I tried the RS2 on 3 different basses. None worked for me. Then I used a Full Circle. Definitely better. Then, I just got a new bass yesterday...an absolute beast of a bass. It sounds incredible unamped, but I put an old Underwood on there, through my EA Doubler....I have never been so happy with my sound! The Underwood sounds completely natural on THIS bass. I had it on a ply at the school I taught at....sounded quacky and horrible. I guess my new bass just likes this pickup. (BTW, using D'Addario pizz strings/med tension)
If any of you are interested, I got my new bass from a high-end builder over here in China. PM me and I'll tell you where and for how much. I won't say publicly, as this bass is distributed in the US by a well-respected shop, and their cost is over 3x what I paid, so in the interest of fairness, we can take it to PM. It is a fully carved bass with excellent figure, and a tightly-grained spruce top. TONS of sustain and growl.