Short version: I ordered Samarium Cobalt Noiseless pickups and wasn't ecstatic about how they sounded. I swapped my 250k pots and .047 cap for 500k pots and a .022 cap. It made an immense difference. If you hate your noiseless pickups, I would recommend trying this before writing them off. I decided to finally swap out the pickups in my Jazz bass, and I was set on the Fender '74 pickups, when I found a set of the old Samarium Cobalt Noiseless pickups for a really good price. I'm pretty sure the general consensus is that Fender's noiseless pickups usually aren't outstanding, but the Samariums were one of only a few sets that I had read even a single positive thing about. I figured for the price, the risk was worth it, so I ordered them. Once the pickups arrived and I put them in, I felt they were pretty bland. The pickups they replaced were the "Fender Designed" ones that came with my '77 Vintage Modified Jazz Bass, and I felt the stock pickups sounded better than the Samariums. I decided to keep playing them and hoped that I would come around and end up liking them. After a week or two, I was getting ready to pull out my wallet to buy a set of the '74s. Then it occurred to me that noiseless pickups are humbuckers, even though they're "voiced" to sound like single coils. I couldn't remember seeing anyone who said they hated noiseless pickups mentioning that they had swapped out their pots and caps at any point. I did a quick search, and lots of stuff came up about guitar pickups, but almost nothing related to noiseless bass pickups and changing the electronics. I ordered new pots and a new cap, wired everything up, plugged my bass in, and was really surprised with how much of a difference it made. The pickups definitely sound brighter, and how I would expect a Jazz Bass to sound. The difference is most noticeable with the E and A string, which before sounded muddy and dull. Overall, my bass now has that classic Jazz Bass growl that I was hoping for. I figured since I didn't remember seeing anything about changing the pots and cap when switching from single coil pickups to noiseless pickups, I'd share my results with everyone and hopefully help someone before they write their noiseless pickups off. Before all of this, my pots were CTS 250ks audio tapers for the volumes, a CTS 250k linear taper for the tone, and a .047 Orange Drop cap. I also ordered a .047 cap incase the sound was too bright after switching to 500k pots, but I don't think I'll need it.