Zenith DP 306 Speaker Processor, The DP 306 provides the tools that ensure sound professionals and audio contractors obtain the maximum clarity for tours and installs.Although the unit is loaded with functions and features, it is easy to set up and use. Within minutes, your system will sound like it was tuned by a professional.Featuring three inputs and six outputs the DP306 also has a five band parametric equalizer for each output. The unit's output section includes a high performance limiter per output, compressor, phase and delay. Also included are variable high and low pass filters, with a choice of -6 db/Oct to -48db/Oct and Butterworth, Bessel or Linkwitz-Riley responses. Independent control of each high and low pass filter allows asymmetric crossover bands to be created. The unit can also be controlled from a PC via a RS232 connection.