Its a 2600 watt PMPO Mini Hi Fi sound system. I think I bought it some 6-7 years back. Awesome sound, no distortion at high volumes and excellent build quality.

Its so well made that it never has failed in these years of hard use. And the current models are way better in terms of compatibility and performance. 

Entry level mini hifi systems i guess are pretty affordable too. But one buys a sony only because of its unmatched quality.