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    Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker and Spring Reverb
    Product # 611815
    In Stock This item should ship today (9/21/2018) if ordered within 1 hour 49 minutes
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    Model 611815
    Driver 12" Celestion Seventy 80
    Rated Power 15 watts
    Frequency Response 80Hz ~ 10kHz
    Total Harmonic Distortion 0.5% (clean mode)
    Hum and Noise -75dB below rated power
    Input Impedance 1 megohm
    Power Consumption 50 watts maximum
    Amplifier Load Range 8 ~ 16 ohms
    Preamplifier Section 3x ECC83/12AX7 preamp tubes
    Power Amplifier Section 2x EL84 power tubes
    Dimensions 16.8" x 17.1" x 9.25" (427 x 435 x 235 mm)
    Weight 25.4 lbs. (11.5kg)

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    Browse 48 questions Browse 48 questions and 233 answers
    Does the newer version of this amp use the same circuit as the previous version? I noticed that the spring reverb has changed, too. But is the audio circuit, both pre-gain and post-gain, the same as the previous verison?
    New User U on Aug 7, 2017
    BEST ANSWER: Thank you for your interest in this tube amp. The circuit is 100% the same as previous version. We saw the reviews about the reverb and changed it our with a better one.
    I received the item number as Stage right and it looks different than the picture. What should I do???
    Nattapong A on Jul 26, 2017
    BEST ANSWER: Thank you for your question. The unit that is in the picture would be the outdated version of the unit that is being sent out. 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
    What are the specs on the FX Send/Return. Is it parallel or series? If it is parallel, does it do a 50/50 wet/dry mix?
    A shopper on Mar 14, 2017
    BEST ANSWER: Thanks for your interest in the tube amp. The FX Send and Return are wired series. This will allow you to use the Send as a line out with no effect on the tone. It also allows the return to be used for loop pedals, Play your riff clean to loop, then crank up the gain and lay down a dirty lead. Send and Return are both -10db.
    Why no standby switch? With a solid state rectifier, you're putting the B+ voltage on cold plates. This will drastically shorten the life of the tubes.
    A shopper on Jan 4, 2017
    BEST ANSWER: You do not need a standby switch on this amp, in fact you do not need one on most guitar amps. Cathode striping happens on high power tubes like ham radio, radio transmitters.
    Will Monprice ever release this amp again? the date available has slipped several times.
    A shopper on Jun 20, 2017
    BEST ANSWER: Thank you for your question. Unfortunately, we would not have any additional information other than the estimated time of arrival listed on the page. I would recommend clicking the "Notify Me" button at the top of the page to be emailed once more stock is received.
    Hello, Is it necessary to bias replacement tubes in this amp when needed? Thanks
    A shopper on Oct 25, 2017
    BEST ANSWER: I agree, today's tube manufacturers have released some tubes on the market that are very different from the NOS tubes of the 1960's. Tubes had different requirements and military contracts designs were made for Rugged, quiet and extended application use. How ever Groove tubes does a lot of testing on tubes they purchase and NEW TUBE or STR Special tube requests are available. Only issue I have experienced is, low power after short use, and Microphonics. The old tube amps sound great with the average house voltage at 130 Volts they were designed to run on 115. New amplifiers often have circuit boards solid state rectifiers. Get some good Fully matched sets of tubes and will be happy. The TUBE STORE is a good place. Ebay is a dumping ground for NOS tubes that test NOS but are used and often a good buy. The new TUNGSOLS, are good, THE NOS SHUGUANG are good EL84 power tubes, pre-amp tubes are cheap but I recommend to get matching triodes.
