Sure, it's important to have a high fidelity set of main studio monitors...but in today's world of people listening to music on bass-challenged ear buds and laptop speakers, occasionally referencing on a smaller system is crucial. The Avantone MixCubes are passive mini monitors, very similar in design to the classic Auratone 5C Sound Cubes, and are the perfect tool for this particular job. Grab a set for stereo, or just one for checking mono compatibility and finding the perfect spot for the lead vocal.