 20 of the 12" powered subs and have not yet been asked to remove the logo plate. That said, because Monoprice chooses to print their name on everything from master cartons, inner cartons and bags, as well as the items themselves, is my biggest challenge with using their products.
    If they would give resellers the option to choose between standard or sanitized packaging and products, they would significantly increase sales. In my case by over 50%. But they are owned and administrated by Asians, who while very astute at production, do not think like Americans when it comes to sales. They have a lot of pride and love to see their name on everything. I have several businesses and it is the same when purchasing from Chinese, Koreans, Japanese and other Asian manufacturers.
    To answer your question, I believe you can remove the logo plate, either with the careful use of a heat gun or solvent, applied to the grill cloth from behind the logo. I hope that makes sense. Good luck.
    where is the port located? is that the back of the sub?
    Brian F on Jan 12, 2018
    BEST ANSWER: The subwoofer cone faces forward. The port faces down, centered on the bottom.
    Who makes this unit?
    What brand name is it please?
    New User U on May 22, 2018
    BEST ANSWER: No clue on who made it - probably some factory in China - but it is a Monoprice branded item, like most other items here on the Monoprice website.
    it stopped working after a few months...anyone has a quick fix? When I turn it on I can only hear very minimal bass with max volume, I've tried changing the setting on my amplifier but no luck!
    A shopper on Oct 16, 2017
    BEST ANSWER: First thing I would do is connect it to anothet source to determine if it is the sub or receiver. If it is a sub issue I would next try a different input connection and see if it persists
    Will this work with the monoprice 25w tube amp?
    A shopper on Aug 13, 2017
    BEST ANSWER: Yep. It has both speaker level and line level inputs, so it'll work with anything.
    We would like to install the subwoofer in a wall located in a closet. Will that be OK? Would we have to install a speaker cover on the wall to make it work? Thanks.
    A shopper on Apr 8, 2017
    BEST ANSWER: Not exactly sure what you mean. Is your intent to place this in a closet in an adjoining room and have the bass fill another room? If that is the case, then that may work.

    I don't think that is ideal, but the bass will be better than no sub.

    I have one in the closet in the room w/one of my systems as there is no room anywhere else. I just keep the closet door open.
    Can two of these (9723) be used on a Yamaha HTR-5560 receiver?
    A shopper on May 28, 2018
    BEST ANSWER: Yes, if that receiver has a subwoofer output.
    Can I use this as a receiver for other passive speakers?
    A shopper on Jan 11, 2018
    BEST ANSWER: No, you cannot.
    What are the dimensions of the sub?
    A shopper on Jan 8, 2018
    BEST ANSWER: 17.0" x 17.3" x 17.5"
    I have a denon s530 receiver which has one output for sub. Connected using rca cable just to left line out. Would this way sound the best, or is there a preferred way?
    A shopper on Dec 19, 2017
    BEST ANSWER: You could do that or purchase a Y-Splitter.
    Could you please tell me, can l connect my speakers to the sub and then the sub to where the speakers were?
    A shopper on Nov 18, 2017
    BEST ANSWER: That is the purpose of the HIGH LEVEL input and output connections. Will work just fine.
    Can I wire up a transducer to this sub?
    Bryan E on Jul 28, 2017
    BEST ANSWER: Well... It already includes a transducer, but you can daisy chain the speaker level inputs to another sub, if you want...
    What kind of cables do I need to connect this subwoofer to my 2.0 stereo system? It has a 2.0 amplifier.
    A shopper on May 8, 2017
    BEST ANSWER: Hello, thank you for your question. In order to better assist you, please reach out to our technical support team with a detailed question via any of the methods available here:


    Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
    Hi, if this unit is sent to New Zealand where we have 230 volts will the PSU be changed to match the local condition?
    A C on Jan 21, 2017
    BEST ANSWER: Hello, thank you for your question. Unfortunately you will need to use a separate voltage converter in order to use this product in another location like New Zealand. I apologize for the inconvenience
    Hi, what dimensions are the delivery box and what weight please?
    A shopper on Jun 21, 2018
    Can I go from the speaker out on my receiver to the high level in on the sub, THEN out the LINE LEVEL OUT to a soundbar?
    Chris K on Nov 20, 2017
    4.5 / 5.0
    297 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Star
    Amazing Sub
    This sub is nothing short of astonishing. I just built a super budget theater in my living room using almost all mono-price gear: 5 in-wall speakers, this sub and all the cabling. It's my second theater and was supposed to be cheap and out of the way (My main theater is well over $20k worth of gear built with B&W Nautilus speakers, etc.).
    I bought this sub hoping it would add a little bit, but not expecting much. It's in a 28x36 foot room with ceilings vaulting to 16' so it's a ridiculous amount of space for any sub let alone a budget one. I was hoping it would just add a bit of bassy flavor. I wasn't expecting what I got.
    What I got is a complete transformation of the sound. It's richer, much deeper, can go much louder... all the things I am used to getting with a much bigger sub in a much smaller room.
    The audio world is full of things called "sub woofers" which are nothing of the sort. This $104 gem is the real deal. It's far from perfect and I wouldn't take it downstairs, but it makes plenty of low end that's not boomy. It's not the one note "bass" that you get from cheaply built/designed subs. It adds greatly to the theater and gets out of the way when it needs to. And all at a price that wouldn't buy the worst sub at most local stores.
    Amazing job! Truly amazing. I'm buying another one for my computer.

    PROS: Nice sounding, nice looking. Real bass with good note definition. Powerful. Amazing price.

    CONS: No switch to disable crossover for home theater setups where the receiver is crossing over the sub (but this is probably a non issue).
    Volume knob a bit sensitive (another non-issue since almost all receivers allow fine tuning of sub level)
    December 5, 2012
    Good Bass, But it has Some Problems

    PROS: Good bass response. I would be hard pressed to imagine a setup that required more bass than this in a regular home.

    CONS: Auto-On feature does not work with line level volumes. During quiet points in the movie, the sub will turn off and it takes a second for it to turn on once it detects the need to produce bass.

    Minimal hum from power source. Even with all audio cables disconnected, the sub will have a 60hz hum coming from the speakers when plugged in and turned on. This hum is not affected by changing the volume on the back of the sub. The hum is not noticable while watching TV, but in a quiet empty room you can notice it.
    June 17, 2014
    Some say that "for the money, this is the best you can get". Well I have owned JBL, Bose, Polk Audio etc and this woofer meets the standards of all previously named companies. Given a little playing around with the crossover and volume on both the woofer and your amp, this thing will shake your house (and your neighbor's too). I live near an AFB and i hear Osprey's and Helicopters overhead daily, this reproduces that feeling accurately. Never been in an earthquake, but when it happens in the film it feels like I'm in what i think how it feels. When listening to Today's Hits you can feel you're heart beat like the beet of a drum, as well as with Techno, Classic rock, and hard rock. Jazz and Classical really comes to life in the room: feeling the low drums and instruments like you're there. Great subwoofer for addition to anyone looking to add a new experience to you're entertainment.

    PROS: Loud crossover control

    CONS: Need to buy a mono cable and splitter for most newer amps (splitter not required but I think I may feel a difference when i bypassed it, could just be me though). You can find these cheap on monoprice or Amazon.
    April 28, 2013
    Another Monoprice winner!
    After buying a variety of very different items from Monoprice (from speaker wire to guitars to TV mounts, etc.) and having great luck with all of my purchases, I decided to try this sub to supplement the bottom end of my stereo music system in our family room. Overall, I have to say its the best $86 I could have spent improving the overall sound of this stereo system. The sub is capable of producing good quality, usable output down to about 30Hz in our room. With some playing around with settings and sub positioning, I was able to get the sub to blend reasonably well with with my audiophile quality bookshelf speakers. Together, they sound quite impressive. In terms of sound quality, I would rate it a 9 out of 10. My only complaint is that the minimum crossover frequency of 50Hz is too high if you want to run your main speakers full range and have the sub blend in without overlap. It would be nice if they could make a design change in future production runs to lower the minimum Frequency to 30 or 40Hz. I took off one point for that.

    As for those complaining that they need a Y adaptor to use with systems with one LFE output, you don't need it at all. Simply plug the LFE output into either there R or L input on the sub and it will work fine. There is no need to feed the open input with a signal.

    Overall, its a very good sub for the money. I strongly recommend it.

    PROS: Good sound

    Substantial output

    Nice cabinetry

    CONS: Crossover
    January 7, 2015
    Amazing for the price.
    It seems to perform as well if not better than my $250 Polk 10" sub. Wasn't sure how I felt about the sub until I calibrated the receiver. After some setting changes it made all the difference. For the price you can't beat this.

