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A Power duo is a two-piece rock band that follows a similar blues rock style to a traditional power trio, and whose primary lineup consists of a drummer and a guitarist (such as Two Gallants, The White Stripes, Pressione Su Malta, Winnebago Deal, The Like Young, The Black Keys, Local H, Japandroids, No Age, Wye Oak, The Dodos, Giant Drag, Blood Red Shoes, Jucifer, The Kills, and '68) or a drummer and a bassist (such as Om, godheadSilo, Death From Above 1979, Japanther, Lightning Bolt, Royal Blood and Twenty One Pilots). One Day As a Lion, Matt & Kim, and Mates of State are power duos featuring a keyboardist and a drummer without guitars or bass; Great Northern currently[when?] has a line-up consisting of a guitarist and keyboardist without bass or drums.
In the case of power duos that utilize only an electric guitar and drums, the lack of a bass guitar can be overcome in different ways: Jack White of The White Stripes and Joe Ziemba of The Like Young use octave dividers and pitch shifters, although most of these effects are monophonic and will not work on chords; The Black Keys often have a bassist when performing live; Scott Lucas of Local H installed one half of a split bass pickup under the lower strings of his guitar and running the signal from it to an octave pedal and a bass amplifier; guitarists Brian King of Japandroids and Randy Randall of No Age split the guitar signal between multiple guitar amps (generally one for clean and another for effects), and a bass amp; drummers Andy Stack of Wye Oak and Micah Calabrese of Giant Drag simultaneously play synthesizers to fill in the gap.
T.Rex/Tyrannosaurus Rex, from resuming playing electric material in April 1969 until the recruitment of full time bassist Steve Currie in November 1970, frequently played live as a power duo using various combinations of electric guitar/bass (Ride A White Swan, Elemental Child, Do You Remember?) electric guitar/bongos (By The Light Of A Magical Moon, Jewel, Summertime Blues) and even keyboards/bongos (Organ Blues).
In the early 1980s, the Serbian and former Yugoslav post-punk and alternative rock band Disciplina Kičme, founded in 1981 by Dušan Kojić "Koja", featured a power duo lineup of bass guitar and drums on its early releases. The band relocated to London in the early 1990s, adding a female Black British vocalist Gofie Bebe to the power duo lineup, and changing the name to Disciplin A Kitschme.