I have a Bartolini AGB918-2 Adjustable Gain Buffer/Preamp (single channel) on order to boost my low output passive pickups and compensate for cable losses (I use long cables). Documentation recommends a 25k pot (I'd have to order one) for volume. I have on-hand a 50k pot that fits the bass. Research in these forums suggest it really doesn't matter, but never described any differences between one or the other. I figure there will be minimal tonal difference which I don't care about, but I could be wrong about that. Also figure volume rate of change will be quicker with the 50k pot which is fine with me. Any other differences I might expect by using the 50k pot instead of the recommended 25k? I contacted Bartolini regarding this just before I posted here. Just wanted to get some field experience from folks who regularly change onboard preamps of any type. I'll post Bartolini's response when I hear back.