JEEZ, After the opaque OP and the some sideways response s I was confused. Here's the jest of the OP. Any 2 p-ups sound good together. 3 or 4 don't. Lipsticks are low DC to start w. 4 in parallel are only a little more than 1 K ohms. There's your problem. I d recommend having different switches. Even if you don't want series, having 2 in series, in parallel w 2 others in series will have all 4 giving a signal. And the result gives the same frequency response curve as each p-up alone. So no thiness w a bigger, Fuller signal.