Line 6 JM4 Looper
Line 6 JM4 Looper

JM4 Looper, Looper from Line 6 in the Stompboxes Modeler series.

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All user reviews for the Line 6 JM4 Looper

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Average Score:4.0( 4/5 based on 18 reviews )
 8 reviews44 %
 3 reviews17 %
 2 reviews11 %
 2 reviews11 %
 2 reviews11 %
Audience: Beginners Value For Money : Excellent
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moosers's review

Line 6 JM4 Looper
The Line 6 JM4 is a loop and delay foot pedal that is designed for use with any electronic instrument, and also has the capability to be used with a microphone.  Since the pedal has an XLR input for a microphone you can use it for singing and do some pretty awesome overall.  In addition to the XLR input, it also has a variety of 1/4 inch connections for inputs and outputs.  It is a digital pedal that isn't rackable because it is a foot pedal.


Using the Line 6 JM4 for its basic features isn't too hard at all, but diving deeper will take some time simply because there is so much that you can do with this pedal.  For starters, you have the parameters to control your tone including knobs for amp modeling, drive, bass, mid, treble, as well as effects like chorus, flanger, phaser, and tremolo and different types of delays like tape echo and sweep echo, which are two of my favorite modes found on the Line 6 DL4 delay pedal.  In addition to these tone parameters, you then have all of the controls for recording and looping your sounds, which are in digital form and can take some time to understand everything that it going on, but is fairly simply to do basic recording and looping.  The manual is helpful and is definitely worth having around if you are trying to learn everything about this pedal.


The sound quality of the Line 6 JM4 is pretty good overall.  While it does sound good in terms of the recording and the playback as it won't color the tone too much other than how you set the parameters, the effects sounds like they are digitally processed, which of course they are.  They aren't all that realistic, so I tend not to use them that much because I have other pedals that I can use if I want other effects, so I really only use this pedal for looping, recording, and storing.


If you are someone who loves to loop things and play around by playing over things you have prerecorded, this pedal is for you.  The price is reasonable as it is about the same price of the other pedals in this line.  While you get a taste of the looper on the DL4, this pedal has infinitely more capabilities in terms of the time that you can record and the amount of information that you can store.  I love having the capability to record all of my ideas and play off of them within a single pedal as I find it great for coming up with ideas.  While there are a bunch of similar types of pedals out there, the Line 6 JM4 is put together well and I would definitely recommend checking it out along with some of the other loopers out there on the market like the ones made by Digitech and Boss.

nicodx's review (This content has been automatically translated from French)" Excellent machine for fun and work!"

Line 6 JM4 Looper
Looper pedal with digital effects and SD Card. You can create the loop, or work pieces by loading backing-tracks, and even impress their friends by playing these songs with the accompaniment plays itself.

- A damn good looper and almost unlimited because you can use an SD Card.
- The amp simulation: Clean, Crunch, etc..
- Delays with tap tempo, Phaser, etc..
- An efficient compressor.
- A separate reverb.

+ A box with integrated rate
+ Pieces on which to improvise (but useless in my opinion.

- Guitar,
- Microphone with XLR input,
- Auxiliary.


The setup is fairly simple, but it's still a looper with effects, therefore, must spend some time on the manual is very well done.


Effects are sufficient at this level (this is not a multi-purpose either!)
The separate reverb is appreciable.
The compressor works well.
The amp sims are good but I'm not a fan. I prefer my Roland Cube simulation.

I use it with a Fender American Standard Telecaster and everything connected to my live stereo or headphones.

Sounds nickel!


I use it for 3 months and I am delighted. This is a very good camera in my opinion but a bit expensive new.

I have a problem: the headphone jack is a little jaded so robustness issue, it is a bit mean.

In addition, general way, it is for use at home, but for the stage, a specialized looper seems more appropriate (as you put too many effects, the sound is a little distorted therefore found not top: ().

Otherwise, for the rest not worry. And gained occas, I do it again this choice without hesitation!

guitar.bruno's review (This content has been automatically translated from French)" Satisfactory"

Line 6 JM4 Looper

Effects are those of colleagues and other Floor Pod Pod 2.0, no compressor against.



