The original power platform behind most high-powered British guitar stacks from the '60s onward. Output is generally between 20 and 25 atts, with pronounced midrange punch, tight low end and crisp top end that breaks up relatively smoothly and gets a little crunchy when pushed hard. It provides a great voice that stands out in a band mix as the mids tend to power their way through an overall mix. Big brother to the EL84