Line6 JM4 Looper Pros and cons.
There are 5 issues.
1. it's looper with multi Effector. Which is good obviously.
2.3. LA Session Jam tracks and real drum : this is biggest strength of this looper. and even you can change the tempo! However, it changes the pitch. which is cons.
4. You can not use Mic/ guitar at the same time. you should use only one source at a time.
5. Power source : it's AC 9V. You should carry heavy AC adaptor to use it.

The LA session Jam track/ drums was the reason why I got this pedal. It is useful but it's turned out that it's not that super fancy for me.

JM4 has much more details that you can control. which is good. However, there's limit always and it makes user confused.

Still, it's very useful looper, so check the video and leave any comment.
Thanks for watching.

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