This is the version marketed by Takamine as the tri-ax. This is indeed a LRBaggs M1, but has the advantage of having a switch that allows you to choose between active or passive mode. It has both a passive and an M1 M1 Active: no need to ask about which model to buy two . Passive mode offers two advantages: if the battery loose (it is given for 1000 hours, but hey ...), we can still use it: you just need to boost the input table. The other advantage of passive mode is that it can possibly involve the M1 with another collection system. The passive mode is better to attack a proper preamp-like Fishman blender or TubeCooler Taka ...

But the M1 replicated a sufficiently complete and its natural to be alone. This sound is a mix between an electret micro-issues in less feedback and a piezo-that "couacquerait" and not a very natural magnetic pickup.
The microphone picks up three types of sources: the vibration of the strings - upper-coil, the vibration of the guitar - in contact with the soundboard, and the inside of the body-coil-less. The microphone transmits fairly accurately the sound inside the body of the guitar, and even if you're having fun singing in the roses, for example.
Nothing to do with the magnetic pickups entry-level producing an acoustic sound vaguely and without that of an electric guitar. With M1, you really an effective and professionalism to make good sound stage.

In the studio, there is no substitute for great condenser microphones. But if we look a little folk's "electrified", it is certain that the M1 can be of great service. It may also prove to be a good addition to taking two sources.

The small addition to the magnetic technology is that it opens the door to sound closer to the electric guitar. Nothing prevents connecting the M1 on a guitar amp in addition to the sound. On an AC30 example, we get fantastic sounds quite reminiscent of the bass drum Rockabilly.

The value is most excellent: 160 euros, it is not even the price of a micro stage "average". And if you have several guitars, nothing easier than to remove one to put on another. Not even need to loosen the strings! Obviously, it is necessary to equip each of the guitars with the cable connected to a jack / belt clip.

I was extremely skeptical before I had the opportunity to try the M1: I never imagined that a magnetic pickup can produce a sound as full and natural. But this is the case ...

Lrbaggs Hats off!

EDIT 4 months later
I did two concerts with the microphone mounted on my GuildD55, amplified through a good "small" sound system (EV Q66 amplifier, EV SX300 speakers, table Soundcraft B200 series). I can only confirm all the good things about this mic: its very natural, very musical and obviously without the "quack" characteristic of the piezo pickup. No problems with feedback and feedback in spite of a high volume because I was playing in training "rock" (bass-drums-guitar crunch).
I was also able to listen to my guitar played in a group we then replaced on stage and I was amazed by the quality of the reproduced sound of my guitar: I found the sound feature of the D55 with virtually no change due to amplification.
I also confirm that the micro installs and withdraws quickly: just loosen two screws, remove the micro from the roses and pushing the strings slightly and then remove the mini-jack (that remains in the body of guitar). In less time than it takes to write, there is the original acoustic folk!
In my case, I found the perfect solution for my amplified acoustic guitar. I imagined that by buying it I might need it for adding a piezo sound really full. But it is totally unnecessary.

Re-lrbaggs Hats off!