The quintessential "in your face" styles belong to the Ketron SD1; this is due partly to a frequency response with a boost on the mid-frequencies (which is also responsible for a "nasal" coloration of the overall sound) and partly to the use of sampled loops (grooves) on the second drum channel. A similar sound is also found in other Ketron models, like the Midjay, the SD5, the XD9 and the old X1.