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    15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker and Spring Reverb
    Product # 611815
    $179.99 $199.99 On Sale 10.00% OFF
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    15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker and Spring Reverb

    15-Watt Tube Amplifier


    Get superior tone and flexibility using this 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker and Spring Reverb. Three industry standard 12AX7 tubes drive the preamp and reverb sections, while a pair of EL84 tubes deliver the punch. The spring reverb can be switched on or off using a foot pedal and the 3-band equalizer allows you to really dial in your sound. The cabinet has an open back and features a leather handle, cloth speaker grill, and a cream-colored, textured, synthetic leather exterior with chrome corner guards.


    Tube Amplifier
    Spring Reverb
    FX Loop
    Classic Styling

    Tube Amplifier
    Spring Reverb
    FX Loop
    Classic Styling


    Tube Amplifier: Three industry standard 12AX7 tubes drive the preamp and reverb sections, while a pair of EL84 tubes deliver the punch.

    Spring Reverb: The genuine spring reverb adds a lush spaciousness to your tone and can be switch on or off using a foot pedal.

    FX Loop: The FX loop allows you to insert effects between the preamp and power amp sections, giving more versatility to your sound.

    Classic Styling: Enjoy the tone and styling of the 40's and 50's with the classic cream-colored, textured, synthetic leather exterior with chrome corner guards.






    You Spoke, We Listened

    At Monoprice, we take cutomer opinions very seriously. We have taken our
    customer reviews to heart and improved the spring reverb and made some
    cosmetic changes to simplify operation over the previous version of this amp.


    15-Watt Tube Amplifier





    Tubes are King

    In a world dominated by innovation and digital emulation the vacuum tube or valve is
    still the undisputed king of the guitar amplification world.


    15-Watt Tube Amplifier





    Versatile and Durable

    The amp features a low and a high input, an improved reverb tank, an FX loop, and a
    3-band equilizer. The Celestion Seventy 80 is detailed and crisply defined, with a tightly
    controlled low-end and punchy, aggressive upper mid-range. The top-end response is
    also subtly increased.


    15-Watt Tube Amplifier





    1 Year Warranty

    Buy with Confidence

    Monoprice not only stands behind every product we sell with a 1 year replacement warranty, we offer a 30-day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund.



    Quality at a Fair Price

    Quality at a Fair Price

    Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.



    Hassle Free Packaging

    Hassle Free Packaging

    Monoprice exists to bring simplicity, fairness, and confidence to technology choices. This product features recyclable packaging that is simple to open, cost effective, with minimal waste, and fully protective as it travels to you.



    Service & Support

    Service & Support

    You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions, both before and after the sale. Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs. Not to be outdone, our friendly and helpful customer service team is here to make your ordering, delivery, and any possible returns a quick and painless operation, from start to finish!






    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)
     


    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 21 questions Browse 21 questions and 61 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.
    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.
    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:

    www.monoprice.com/help?pn=contact

    Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
    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.
    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.
    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.
    Hello, Is it necessary to bias replacement tubes in this amp when needed? Thanks
    A shopper on Oct 25, 2017
    BEST ANSWER: You could, but it is not necessary. I used a matched set of power tubes which I think did help smooth things out.
    Is there a schematic available for the 15w version?
    A shopper on Oct 26, 2017
    BEST ANSWER: Schematic? I ordered the original design of this amp. They have since re designed. But I do not remember getting a wiring schematic when i received. But it's possible it comes along in the paperwork. Honestly i dont remember. One thing i can say about the amp. It is durable, gig worthy, and sounds great. Takes pedals nicely and is awesome for small bars. if you mic you can use anywhere. Have used for may gigs and still cranking. Very loud for it's size
    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've read that the MOD 8EB2C1B is a good replacement. Note that the wires going to the current reverb tank do not have the typical RCA plug ends, so you'd have to solder those on. There's a thread at TDPRI (telecaster forums) that has a pretty avid group of modders doing all sorts of things to this amp.
    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.
    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 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,
    Is there a way to also use this as a cabinet for external amp?
    New User U on Oct 12, 2017
    BEST ANSWER: Not without a slight modification. Basically you.d need to get wire with a couple of those spades on one end, and a 1/4" female jack at the other, to connect a standard speaker cable to the speaker. (After removing the spades coming from the amp of course). Something like that might work. But it's not made for it out of the box.
    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.
    Is there a way to bypass the pre and post to use this as a cabinet for another amp?
    A shopper on Oct 12, 2017
    BEST ANSWER: Thanks for your interest in this Tube amp. No, there is no speaker input direct to the speaker. You will need to disconnect the speaker leads and hard wire to your amp. If you use just your preamp you can plug into the FX return and bypass all internal filters and controls straight to the 15W power amp section.
    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: I have just the opposite effect. Right now I am running @1w: Tone-8;Vol.-8;Bass-2.5;Mid 4;Treble9;Gain-2. Try running your gain higher . I leave it at this setting on the 15w input as well. Funny you have the opposite of what I experience as dark tones, very "bluesy" when I first plugged in. It took awhile to find settings I liked as I tried with an acoustic Yamaha, Gibson Midtown, Melody maker, and Samick Telecaster.
    what is the 70/80 celestion speakers wattage rating?
    New User U on Sep 3, 2017
    BEST ANSWER: 80 watts
    Does the installed speaker have a Ohm of 8 or 16 ? Thanks
    New User U on Sep 3, 2017
    BEST ANSWER: It is an 8 ohm speaker.
    How do I fix the flickering of the on/off light as I play guitar?
    New User U on Aug 16, 2017
    BEST ANSWER: A few people mentioned this as a design flaw in online reviews I read. I suggest that you unfasten the light and check the connection, and if loose, tighten. I recall that one individual replaced the bulb without problems. Your best source of info on this problem will require an online search.
    can you use the output for headphones?
    A shopper on May 10, 2017
    BEST ANSWER: not really. it is a speaker out, and it is not stereo, like headphones are.
    Is the 50W speaker volume control (8241) compatible with the the 15W Tube Amp (611815)? I'd like to be able to run the amp up to full power into an external speaker but keep the volume down.
    Dave H on Sep 17, 2017
    15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker and Spring Reverb
    15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker and Spring Reverb
    Speaker Volume Controller RMS 50W (Rotary Type) - White
    Speaker Volume Controller RMS 50W (Rotary Type) - White
    4.7 / 5.0
    187 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    133
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    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
    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
    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
    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
    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
    Best Amp For The Money, Bar None!
    This amp has a very warm, almost dark, tone. That makes it perfect for blues, jazz, and classic rock and 80's style metal. I don't use the amp's gain very much because I have some killer OD pedals I stack in front of it that produce a sensational vintage rock tone I can vary from AC/DC to Metallica. I have cranked the amp's gain to test it out, and as expected it's very much vintage rock style. You'll get good crunch, but an OD or boost pedal will be required to get more distortion for modern stuff. It has very good clean tones - almost Fender-like. If I didn't know any better I'd swear this amp is a rebranded Laney Cub 12R. See for yourself if you think I'm kidding.

