1> 4-channel balanced input and 8-channel balanced output 2> 24-bit,48kHz sampling rate,- AD/DA convertor,32 bits DSP chip. 3> input processing includes Gain, Mute, Noise gate,high-cut,low-cut,8 parameter EQ,Phase ,Delay and so on 4> output processing includes crossover,5 parameter EQ, Gain, Mute, compressor/Limiter, Phase, Delay and so on 5> Every input and output can do matrix assign flexibly Adjustable PEQ frequency, Gain and bandwidth; we can choose style:PEAKH-SHELVEL-SHELVE 6> We can choose the style of all High-cut ,Low-cut filter and Distributor unit: ButterworthLinkwitz-7> RileyBessel; Choice slope is from -6dB/Oct to -48dB/Oct 8> Adjustable compressor/limiter threshold, ratio, attached time and release time 9> Adjustable threshold, attached time ,release time of all noise gate 10> All delay module's delay time can reach over 682ms 11> Parameter setting of every channel can copy freely 12> Inter-put signal generator, output can choose pink noise , white noise,20Hz-20kHz adjustable sine wave and adjustable signal range 13>2*20 word LCD, light and key-press incorporate design, unique one key-press process method, bring the users with convenient and rapid operating 14> 32 user preset; status and every preset can save and adjust separately, with code protecting function 15>with PC ,we can do remote control by USB and RS232 connector 16> 256 units linkable by RS485 ,and do remote link controlling by center-control equipment