The A-300 and the whole A series, as far as I know, were all strictly solid state. The Trinity series are hybrids with tube input and Hexfet outputs, running partly in Class A for the first few watts.
I had an A-100 and had Randy transform it into a Trinity 200 (200 watts into 8 ohms, 400 into 4). There is no "A" in the Trinity name.
I had an A-100 and had Randy transform it into a Trinity 200 (200 watts into 8 ohms, 400 into 4). There is no "A" in the Trinity name.