    At 15W it's plenty loud enough to gig with - as long as your drummer isn't a complete animal banging away on the skins!

    I haven't used the effects loop yet because there's really no need. unless I decide to use the amp's preamp gain. At that point I'll use it for modulation and time effects, as well as a noise killer.

    I'm rocking two of these bad boys in true stereo and let me tell you, they sound fantastic! Catch them when Monoprice runs a special and you can grab a pair shipped to your house for less than $200 each!

    PROS: Warm Tone
    Great For Blues/Classic Rock/Jazz
    Loud Enough For Gigs
    Portable (Light)
    Looks Good

    CONS: Quality Control can be spotty
    May 17, 2016
    Great bang for the buck
    I'm impressed, great quality and tone for the price. I bought it during a Monoprice sale, great deal with 20% off.

    I love that it has gain + master volume, and an effects loop. I'm guessing the "Tone" control is really a "Presence" control. I wonder if the schematic for this amp can be found somewhere, I wonder what circuit design this amp has modeled.

    I've got a number of tube amps (Marshall JCM800, vintage Fender Champ and Bronco, Crate VC). This is a perfect mid-sized amp for small rooms, with a great wide range of tones. The EL84 pairing has an expected chimey brightness. In terms of power, do you really need more than 15W? Probably not...and I love that about this amp. If you're playing small clubs you're probably gonna mic the amp anyway.

    The build quality was really nice. Cream tolex was perfect, no scratches/glue/peeling. Knobs turn smoothly. Some of the screws (which are recessed by washers) stick up a little high, but that's pretty minor.

    I wish the reverb was a longer spring reverb it's really short and "boingy". It's also extremely sensitive to the amplifier being touched/moved. Wish it had a standby switch too. All that said, for around $200 you have a really great sounding portable little amp.

    PROS: Value, tone, master volume, build quality

    CONS: Boingy short reverb, no standby switch, no detachable power cord.
    September 2, 2016
    First Impressions : A solid value
    Overall this a very good amp and an incredible bargain. I mean it. For the money you will not do better and probably not for three times as much money.



    The initial sound was very brassy (out of Fender / Lace Sensor's for crying out loud). The speaker was tight as a Scottish Banker to start with. A couple of hours later though the cone began to relax a bit and the sound warmed up. Still needs moderating and I haven't even hit this with the P90s or the TV Jones supers yet.



    Lots of fun sounds though. Really good versatility too. The sub watt setting is more like 5 watt setting.. not bedroom level, but not too bad either. It doesn't give you 'attenuator brown'. The sound retains the highs and upper mids (mostly) and so you really can go to town.

    PROS: Very good sound, strong versatility. Lots of fun from grumble to grind

    CONS: Not a whole lot of clean headroom. Sub watt setting is anything but. One control for reverb but a Tone and 3 band EQ? Sound is very stiff and a touch brassy at least to start.
    October 16, 2015
    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.
    August 22, 2017
    Purchased
    3 months ago

    In Stock This item should ship today (11/20/2017) if ordered within 10 hours 1 minute