I have 2 single coil pickups in a bass of mine with an aguilar preamp. Now, the way I have the blend pot wired up is the same as the way aguilar suggests in their wiring diagrams. The only difference is I have no connection to ground on the blend itself. The sound is fantastic but in certain places I get buz. I can cope with it mostly, because it isn't overly loud. Now, when that earth connection is made from the blend pot, something wierd happens. The blend works in a funny way. There is no sound whatsoever in when the beldn is in the middle, ie, at the centre detent. Favouring one pickup slightly to get smoe sound results in basically soloing it. It's really wierd. On the up side, there is no noise at all tlike this, but yeah, i essentially have a pickup switch. Anyone know what might be going on here? I have tried many things like swapping the pase of one pickup, 2 volume pots, and a few more, but it's always the same.