    Is there a schematic available for the 15w version?
    A shopper on Oct 26, 2017
    BEST ANSWER: Look for Laney Cub 12r. Same design except Laney has digital reverb.
    what are the dimensions?
    A shopper on Jan 18, 2018
    Is the stock speaker 8 or 16 ohms?
    A shopper on Jul 10, 2017
    BEST ANSWER: Thank you for your interest in this guitar tube amp. The Celestion speaker is rated at 8Ω. The external speaker output will support minimum 4Ω.
    What kind of bias does this amplifier have?
    A shopper on Dec 7, 2016
    BEST ANSWER: The output stage is "fixed bias" with an adjustment pot. The other stages are self-biasing and so don't need adjusting.
    What brands/models of tubes & reverb tank would any of you have recommendations for? Or has the somewhat common 're-mount the reverb tank with rubber grommets' made a drastic improvement? I'm not necessarily needing either at the moment, just curious for future reference. Thanks!
    JOSEPH H on Feb 10, 2017
    BEST ANSWER: I dropped in a pull from a Fender Blues Junior that I picked up used (just the tank). It sounds fine, but interestingly the reverb is now a lot less pronounced compared to the stock plastic tank (I have the original amp design). Not sure whether that's a function of the tank, the design, or just me doing something weird when I hooked it up, but either way I'm not really complaining. It sounds good!
    What circuitry/tone stack is this amp/preamp styled after, Fender Tweed, Fender Blackface, Marshall Plexi, etc.?
    New User U on Jan 11, 2018
    BEST ANSWER: The tone stack is from a Marshall JCM800, with a smaller power amp attached. Overall it's not a direct clone of a Marshall, but it's definitely that flavor. If you want to listen to samples on Youtube, search for Laney Cub 12R reviews, there are quite a few. It's identical internally (down to the markings on the PCB), except for the reverb..
    Has anyone else had an issue with the high end frequency range? I have to really crank the treble on the amp and my guitar.
    A shopper on Jan 3, 2018
    BEST ANSWER: Don't forget to adjust the tone control too.
    Is the foot pedal included with the amp?
    New User U on Dec 12, 2017
    BEST ANSWER: No Pedal included or needed. It's a 1 channel amp. There is a switch that lowers the wattage from 15 to 5 watts if needed. Great amp for small bar gigs. Sounds awesome and has been very reliable so far. The amp takes pedals very well and has a killer sound with them.
    I have a question about the wall plug. It appears to be NOT GROUNDED. Is that so, and Why?
    New User U on Feb 12, 2017
    BEST ANSWER: Mine has a grounded (3 prong) plug.
    I got my new amp today - 15w combo! I notice that there is very little low end on mine - is this because the speaker requires some time for break in? I read conflicting info about this. I have very strong mid ranges and very sharp highs, but nothing down low. Would swapping out any of the tubes help? Any other suggestions?
    New User U on Oct 2, 2017
    BEST ANSWER: The 70/85 speaker is notorious for needing some time to break in. If after 30 or so hours of play it's still not to your liking, swapping in a Vintage 30 did wonders for mine. WGS may also be a good source for lower priced swap ins as well.
    what is the 70/80 celestion speakers wattage rating?
    New User U on Sep 3, 2017
    BEST ANSWER: 80 watts
    where can i get a cover for this amp?
    New User U on Jan 6, 2018
    BEST ANSWER: Good question...I haven't looked for one...but I image Guitar Center or Sam Ash etc probably has something that fits....I just keep mine covered with the plastic bag that came with it.
    How do you like this amp...I have 2 of them and think they are GREAT amps...!!!
    My amp has a hum after it has been on about 5 min. gets louder as volume is turned up. It even hums if I am using my wireless guitar system and no cable is this normal?
    New User U on Mar 19, 2017
    BEST ANSWER: You know why an amplifier hums? Because it doesn't know the words. Sorry, couldn't resist.

