I Had been using very light gauge nickel wounds usually Dunlop or XL i.e. 40-100s or even 35-95s (I even went as low as 30-90 rotosounds funk masters ...but they were terrible and felt weird). Recently I decided to go 45-105 DB nickel wounds. took me a while to set up my truss rod and action and they still feel a bit heavy. What I'm really noticing though is the tone...much 'beefier' and thumpier than before. I'm playing a Sandberg California VS (P bass). Thisnk I'll up-gauge my mayones jabba, Mad up!, and just get used to playing heavier gauge strings...they sound better to my ears anyway.