...so EMG claims there's a thing called 'insertion loss' or somesuch, which means that when two signals of similar amplitude are mixed, an overall drop in amplitude occurs. I think they're just trying to sell me a new blend pot, but nonetheless, I HAVE a fairly major problem on one of my basses. The bass is a Traben, and I've converted her to passive (no disrespect to all you active types, but I can't stand that stuff), and when I switch both pickups on at once (via a Gibson-style 3-position toggle) - the output, and tone, drops to basically nothing. She's mounting a Rockfield J and MM, and I have no idea what's going on or how to fix it. Both pickups are humbuckers, both are still wired in their factory config. I've tried coil-tapping the MM, but that didn't help at all. The only other controls (that matter) are a master volume and a master tone. The only thing I've found that might help is the Villex booster, but it seems too good to be true: From the Villex Website - www.villex.com "Gain equalization for multiple pickups Villex boosters automatically raise gain levels for two pickup selector positions, such as positions 2 and 4 on a Stratocaster, to make them level with one pickup selector positions. This improves the sound of the positions 2 and 4, making them sound as loud as positions 1, 3 and 5. Since positions 2 and 4 have humbucking properties, they can be used in a high electromagnetic hum environment." I have no idea how this could be possible, and I'm fairly good with electronics, but there it is. If you've experienced this, let me know how you dealt with it - or even if you haven't, let me know how you would! Solutions that don't involve buying things are preferred, but I'll do what I have to do. Thanks!