    I am sorry you are having trouble with your amp. Sounds like there is a ground loose somewhere in the amp. Please contact customer service and get a replacement.
    Does the amp come with the foot switch for reverb?
    A shopper on Dec 25, 2017
    BEST ANSWER: No, mine didn't, but any on/off switch with a 1/4 inch jack works and they are very inexpensive.

    I own Vintage Marshalls, Traynors and hi-end boutique amps, and now 2 of these for playing in true stereo. Very sparkly 3-D sound you can only get with tubes.
    So this is a one channel amp?!
    A shopper on Feb 5, 2018
    BEST ANSWER: Yes, it is a single channel amp. It does have separate Gain and Volume but you can not switch between clean and drive.
    I don't see anything about the power/voltage rating in the specs. Can this be used for voltage in both USA and Europe?
    New User U on Mar 5, 2018
    BEST ANSWER: It is for USA 115-120 volt application. Just buy a european power strip converter to use in Europe and you'll be fine. I just played a theater gig in Atlanta with this on the 1 w setting through a vintage Marshall 4x10 cab. sounds sparkly, clean and excellent string definition. I'm not affiliated with the maker. Just giving you a heads up I get compliments on a strat or LP plugged directly into it. Been playing since 1980 in bands.
    Are knobs at the top or at front panel?
    A shopper on May 6, 2018
    BEST ANSWER: Mine are on the front panel (the "stage Right" brand, not the older Monoprice brand) right where I prefer them. BTW, it's a great amp that may need a little TLC but a steal even at full price.
    Where to get foot pedal mentioned here?: "Spring Reverb: The genuine spring reverb adds a lush spaciousness to your tone and can be switch on or off using a foot pedal."
    Geoffrey F on Sep 12, 2018
    BEST ANSWER: If you look at the Monoprice 15 watt on Amazon they list Fender foot pedal that is often bought with the amp. Personally, I haven't bought a foot switch and just leave the reverb on.
    Does this amp have a headphone jack?
    A shopper on Jul 18, 2018
    BEST ANSWER: Sorry, no it does not have a headphone output jack. It does have an external speaker output for a larger cabinet, a foot switch input and effects in and out jacks.
    the three preamp tubes don't look the same. Two are identical and the third looks different. The one that looks different is on the far right when looking from the back of the amp, Are the preamp tubes all really 12ax7?
    Robert W on Jun 17, 2018
    BEST ANSWER: The tube far right from the back is most likely for the first gain stage and is therefore most prone to microphonics so it is likely the most quiet of the three. They are most likely all 12ax7 although the driver and/or reverb tube, depending on the circuit, could be 12at7. This is a question for the manufacturer.
    Anyone know if it can go to 11?
    eric p on Dec 17, 2017
    BEST ANSWER: this amp is pretty loud. we put it in my son's room and he can't turn it up past 3 !!! it is just too loud.
    also, the tubes can be upgraded for an even more formidable sound. But the amp as-is was perfect for us.
    Does it have a line out for my 4x12 marshall cab?
    A shopper on Feb 5, 2017
    BEST ANSWER: Yes it has a 8-16ohm speaker out, effects loop, reverb footswitch input,
    if i want to change the EL34 power tubes is there a way to bias them?
    joseph b on Jul 15, 2018
    BEST ANSWER: Most tube types are not interchangeable without circuit modifications. I would not recommend it.. But if you did, you could put 4 KT99s, new power supply and output transformers and soup it up to 200 watts. Low cost amp not worth it. Buy what you need.
    4.7 / 5.0
    403 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Star
    Updated Stage Right new style
    Have to give props to MP for the amp and the RMA and warranty process. Had problems with the first amp, something seemed like grounding and/or the tone and reverb controls were amiss with a constant, screeching hiss. Sent it for exchange and had the replacement in very acceptable turnaround time. Appreciate the customer service dept's efficiency and assistance.

    The broken amp was the older TV style, and the replacement is the new style with controls on the front. It is night and day quieter, the reverb is more powerful with beefier wiring and connections, and I think the EQ is even sweeter and more chimney on the newer style than it was on the old style. The 70/80 speaker is an underdog that I think sounds good in this amp, and it likely will become even more smooth after fully broken in. If one adjusts the EQ and other settings carefully, it sings. Just have to give it a chance before swapping to whatever the this speaker is cool or not now internet forum gods tout. Although I like the look of the older style just a tad more, the functionality and upgraded features of the new design trump looks any day.

    No regrets.
    October 13, 2017
    Nice sound, needed a little work
    Out of the box this amp sounded only ok. I swapped the tubes out for a set of mesa ones I had in a drawer which improved the sound significantly. The biggest problem was the reverb tank.

    At anything above the lowest volume the reverb would rattle like crazy giving a clanging type sound. The tank was secured under the speaker to the cabinet with glue and a piece low density foam which allowed it to move excessively, causing the springs to smack into the tank housing.. I removed it from the foam and secured it directly to the cabinet with a set of rubber grommets which stopped the noise even at full volume.

    Overall a great amp for the price but needed a bit of work to get it to its full potential.

    PROS: Nice speaker, good tone, cool low wattage input, good tone controls.

    CONS: Not the nicest tubes, poorly secured reverb tank, tolex had some bubbles and rough edges.
    October 27, 2015
    Great amp, and I'm fussy!
    First, this is the first review i have ever written! Spent thousands on music gear in the past 50 years and never was ths impressed. Tone monster! Yes, you can spend a lot more and get more, but come on, $230 dropped at your doorstep in a few days is pretty unbeatable. I'm old so that means I'm experienced (lol!). Seriously, I've owned and played just about everything out there. I'm not a tone snob, some of the best guitar sounds come out my Roland Micro Cube! This thing rocks, blues and jazzes. Loves pedals, ext speaker jack, effects loop, 1 watt input, Celestion 70/80 12" speaker and tone, tone, TONE! Reverb sucks, but hey, gives me something to mod on this thing, which is why I bought it. Was going to retube it, no need. Stock Ruby's are breaking in nicely. No need to replace the speaker either, it just needs 20 hours of hard playing to break in.

