Akai - Wikipedia, the free encyclopediaAkai manufactured and badged most of its imported hi-fi products with the Tensai brand
As you don't have your location filled in, I've no idea where you might be? - but I've heard nothing about Sony and Akai, Sony and Aiwa though is a different story.if it's made by Akai, then you might find an identical amp under an Akai model number, or a Sony model number. Sony now owns Akai, and their service website has the Akai service manuals on it.