I've been wanting to do this for a while, and I've finally done it. Question though, how safe is it? It's a very good switch, rated for 240V @10A. The patch cord between the switch and the sub is low resistance copper audio wire. The plugs have been crimped and soldered. I'm assuming it is a bad idea to switch the sub off while it's receiving signal, and that if I keep it off while under high power it may harm it. Am I right?