Professional 4-channel installation amplifier. Powerful class-D power amplifier with 4 x 120 W at 4 Ohm (transformer bypass) or 70V/100V outputs through toroidal core transformer. Stereo/parallel/bridge mode selector switch per channel pair. 4 balanced line inputs and 4 speaker outputs with terminal block connections. User-friendly front panel with signal, limit, protection, mute and bridge mode LEDs per channel and clipping LEDs for the inputs. Speaker protection circuits: DSP limiter, overcurrent, direct current, overheating, short circuit as well as switchable auto standby mode. DSP presets with HPF and LPF which can be activated via DIP switches. REMOTE audio and control bus based on CAN architecture (Controller Area Network). Equipped for future LD Systems remote control panels and paging microphones. Slot for future optional expansion cards for Ethernet or Ethernet + Dante.