    PROS: Price.
    Fast shipping.

    CONS: Huge, but that is okay.
    March 17, 2013
    Awesome Sub for Very Little Money!
    I've had this sub up and running for a little over a year now and it's been worth every penny. I'm no huge audiophile, but I do know when music and movies sound good. Like others have said, a little tweaking here and there and I was able to get it to blend nicely with my 7.1 HT I built in my basement. Actually, all of my speakers in my basement are from Monoprice and they sound better then my Defenitive Technology speakers I have in my 5.1 HT system I have in my living room.

    PROS: Cheap, great speaker.

    CONS: My only gripe about this speaker is the feet on it. The feet come to a hard sharp point. I know they did this for carpeting, but I built my entertainment shelving in the wall with Sheetrock and these feet dig into the Sheetrock damaging it. I wish they had flat feet that came with it also. My rating of 10 is for the sub itself. I'd give the feet a 5. I'm sure I could change the feet out with something else, I've just never taken the time to see. So that's not Monoprice's fault.
    March 18, 2015
    Uuuhhh....how much is that speaker again?
    12 years ago I started a home theater but never really finished it. Bought a JBL sub and had a set of 10 year old Bose Acoustimass series 5s. Bought a Pioneer THX certified receiver and a old CRT Projector, as well as built a home theater PC. Nice setup on a budget and worked for what I needed.

    So a few weeks ago the sub died. Bad power supply, a known issue with this sub. Started reading around and found decent reviews for the Monoprice Sub, so I figured for that price I would give it a try. I recently bought a Denon 2313 Receiver and since it can drive 2 subs I figured I would get the Monoprice first and go from there.

    You know what? This is a pretty good sub. It takes a good amount of tuning and placement to get it just right, but the Audessy on the receiver has helped tremendously. Its tight, not boomy and fills in what the Bose system lacks in bass. I may even buy a 2nd one if I get the bass right. I was blasting away MeatIoaf's Bat Out of Hell and and taping sheetrock in the basement when my wife came down from the 2nd floor bedroom pretty pissed off because I was rattIing the windows upstairs. I recently added a new projector and may even replace the Bose speakers ( which are getting a little buzzy) with the Monoprice in wall ones. I already bought one of their center channel in wall units and it has impressed me. If people knew the markup in audio equipment, especially speakers, they would give Monoprice and 2nd look.

    PROS: Price
    Decent Bass

    CONS: Bass not as low as I would like but its damn close.
    December 30, 2012
    But It Now Before Monoprice Finds Another Company to Produce It!
    This is not a Hsu Research VTF sub-woofer... But it's unbelievably close! It's also not $1000. It's a fraction of the price. It's deep, it's crisp, and it shakes the hell out of my house. It comes on subtly... no, it sneaks in while you are busy being seduced by the Sirens of treble; it comes in, sits down, and beats the crap out of your listening room but never at all seems to overwhelm. It complements itself as a part of an orchestra and not as an intruder. Well-made, heavy, and way big... I don't know how Monoprice does it. This is a coup d'état of performance. Buy it before Monoprice finds another manufacturer.
    January 29, 2017
    1 year ago
    A lot of sub

    PROS: nice input/output setup
    seems sturdy
    crazy price/performance ratio
    not too boomy. clearly a real sub and some thumpy excuse to waste 400w

    CONS: A few small things that take this away from being a ten:
    dust and lint magnet
    cheap look black wood finish on the top
    just the tiniest bit boomy
    crossover and gain knobs are not the clearest and it is difficult to tell exactly what you have set it to. I have some idea what the crossover is set to but there is no way to tell if it, say, 80 hz or 90hz.
    March 14, 2013
    Most satisfying purchase in years!!
    All I can say is that for $100 this thing sounds too good to be true, but it's not. It is loud! I don't know enough to get technical on ya, but it sounds great, and keeps sounding great as you turn it up. These people that are complaining about all the things it doesn't have are laughable. How do you think they kept the price so low??? The way I see it, is even if you find something you don't like about it, relegate it to a secondary sub!

    PROS: Price, look, packaging, sound

    CONS: none for me - I don't really get the reason for the Y connector, but it's a small thing.
    March 22, 2013