Despite its ultra-compact size, the 4-channel line mixer Micromix MX400 is truly powerful! The MX400 offers the highest sound quality at all output levels compared to the competition and features low-noise 4580 operational amplifiers for outstanding audio performance - the same chips used in its much larger counterparts. The MX400's ability to enhance the capabilities of standard mixers is why it works its magic, for example, when used as a sub-mixer. If you run out of available channels on your "big" mixer and need to add 3 more keyboards to your mix, simply connect them to the MX400, select the mix - and connect the output of the MX400 to a single input on your main mixer. This is just one example of how the MX400 can add versatility to your current setup - imagine the possibilities!.