sentences:  While the SVT could be used with any 300 watt, 2- or 4-ohm cabinet combination, Ampeg recommended that it be used with a pair of sealed 8x10" speaker enclosures because one cabinet could not handle the power of the SVT.It wasn't until 1980 that the speakers in the enclosures were updated to a power handling rating of 350 watts, allowing a player to use an SVT head with only one cabinet!SVT originally stood for "Super Vacuum Tube", but Ampeg has since revised the meaning of the acronym to "Super Valve Technology", with the word "valve" referring to the vacuum tubes (called "valves" in Britain and some other regions) used in the amp.