Medha D.J. Plus Sem-6 6 Channels Stereo Echo Mixer 6 Channels Stereo Echo Mixer. Digital Echo 20 - 400 m/s. Frequency 25 Hz - 25 KHz. Input Gain: - 50 dB to 6 dB gain range with overdrive indication. Output 0 dBm / 17 dBm (775mv / 5.5v) Equalization: Bass & Treble+ 5 dB. Controls: Gain, Eq., Pan, echo, Fader. Power Supply: AC 220V 50 Hz.