Kraft has a duration of approximately 25 minutes and is composed in two numbered movements. It was composed between 1983 and 1985. Lindberg described the electronic elements of the piece in the score program notes, writing: He added, "The control of amplification and spatialization of the soloists during the performance is done with an application written in PreFORM and running on a Macintosh computer allowing a precise control of movement in the hall in real time."
Kraft has been highly praised by music critics. Reviewing the New York City premiere, Anthony Tommasini of The New York Times called it "a sound barrage for large orchestra" and wrote, "Though Kraft bustles with heady, impish music, it is a brilliant, serious-minded contemporary work." Tommasini continued, "Kraft begins with spasms of thick chords that slowly disintegrate, until only scraggly lines for cello and clarinet are audible. The piece evolves in blocks of sound and constantly changing episodes. At one point there is a kind of fractured chorale, full of brassy slides and swelling strings. At another, the music erupts in slashing bursts that dissolve into gentle gong tones coming from all around the hall, almost like pagoda music." He added, "Though Mr. Lindberg devised the rhythmic relationships in Kraft through mathematical formulas, I could believe that he had written the piece intuitively, since it comes across as spontaneous and keeps you wondering what will happen next." Nick Kimberley of The Observer also praised the work, observing, "Its circus aspects at all times served the musical logic. The initial sonic cataclysm splinters into tiny, often barely audible fragments that Lindberg then reassembles. A bridging episode for flutes and percussion radiates stillness before Lindberg fashions a final cathartic explosion." Ivan Hewett of BBC Music Magazine similarly opined, "Magnus Lindberg is a composer who likes extremes. Whenever his music visits the middle range of gesture and dynamic, you can be pretty sure that it’s only a stage on some compelling journey to the outer regions, either of high, whispering delicacy, or of growling, brass- and gong-coloured tumult. His idiom is revealed at its most persuasive in his orchestral piece Kraft." The music critic Andrew Clements remarked, "With explosive gestures, vivid sonorities and a huge battery of percussion arrayed around the auditorium, Kraft still packs a powerful punch, though now it appears more generalised and less discriminating in its harmonic organisation than later Lindberg." However, Arnold Whittall of Gramophone gave the work only lukewarm marks, saying, "...despite the bravura of the confrontations it contrives between the orchestra and a team of clarinet, cello, piano and percussion soloists, the effect remains unashamedly earth-bound: sometimes dense to the point of congestion, other times highly fragmented, but not quite coming into focus in the way the more regular rhythmic patterns and rooted harmonic processes of the later works make possible."
