Four tracks of techno pressure from Spanish heavyweight Kwartz. Since 2011, Kwartz has been steadily building a renowned discography of powerful and rugged club cuts. The “Fast Focus” EP, his first appearance on Setaoc Mass’s label series SK_x. It is a prime example of this deep, dark and driving sound: from the peak-time grind of “Impulse” to the dank, atmospheric echoes of “Haram.”