Monoprice amp club

Fullmoon07

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CF Rowe

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Is anybody familiar with the effects loop in the Stage Right 15 watt amp? I'm thinking about making a volume box to drop the preamp level so I can drive the power tubes harder without getting the cops involved ;) I've read elsewhere that the Laney Cub 12r loop is parallel with a 50/50 wet/dry mix. Can anyone confirm if this is the case with the SR 15 as well? And if so will a volume pot in the loop still be effective? TIA! :)
 

sunnysal

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So...last friday i dragged my Monoprice 5 watt tube amp to a band practice room on a lark. While it had a hard time keeping up with the band by itself (though I must admit it was playable and hearable during all the blues tunes), I decided to plug it into a 4x12 cabinet that was sitting there. Well, this was a revelation; first off all...Bass! a nice, full sound, second I got a lot more volume out of the amp, mostly because I could turn it up farther to 3 or 4 o´clock without getting full distortion and compression (the amp itself tended to to simply begin to distort and compress above about 1-2 o´clock). Now I won´t be buying a 4x12 cab for my 5 watter but it is great to know you can get that full,m loud sound out of the amp if you want to! Anyone else plugging in an external cab to their 5 watter?
 

hoglundtw

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Buck - no real hum from mine. Shipped with frying bacon sound even when volume turned all the way down. Bad power tubes - asked Amazon to credit me for matched set of power tubes and they did, now sounds great. Also recovered it in tweed and looks fantastic. Will post pics.
 
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Keefsdad

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I've had mine for over a year now, just did another gig with it last night. The climate here is brutal, but I haven't had even one little problem with it, except for the first gig when i forgot the 1 watt switch was in and wondered all night why it was so underpowered:confused: I did upgrade the power tubes to JJ's.
 

Neteel

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Not true. I have one, and the reviews are 95% positive, lots of people are happily gigging with them I've opened it up and there are certainly no safety concerns.
I have one too, and I agree with you. It's a great Product and sounds really good.
I compared it to a Fender Blues Junior and I choose the Monoprice Stage Right for the tone quality (the Speaker too!) and of course the price.
Some peoples thing MADE IN CHINA Mean Junk!!! Everything is Made in China or Mexico! Yes China produce Quality and still at a good Price
 

backporchmusic

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Mine sounds better and better with time. Proper biasing and some decent tubes. WGS speaker, because I don't care for 70/80s. I am often amazed at just how sweet it sounds.

I would likely not be as amazed had I paid $1200 for it, but it still sounds terrific regardless.
 

Neteel

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Got A 15w, I had various 'mystery' noises that seemed like bad tube noises which ended up being a few bad solder joints on the main board. This has been an issue for a few Laney cub12's. Since reflowing the joints for the through-hole components haven't had an issue.

The 1w position is nicely loud and the 15w is not that much more. I typically run gain @ 3 and volume @ 5. I tried a bunch of different tubes and came back to all 12ax7's (pre,PI), v1 is a short gray plate GE and V2 & 3 long gray plate sylvania 6681/12ax7. Love Tung-sols and tungsrams but I am saving them for a Matchless clone I am building. Power tubes are EI that some guy on Ebay sold me and he didn't realize what they were, also very nice. Amp is, after the solder job esp, is really quite and takes pedals well.

Other then the soldering switching the reverb tank to a Mod 8EB2C1B, for me, took the reverb for umm ok, to on all the time and very usable. Tubes were a big improvement too. I have had a eminence GB128 and a red fang (the latter a bit f'd up so no report on it, going to Orban for some help) and I thought when I made the change to the eminence it was a huge improvement BUT I recently (yesterday) put the Celestion 70/80 back in and I really like it. It will stay, going to put the Emi's in a 2x12 I am building.

It it a great bedroom amp, great! But IMO its not the best choice for a band/any situation you need to play loudly for any extended length of time because the transformers are grossly undersized, hence the cost.
This Celestion Speaker sound really Good, I Love mine
 

Neteel

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Got A 15w, I had various 'mystery' noises that seemed like bad tube noises which ended up being a few bad solder joints on the main board. This has been an issue for a few Laney cub12's. Since reflowing the joints for the through-hole components haven't had an issue.

The 1w position is nicely loud and the 15w is not that much more. I typically run gain @ 3 and volume @ 5. I tried a bunch of different tubes and came back to all 12ax7's (pre,PI), v1 is a short gray plate GE and V2 & 3 long gray plate sylvania 6681/12ax7. Love Tung-sols and tungsrams but I am saving them for a Matchless clone I am building. Power tubes are EI that some guy on Ebay sold me and he didn't realize what they were, also very nice. Amp is, after the solder job esp, is really quite and takes pedals well.

Other then the soldering switching the reverb tank to a Mod 8EB2C1B, for me, took the reverb for umm ok, to on all the time and very usable. Tubes were a big improvement too. I have had a eminence GB128 and a red fang (the latter a bit f'd up so no report on it, going to Orban for some help) and I thought when I made the change to the eminence it was a huge improvement BUT I recently (yesterday) put the Celestion 70/80 back in and I really like it. It will stay, going to put the Emi's in a 2x12 I am building.

