Can anyone give me a comparison between these two pickups ? [ Underwood and Rev Solo ]
I bought the Underwood many years ago and tried it on all five Basses I have had over the years.
On all of the Basses, I've found that the Underwood has so much midrange that I don't have enough EQ on my amp to bring it down to acceptable levels.
Don, I think this may be kind of repeating what I said on another post earlier this evening.
But FWIW, not having tried an Underwood on my bass, but having heard them on other DBs, I think as a very gross generalization, to me the RS sounds more natural and woodier. I have fit four RS's on the same bridge (long story, won't go into it here). But IME, with the 'R' brand symbol up, you get more midrange and more string. With the 'R' symbol facing the table, you get a sound that's a little less 'hyped' and more subdued, but fuller, warmer, w/ more body, and still plenty of string. That's how I have it set up currently, facing the table. Not peaky or mid-rangey in a bad way at all. It's all there, again IMO/IME, with my bass, my ears, my tastes, et al.
BTW, I run the EQ flat on my main amp, a Euphonic Audio Wizzy combo. Just plug the Solo straight in, no preamp (unless I am blending it w/ a mic).
Not everyone has the same level of success with the RS (or any other) p/u. But especially factoring in the price and the ability to take it on and off the bass, the RS has worked out excellent in my case.