нашел только что вот такую интересную штуку...
вроде как понял стерео вход и 6 выходов
Specification
EQ-700 7-Band Parametric Equalizer ● 7-Band Parametric Equalizer: 63Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, 12kHz ● Boost/Cut: ±18dB ● Signal-to-noise Ratio: >90dB (IHF, A-weighting) ● Frequency Response: 20Hz~20kHz ( ±3dB) ● MAX. Output Voltage: 8V ● T. H. D.+N <0.05% ● Input Sensitivity: Adjustment 50mV~3V RMS ● Head Room: 20dB ● Input Impedance: 10k Ohms ● Output Impedance: 10k Ohms ● Power Requirement: 10.5~16V Negative Ground ● Unit Dimensions: 185×123×29.5mm
http://www.aksgroup.su/item_22223199.php#