The item you are looking at is a Superb Amplifier, this is a Yamaha AVC-30 system with 4 Channel Drive Natural Surround.

It has all normal features on amps including Bass / Treble / Balance / Bass Extension but also has Natural Surround, Dolby Surround and Simulated sound processor.  

 The deck has 5 phono inputs and 3 record outputs so that will home all your standard decks including your ipod, xbox etc etc. Speakers need to rated at 6 ohms front and rear. 

The dimensions are as follows Length 43.5cm, Depth 32cm and Height 12.5cm, the unit is in good condition with only superficial marks. Power rating is 240volts / 50Hz / 550w