It's pretty simple, the primary goal being the repetition of loops or without addition or with preset rhythms.
Manual clear and Editions of affordable sounds and effects.



The use of effects and modeling is satisfactory with the bare minimum, there is a clean, crunch and distortion easily.

With Fender Tele and Gibson Flying V.



I've had it about 3 years.

The big problem is that the recurrent loop bugue sometimes it starts recording and the end can not hear anything! Repair method that I finally found is to do a factory reset to restore normal operation.

I have not found a solution or a firmware update to address this problem ...

ratsscabies's review (This content has been automatically translated from French)

Line 6 JM4 Looper
See below ...
Everything is for fun, equalizer, preset effect, beatbox, looper ...
There is no USB port!
Left-right output that can switch on 2 amps.
Material thought to play well at home or repet.
No internal lamp but anyway it is useless.


I plugged in and I played, nothing complicated if we already had multi-effects ...
The manual is only useful if you want to deepen the technology of the device otherwise used without manual entirely possible and super easy!
Potentiometers on the front are convenient and simple, just what you need.
The drum part is super convenient to train in tones and solos, JM4 not used to it?
In addition to the tone is indicated on the screen.
The knob, amp model, you can change the type of sound, light (very) saturated, very convenient.
Only problem, is not controllable foot is better to use the hands up to the settings.
The material is made to train at home and it is perfect ...


Then I do not understand the guitarists friends below?
The sound effects and great, we get to slap sounds way to strat sounds very metal until slaughter saturations extreme!
The clear sound effects are realistic and large enough to have fun as it should be.
I first tested with a guitar Brian may signature Trisonic three single coil pickups and I found in the preset sound quality may brian CD ...
Plugged into an amplified speaker, this way no addition effect on amplification except low-treble.
The sound is very clean.
I think to play the guitar, you must keep it simple without too much thing to add ...


I use it for 2 hours, I have not done all the way around the camera, but the whole.
I had all the gear a guitarist can have in his life almost, that is saying a lot!
I think it's still expensive (nine), but in life everything is expensive!
Fortunately there are nice guys and serious on the net that sell occas at good price!
I am happy with my purchase, against your instincts and do not listen to others, and this applies to everything, not only in music!
A small bemol for manufacturing quality made in china at the buttons, but we'll see in time ...
Small problem also for the social life, when you push the sound back, we no longer hear Mrs. say 'at the table!' and that mouth!

Countdown's review (This content has been automatically translated from French)

Line 6 JM4 Looper
Looper / Sampler Line 6 ...

All features have been described Samho not in the "News"!

Otherwise, I leave an opinion because I decided to give one to each device that I had or still have, to contribute to life on the forum!
Indeed, I was lucky to find several opinions on the same product when I registered knew AF! End of parenthesis!


The manual is very well done.
Take your time and read it correctly, because everything is not as intuitive as it ... even if it comes soon! Do not hesitate to tweak, you learn faster ...

Personally, I use it in 3 ways:

-When I go on holiday somewhere! A skyscraper, JM4 and headphone ... it's still better than Amplug Vox. And frankly, it's fun on the balcony of a chalet in the Alps at midnight with a good lather! Uh, HS, sorry!

To-work plans and solos on presets "artists" ... or mine or those of the other guitarists of the band!

-And to save "quickly" an idea that might fly ...

I do not hide at home, rather than to light a lamp for 30 mins, I use the JM4. It is permanently connected to a power amp Marshall VS8008, and all in a 2x12! Work for a while, it's still enough ... we must stop to tell it!


So SOUND! It is a means, it's true!

There, or Me, I'm very dissatisfied, it's more in terms of effects.
They are very average, and more, it is very difficult to adjust them properly!
But hey, this is not a true multi Fx anyway! Nevertheless, these painful, especially in clean / chorus for me.

Then, other reviews have come down squarely JM4, in terms of sound quality. What I would like to say is that if in this box, there was an AC30, a Dual Rectifier and a Hot Rod, we would know! Or ...