    PROS: Tone, price, quality.

    CONS: Reverb
    March 11, 2016
    Great Classic Rock Tones
    I've been plying guitar for about 30 years. This is my first ALL tube amp. I've had several tube pre-amps and modeling amps with dozens of effects but I'm pleasantly surprised by this bare bones combo. I have no issues with the reverb (but would prefer a longer decay time). I did notice that the tiny reverb tank is mounted on a vibration isolating foam pad. I'm not sure if this pad is present on the units where people have mentioned issues with the reverb. The variety of tones available is quite good. With the gain boosted I'm able to effortlessly get a nice feedback going when I want that hard rock Hendrix vibe. Pinch harmonics also chime out with ease. Playing ZZ Top or Zack Wylde has never been so easy and this is without an overdrive pedal. As others have mentioned the 1 W setting seems more like 5 W but this isn't an issue. The 15 W input gets loud enough to scare my wife and daughter out of the house. At this point I'm enjoying the amp "as-is" and haven't tried any effects pedals or used the effects loop. A head only version of this amp would be a perfect addition to the Monoprice line-up. I've been wanting an all tube amp for years but could never justify the purchase. I saw the price, took a gamble and couldn't be happier. Look for a coupon and free shipping and take the plunge. You won't be sorry.

    PROS: Great price. Fun to play through. Classic "guitar here" rock tones with just an amp, guitar and cable. VH, Zep, Jimi .... it's all there.

    CONS: No cons at this price but a tweed version or head only version would both be killer.
    July 23, 2016
    Awesome Tone and a great value
    I was looking for a small 12" combo that I could use at home and take to regular blues jams without breaking my back, or the bank. This guy fits the bill perfectly. I usually dial in a clean tone and use pedals for tone shaping, but a turn of the gain knob will deliver plenty of warm "rock" tone. The 1 watt input works just as advertised. Just dial in the sound you like, and then switch inputs. Same tone, just quieter.

    PROS: Lightweight, plenty of volume to jam with a live drummer, and still get the same great tone as low volume with the 1 watt input.

    CONS: Tiny reverb tank sound gets pretty "boingy".
    November 25, 2015
    Love this amp
    I prefer this amp to my Blackstar HT40 and Mesa Dual Rectifier Roadster. The controls are simple and I can change the tone with pedals rather than fiddling with multiple amplifier controls. I know it's good to warm up with a standby switch (which this one doesn't have) but the single switch involves less forethought. Great sound, only slight background noise when the guitar is not playing.

    PROS: Great sound
    Light weight
    Effects loop

    CONS: Mediocre reverb
    Jack for footswitch but none available
    One knob was missing. Monoprice originally wanted me to return and reorder but I'll use a non-matching knob I have on hand if they can't find a knob. Hate to have them incur 2 way shipping for a tiny knob.
    September 10, 2016
    Superb 15-watt tube combo amp
    I bought one of these last week - excellent rapid shipping and good packaging. An amp as close to perfect as I can imagine. Lighter and with a better overall sound than any tube amp at *any* price that I've ever played through. My luthier was drooling after an hour of jazz and blues licks and plans to carry this amp in his guitar shop. The reverb is in fact just fine. The magic extra "Tone" knob modulates the Bass/Mid/Treble passive knobs and creates a terrific balanced sound across all pickup positions. Without touching knobs at all, I could switch between neck pickup, both pickups, and bridge pickup and had *exactly* the same volume and three really sweet sounds on my new Ibanez Artcore AS93 and a Gibson Les Paul in the shop. The Celestion 12" speaker is a gem, responsive and warm. My luthier would add a Standby switch and make the power cord modular (it sticks out the back slightly) to make the amp design perfect. The physical cabinet is *solid* with heavy chrome corners, internal clips for power cord and reverb tank cables, and an 8/16 ohm external speaker jack and effects loop on the back. It's also just plain beautiful with the warm cream Tolex finish.Write your review here. It must be at least 50 characters long. Consider whether you would recommend this product and what you like or dislike about it.