AGI manufactures or has manufactured the following equipment (click to expand models list):Solid State Amplifiers
TAC (July 7, 2009): AGi was founded by Dave Spiegel. The company went out of business in the 80's.
James Burin(March 7, 2001): AGI only produced one product over a 14 year span and it was their 511 / 511A preamp. Many of the folks that were into audio way back when will remember this preamp as it was written about in most every "underground" audio mag along with glossies like Audio during that time frame. J. Peter Moncrieff stated "this is the only product made that has ever challenged the residual noise floor of our test equipment".