Note9:
Qual volume of pedals + booster (prampli)
1Between jack + 1 output jack, running on AC or battery

UTILIZATION

Note10:
Trs easy to use, just that branch the instrument "in" and "out" on a sound system, etc. pc. more than that play the frquences go: 100, 200, 400, 800, 1.6K, 3.2k, 6.4k
Just enough, volume (booster) and switch (natural sound / sound quality.

SOUND QUALITY

Note 9.5:
Extremely effective for use as prampli electro-acoustic guitar, bass, violin piezo equipped with simple, this qual Whereas the sound swells and offers a wide range of sound.
I used 9.5 because I deprecated the use of batteries 9voltes because oddly in acute Beuz it gives a little ... And the transformer 9volts! I noticed that the transformer at its best silent 9volts the batteries, but it still persists a lightweight Beuz ...
So my advice to plug into a 12volt transformer!
I use it for 3 years on scne (quite often) and none in Beuz 12volts. So I would try to 10.

OVERALL OPINION

Note10:
Report qualitprix amazing, I recommend it, you will not be due (with a 12 volt transformer).