1. Multifunction and Easy Control The mixer collects sounds from multiple sources (guitar, bass, and keyboard) for monitoring or routing. Each channel of the linear mixer features an independent volume control, with individual input jacks and volume knobs, as well as a single output for the amplifier. It blends multiple channels into one track, suitable for keyboards, small stage setups, drum kits, or submixes. 2. Simple Stereo/Mono Switch Mixed audio is split into channels. Input and output connections must use 1/4' TRS stereo audio plug cables (1/4' stereo audio plugtoplug cable; TRS cable is key) and then press the toggle switch. The mono version mixes 6 mono signal inputs into 1 mono output (input and output connections use 1/4' plugtoplug cables). Note: TRS cables are not included. 3. Low Noise The mini mixer delivers the sound quality at all output levels, operates with extremely low noise, and provides audio performance. from distortion and easy to set up, it is for quickly and effortlessly mixing 4line level signals. The 4channel mixer ensures the signal quality and integrity even at peak levels, making it ideal for multikeyboard rigs.