the ekadekatron. two fat lady vari mu limiting amplifiers. and a two 3 WAYS equalizers. 18 tubes total. goes like stink! adam (empire audio labs) reckons the eq is better and more effective than a pultec eqp1a. and the limiter amps are like a mothers love (?) but hey! enough with the similie. they have their own sound dimension believe me. please send a short sound file to test me.