This may seem like G&L sacrilege but I'm about to replace almost all of the electronics on my L2500 Tribute. The only stock electronics that will remain when I'm finished will be the pickups! I've been in the process of making my L2500 Tribute into the bass I want it to be. So far I've replaced the parallel/series switch with an outer coils/parallel/inner coils switch which really opened up the tonal palette for me. The final stroke will be installing the Audere 3ZB preamp I ordered today. When all is said and done I will have the following controls: volume/volume stack treble/bass stack midrange Z-mode switch (I can tell you more about this if you want) outer coils/parallel/inner coils switch 250hz/500hz/860hz midrange frequency switch The preamp will be an 18v system for greater headroom. Apparently, when the controls are set flat, what I'll get is a clearer version of how the bass sounds in passive mode. When the controls are flat nothing will be boosted, but because the only DC - AC point is where the preamp connects to the output jack. I'll let you know how things go, and post before/after sound clips.