This is a New Old Stock amplifier that has been sitting around for a while.  It has never been installed and is in the original box.  I don't know much about this model, but it is very similar to other builds of commercial music amplifiers from the 1990's.  It is pretty basic with two microphone channels and one program music channel.  The microphone channels include mute circuits to mute the program music channel.  Bass and Treble are adjusted on the back of the amplifier using a small screwdriver to adjust the trimpot behind the labeled hole.

This was not a cheap amplifier in the day - the knobs are anodized aluminum when most competing amplifiers had plastic knobs.  It was built when even small amplifiers were heavy, and this chassis is made from heavy gauge sheet metal and has big transformers.

This should work great for basic music and dynamic microphone applications in retail or restaurant industries where the total speaker load is 25 Watts or less.

If you have any questions about this amplifier or your application, please ask.  I have extensive experience working with commercial amplifiers and commercial sound system components.