__Class D power amplifier__ - Electronically protected - Ultra-high efficiency - DSP on-board to drive all K-array products - eDSP management software - Top quality components for outstanding performance Aluminum frame The K-array KA line of power amplifiers are built into a 2U, half-rack, light weight aluminum chassis. Each model is comprised of two or four output channels providing up to eight channels in a standard 2U rack space when mounted together.