It it a great bedroom amp, great! But IMO its not the best choice for a band/any situation you need to play loudly for any extended length of time because the transformers are grossly undersized, hence the cost.
Thank you my Friend, I have a rattle in mine since day One, I changed the Power tube and same thing(rattle) now I will check my Board to try to find the trouble, and solder joints, I love this amp, the sound is Great, really good celestion Seventy /80 speaker. I just put 5 new JJ tubes on mine trying to find my rattle, I will find it on the Board, it sound's good.
I love the reverb too!, for me no needed to change.
 

Rick330man

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I've bought 3 of the Monoprice 15s. The first one I kept and tweaked. The second one I gave to my nephew as a birthday gift. The third I've left stock with the Shuguang tubes and the Celestion 70/80.

The only problem I've ever had is that the first one came with a bum EL84. I asked Monoprice for a replacement set of EL84s or a credit, as I had plenty of my own EL84s. They sent me a whole new set of tubes - power and preamp.

The Celestion 70/80 speaker sounds very good in this amp. Make sure you put a few hours on it and let it break-in before you rush to judgment. That said, a Greenback or an alnico sound better.

The stock tubes don't sound bad, but I did notice that each amp came from the factory with the bias set at or below 50%. I'd use the stock tubes for a good break-in period. After that, you'll find different tweaks that will help incrementally improve your tone. For power tubes, the Ei EL84s, the JJs and those old Soviet military 6P14P-EVs sound excellent. Make sure you bias the power tubes properly.

Also, to my ears, the Monoprice 15 sounds better with an old (not current production) 5751 in V3.

Just some thoughts based on my experiences.
 
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daiksa

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Also, to my ears, the Monoprice 15 sounds better with an old (not current production) 5751 in V3.

I have a 5751 and I tried it last night in V1. Didn't notice as much of a difference as I expected. I always thought V1 was the biggest change in tone, but maybe I'm wrong. Does the 5751 in V3 change the tone? Does it lower the gain with the 5751 in V3 so I can get more clean volume?
 

Rick330man

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I have a 5751 and I tried it last night in V1. Didn't notice as much of a difference as I expected. I always thought V1 was the biggest change in tone, but maybe I'm wrong. Does the 5751 in V3 change the tone? Does it lower the gain with the 5751 in V3 so I can get more clean volume?

My suggestion - and this is after many, many hours of experimenting - is that you leave 12AX7 tubes in V1 and V2. The quality of the V1 tube does make a difference, but my ears tell that the V3 tube may be the more crucial of the two in these amps. The stock Shuguang 12AX7 in V2 is fine

So, my specific recommendation for these amps is simple: get your hands on a 1980's production GE 5751. It will help bring out the clarity, soundstage and detail of each note. I've used these specific tubes in many amps for the same purpose and have gotten the same results. I've not used anything in the P.I. slot that consistently achieves these results.

Do not waste your money on a current production 5751 for V3. Every single one I have used/heard sounded woefully dull compared to the NOS variants (GE, Philips, Sylvania & RCA). Of them all - NOS and new production - nothing does P.I. service in these amps as well as the 1980's production GE 5751. Get them while you still can.
 

stormsedge

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I just had to have another tube amp (I didn't need another amp) and not having one tubed with EL84s, I ordered a 15w yesterday. Maybe the cream color will fit in with the living room decor...
 

mrloshaw

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I love my 15w stage right, just replaced the power tubes with JJ's and it's amazing, for the price it cannot be beat. I picked mine up for 60 Canadian loonies because the guy selling it said it was busted, well after one look I can tell it was just a blown tube so I purchased a couple new tubes and wam-o she works beautifully. a lot of people think because it's made in China that it's garbage, that's absolute nonsense, the only reason it's so inexpensive is because of the labour costs and if this exact amp was made in the states or anywhere in North America it would be five or six hundred dollars, I used to be a brand name snob but not anymore, I own Squier 50s classic Vibe telecaster and immediately before I picked up the Squire I played the $2,000 American professional and I liked the Squire better I was ready willing and able to pay two grand for the American but I just couldn't get past that it wasn't as good as the Chinese made Squier so now when it comes to products I don't go by who makes it I go by how it feels how it sounds instead. In short, this is the best 15w tube amp for under $200 IMO
 

mrloshaw

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These generic Chinese Blues Junior clones are marketed in the UK as Sub Zero (previously Belcat), and here's a word of warning from someone who knows what they are doing...
https://www.ratvalveamps.com/subzero-tube-20r
Their cheapness may be costly-if you value your health. Personally I won't go near one; they're cheap for a reason.
I think the dangerous ones were the 1st batch they made with the controls on top, the newer o es with the inputs on the front are not dangerous like the previous or so I've heard
 

2fingers

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I love my 15w stage right, just replaced the power tubes with JJ's and it's amazing, for the price it cannot be beat.


Mine arrived Sept. 23rd and it came with all JJs - just in case any others would like to know what they seem to be putting in them now. One tube glows less bright than the others (V2 I think, but not sure - it's 2nd tube from the right when facing the back of the amp). Is this normal? Plus mine never sounded "harsh" to me - only got warmer as I played it the last couple of months. Now it's quite a bit TOO warm (DARK) for my liking. Sounds like a box of mud with the bass and mids rolled all the way off and the treble and tone all the way up. Gain and master volume are on "4" on the dial... What gives? I know there are some fixes/mods/swaps for these amps so I'm far from giving up on it. For context, I'm running my strat with old Hohner RP150G overwound single coils (no doubt some amount of the excess warmth could be attributed to this).
 




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