The QLP-Series amplifiers are digital four-channel amplifiers with power factor correction technology. All QLP models have a very high-efficient switch mode power supply, which ensures best and stable performance even at full power. Our digital amplifier technology, together with the use of best selected electronic components allows the 2 Ohm use of all four channels at same time with a maximum power of 4 x 5000 watts, packed in a lightweight and compact size of 1U. The QLP-Series is equipped with a switch on the back panel to adjust the Input gain to 29d8, 32dB, 38d8 and 41d8 to match with other devises. Four SPEAKON outputs are mounted at the rear side. The SPEAKON connector of the output channel A (1+/1-) is connected with all four poles and offers the output signal of channel Bat the pins 2 (+/-). Channel C +D is equipped with the same wiring. This four-pole connection makes it easy to connect a Sub / Sat system with one cable only. The QLP-Series can be switched into stereo, mono and bridge mode. In mono mode the input signal from channel Ais linked to the output channel A + B, and input Cis linked to output C + D. In bridget mode the connection is 1+/2- on output A and output C. The Clip limiter can be switched On/Off on all channels .