Where is the best sound quality, it is low volume (well, low / medium what!) ... Especially for distortion. A high volume, distortion transo are some limitations, it is true, and you can feel it with this unit! It's messy, it lacks fullness.
Of bass better than the treble. That's what I felt especially through headphones. Otherwise, in my config Power Amp Marshall highs have more precision, and all except "pale".

While the sound is quite synthetic in general, this distortion is that the device gets the best out of the game ..
Crunches are means, they lack the thick, heavy sound of this, and the cleans are rather flat, almost "lifeless" ... what the purists Fenderien panic!

But ... all the rest means and this unit still has the average (10 or 11 out of 20, not more) and not 4 or 6 of 20 as we noted other AFiens! Well, that's their choice. I think their expectations and hopes were such that the disappointment has taken over!

At first, it is not easy to make a perfect loop input. We will resume several times, but we must insist! And after, with the usual manages to make a loop almost "perfect" ... and that runs well.

It can speed up or slow down the presets for some artists ... If it goes too fast, it can be useful. The small downside to this is that the tone will change also. For example, for a preset in MI, if you descedez fèrieure in speed, you will spend in Eb, and so on! Well, it's not bad ... it work a little differently and on other area of ​​the handle ...

Presets some tracks (ACDC, Police, Metallica, etc ... are not so bad I think. This is my personal opinion, contrary to an opinion that it is to puke!

A small flat also for the level of output volume of the instrument!
On some presets artists, it appears too low and you have to change settings (amp simulation).


This device is intended solely for domestic use, as I describe in the "use"!
If some people expected a great product for live and / or the studio, he missed! Hence, some of their dissatisfaction that I can finally understand! Live, we see mostly the JamMan. Ultimately, we must not mistake the device when it was acquired.
Personally it suits me fine because I was expecting this kind of product, knowing what I was going I do!

To return to home use, it will be used for beginners and scratch "means good," to work ranges, plans and other licks, on sound presets artists (and even on their own), an idea to record output like that! This device is intended for that, guys ... to progress while at home alone, with headphones or an amp!

Zique good at all ...
Fabien M05/23/2012

Fabien M's review (This content has been automatically translated from French)" BETTER THAN WHAT IS SAID"

Line 6 JM4 Looper
I will pass on what has been said before.


Contrary to what is said below, you can obviously get rid of the count (they are still not mad at Line6), just 3 minutes to hack the device to understand (or read the manual!).

It works like any looper, it is accurate, easy and offers the advantage of either the sampler or the guitar mic which is great for use vocals / guitar (a pr button to switch between the other)

In addition we can separately equalizer singing and guitar ... which is great too!


For quality sound, it makes the case pr of small live (pub) but it will never be worth heads tube amp!
I personally played the acoustic Gratt and I never used the distortion.
And contrary to what is said, too, can have the pure sound of Gratt bypassing the amp simulations.


It is a small bracket that makes his job for a fair price.
Very beefy must throw a building to break it.
And with samples of its banks and it's fun, for work at home.
The looper function is perfect, and the micro switch vocals / guitar is unique and welcome!

Shakyamuni's review (This content has been automatically translated from French)"Unfortunately, a pedal that combines the defects"

Line 6 JM4 Looper
We almost made the rounds of the unit, but I have a summary for those too lazy to look,
basically we have a loop pedal, ie they register, and you can play over our sample, we also simulated amps, way to clean a large distortion through the overdrive, for a total of 12 presets, effects were tremolo / chorus / phaser we can not use one at a time that may have a double echo (3 different) and reverb. Finally there are settings pre-recorded songs known (hey joe of master of puppets), and pre-recorded drum tracks to be accompanied.
Finally we have an auxiliary input, a headphone, mp3 input, microphone input, 2 stereo outputs, and of course a guitar input and an output amplifier.
And to top it off you can put an SD card to transfer loops on computer.
On paper it seems perfect for just 300 euros, seeing all this I thought "Great! With that I could do it all", especially since I bought used 'for 170 euros, but soon we realize that this pedal is a compilation of faults, I write so that "chronic" to open the eyes of those who thought like me at the beginning and they do not make the same mistake.


