In terms of sound quality, of primary importance in the LASA concept is that, unlike a conventional class-D design, its level of distortion doesn't rise as the frequency increases (see my "Measurements" sidebar). The distortion level is also claimed to vary very smoothly with output power. Together, these factors mean that the character of the amplifier's sound should not change with different musical instruments and/or at different loudnesses. The C15 also features "soft clipping," said Reis: "even in the moments when the signal goes into clipping, the sound doesn't get aggressive or too bright and always remains in the balanced tonal character."