The unit has been updated to the latest version. It's very convenient because you can apply the equalizer separately to the preamp and power amp stages. Used condition. The EQ-200 is a 2-channel graphic equalizer with multi-step frequency settings and an easy-to-use digital display. - Model Name: EQ-200 - Type: Graphic Equalizer - Number of Channels: 2 channels - Connection Terminals: Input/Output terminals available - Display: Digital display - Operation Switches: ON/OFF, Memory button - Frequency Bands: Multi-step frequency settings Thank you for viewing.