The Digital Drive Processor, DDP™, is an exchangeable signal processing device, which is complementary to the Alcons ALC controller-amplifiers. The device offers a range of speaker-specific processing and controlling options, enabling the ALC to optimally drive the Alcons speaker systems. Emphasizing Alcons’ “system synergy” philosophy, the DDP module with powerful 56 bit, 120 Mips DSP engine has been designed to offer intuitive control and utmost reliability while preserving the sonic excellence of Alcons’ pro-ribbon based sound systems. The SDP™ circuit of the ALC can be seen as the “brain” of the amplifier; Activating the DDP converts the ALC from a “standard” stereo power-amp into a dedicated amplified loudspeaker controller. The analog (single channel) SDP modules or the digital (dual channel) DDP module can be placed into the SDP slots, located in the front of the ALC.