The configuration is fairly simple to choose the settings you should just turn the knobs, we choose between the clean amp settings, and distortion with a palette of 12 settings (5 or 6 would have sufficed), we selected our belongings, the sampler Battery and it registers accompanied, in short all is well. I had no manual, and I am very much out, everything is very intuitive (at worst on the site of line 6 can be found the record).
From that moment things that spoil ... For those who have enjoyed using this pedal in concert, I wish them good luck. While it can remove the battery from the demo, when you press Reccords was a small déompte 4,3,2,1 and recording starts, and although the countdown, it will make you chi * r to the end of your life! I do not know if it is I who am no one, but I have not found a way to remove it, basically if you want to use it live anticipate it will take a few seconds before the start of your loop does not start before or after recording began. Me my trick was to sample the "fast punk rocker" which is where the count is the shortest, with that recording starts 1 second after it was pressed on the pedal, which is still amazing ! And to stop the loop is not better, as it saves one sees the tempo which runs 1,2,3,4,1,2,3,4 ... and when you press again on the pedal to signal the end of the loop, the loop will wait to be on the 4 to stop recording, basically when you press to end your loop if you're not on the four at this time there, he'll have to wait one second to return the timer on the 4 and the recording ends. I do not know if you understand, but the trick is that you surgical precision for the perfect loop with the beginning and the end that is not cut or extended.
I still remember that the principle of the loop is "lean it saves you r'appuies it finished recording" it looks like ben line 6 know how to do that.
That said it is not necessarily a pedal for live, I will admit, but the studio is even worse!


And continue on the most negative point of this pedal, the sound. It's bad, but bad! At first I thought I had a rotten one because I had bought second-hand ', or because the power supply' was too low, but no, this is the normal sound that I hear. Just the bybass, at home when you are bybass is as if there was no pedal, it has a natural sound, in line 6 is not the same, it was a rotten one. I use a Marshall amp that illuminates a round, warm, and with this pedal is a coming out of the abject. So we try to find a setting among those we offer the pedal to have a nice sound, but do not try, there is none. The clean is bad, it looks like we listen to someone playing in another room, the crunch is simply awful, and distos are terribly rough, the sound sounds totally electronic, it's not natural at all, that we play with a harley benton 50 euros or a gibson les paul 70 'is the same. There are some nice presets and quite faithful to the original version, but the others are throwing up (another brick in the wall, hey joe, back in black ...) the guys who made the "preset" they at least listened to the songs before. The only thing I really liked his level is the sweep echo, but why just buy a line 6 echo pedal, it costs two times cheaper and it has good sound.
Otherwise the quality of the recordings of pieces of battery is good, then I have not much to complain, and you can adjust the speed of the song.

If you have the hope that the SD card recording are good and you can make edits to your own songs, it's not worth it, the sound is fake and if you enjoy to overlay multiple tracks is downright draft, when you improvise a solo you hear not the rhythm, and if you try to mount the rhythm track will be muted solo on the computer, in short, level studio is dead also.


Well even if the sound is poor, and the indomitable loop, there is still an advantage (though) is that it is an object which is quite portable and comes in handy if you go to a place or there is no amp, stupid example, this summer for vacation I could take my guitar, and this pedal in my suitcase without my amp of course, and I could play with headphones or small baffles simple though I preferred to play unpluged ... I am very happy to have paid Moitiers price, and I'll sell it as quickly as possible to catch the blow. I recommend this pedal for those who think playing with a live (rather take the jam man, I have not tried, but the comments are quite positive), and even in the studio for that matter. Basically this pedal is good for beginners, the guys who do not have amps or who want to improvise little things in their room, but then do not buy it new! opportunity 'is enough, and even a pod in line 6 is 3 times smaller, it fits in your pocket, it cost 100 euros, you can plug it into his computer, and with audacity you have the equivalent of a loop, so I see no reason to buy the JM4?!
As a final point, do not connect, oh, ever it low! The looper's not even detected, and the instrument loses its energy.
So here I am not averse to get rid of this thing after spending a year with her, and if it again ... I would have taken something else, anything but that!

andresch's review (This content has been automatically translated from French)" Did not suit me at all!"

