The solo that I have is the photo, it's a small amplifier transistor 10, 15W I bought it about 10 years ago to play in the street. It can work with a set of batteries (LR20) or a 12v transformer but also a 12v motorcycle battery (handy in the street), there is a little bit of welding to be done to the tip and two clips connect the battery. It has an XLR microphone input and auxiliary input jack as well as, severe and acute correction and output out. No impact damage. It is a booster amplifier that connects an electro-acoustic guitar and a microphone.
Very solid design it strengthens his voice a little but do not expect miracles.
The corrections are effective, I personally favor the voice on the guitar

UTILIZATION

Simple configuration

SOUNDS

Should be to strengthen the voice, but no more.
Above all, do not plug a bass over the HP not resist.

OVERALL OPINION

I use it for 10 years, I am always,
Today I think I would buy something else
but it's all about price ...