If your MG12 / 4 should be mounted 19-inch rack, simply return the sides of the console that make up the brackets.

Four microphone / line inputs and four stereo line inputs, two of which can be used as mono microphone inputs.

Six high-performance preamps to operate all types of dynamic or electrostatic microphones.

General switch provides power to the voltage of the six channels XLR mono microphone to use condenser microphones.

In addition to the main stereo bus, the MG12 / 4 bus has a stereo sub-group that allows for two additional outputs.

Each channel has 3-band EQ very musical. In addition, each entry has a single-pass filter HPF to remove any low frequencies.

UTILIZATION

Very easy to use.

SOUNDS

EQ too effective, use sparingly.

OVERALL OPINION

Overall, it's a good mixer to use with good powered speaker (type HK Audio, Mackie, etc ...) for a cover band doing the Café-Concert.
See MG16 / 4 also looking for a little more input.
Good quality / price ratio in the whole and more reliable than behringer.

Directions: http://www2.yamaha.co.jp/manual/pdf/pa/french/mixers/MG16_4F.pdf