Line 6 JM4 Looper
Swiss Army knife, but that does nothing really well, just good!
Looper effect (for which I had purchased)! But we can only use one loop and we can not change the loop without stopping the function of looper looper?? :-(

The amp simulation and effects are super bad for me

I put 5 because for the price it's perhaps not bad for a beginner, but for me who had bought it for the looper, it is not great.

As against the backing track to jam over prerecorded very well!


All this means


Rubbish is the great weakness


I quickly sold.

I went to the DigiTech JamMan stereo, there is no amp simulation, or effects, no backing track, but it looper nickel!

Well, no I probably would do no choice Line6!

Freemax's review (This content has been automatically translated from French)" The box was fun!"

Line 6 JM4 Looper
Everything is already said


A boy of 8 years would arrive safely in less than an hour.


For me, the hair!
I'm not a pro, so I agree a pod XT Live or X3 is more successful at this level but my JM4 enough for me. At the top


this toy! LINE 6 BRAVO!

I sell mine, not because I do not want it but because I need money to buy a Pod Studio KB37 ... what you notice are uses completely different ... hence the great regret ... but I do not know what else to sell to recover funds without farting my life budgets.

Go have a look at my ad, there's lil 'more significant to begin with full equipped

kesan-de-kas's review (This content has been automatically translated from French)

Line 6 JM4 Looper
In terms of pure characteristics is simply excellent:
A good idea to combine a looper and a multi-purpose simulator, amp etc.. work at home for what could be better? you plug this thing and just magic!
It's really very complete and we expect something excellent: adjustable microphone input, auxiliary input for an audio source, an instrument more (bass, keyboard, second guitar) and a main entrance dedicated to the guitar. MP3 input, headphone amplifier, stereo etc..
Brief foot.

Still flat the footswitches are plastic ... so that the case inspires confidence .. I had an X3 live recently. One of the plastic footswitch broke ... It's a pedal off for serious if we do a lot of scenes, rehearsals etc. ..


Overall, it's not complicated to use.
The downside for me is setting effects remains limited. The manual is quite clear.

THE looper does what you ask is well ...

The ergonomics are just right.


Where the expectations soar ...
The pre-recorded tracks are all excellent simpele to play along. Quality recording studio! brilliant!
we say: I'll have fun hua with that, too nice ..
Yes, but then, what disappointments!

The quality of the bypass is more than mediocre, it's absolutely terrible! My stratocaster loses its glitter, its clarity. The sound is not at all energetic and alive! it sounds like cardboard ... never mind ... humpf try the amp simulations ...

Ouch ... It still lacks treble, the sound is synthetic, it does not sing .. Phew big disappointment. The dynamic is absolutely nonexistent. Yet I have owned a X3 still sounded much much better.

The effects are just horrible .. it simplemtn the carnage! metal to perfection, never natural cherry is that we can not even "catch up" since they are not really customizable.

Play along the tracks pre-recorded studio quality quickly becomes very discouraging.
After I tried it with a Start with a Gibson SG, saying it would be better. Naive.

I tried to finish with a bass: Warwick Fortress One. Although there are not even count. The looper does not know the frequencies below a 100 hertz. result you can always push the bass on the preamp in the bass, you'll never ... I even tried to connect a SansAmp Para Driver to catch everything. Same result for the bass. Only for the guitar that it gets better slightly.

The character known to growl Warwicks no longer exists. The amp models are not dedicated to bass, he can not get better than its cardboard worthy of a multi-purpose unnamed 30 euro bought second hand.

It's absolutely disappointing


If you like the sound of your instrument, especially do not buy this "thing". So attractive at first, yet it is the worst purchase I have done in music.

There are only recorded tracks that are great. all the money in development of the pedal is spent in studio recording sessions with artists ... we pay a high price for the toy.

If you can test it, go ahead, you'll be disappointed, but do not buy. Watch more on the side of Boss and Digitech. These two brands are certainly not pre-registered pattern excellent but it does not sound like puff the fact that JM4.
I never redeem a looper designed by line6 .. almost 300 euros in the trash, what am I stupid!