however i have just read this in a review
Having these switches on the underside means the Nova has to use the supplied spikes (or alternatives) to allow for clearance. However, the clearance is tight and unless you have long, thin fingers, you might struggle to throw all three switches with the spikes in place. The Nova also features DC cancellation circuit, which rebalances the mains sine wave on the zero volts line, thus reducing transformer hum. This technology is usually found in the company’s Syncro power cable, or most recently in its new Syncro Uni box.
ah this refers to the new evo version !!