I have a Kala P bass with these on it.
Yes, they are really the only ones you want to get.
They are great
They sound absolutely amazing.
A couple things to note…
- they take forever to settle in, they are rubber after all you have to retune a lot for a long time. In this case, you do need to pre-stretch these a lot BEFORE you put them on. They literally wont fit and you will struggle trying to get them on. Enjoy the workout
- there is an odd little snap/snip sound when you pluck from the surface tension of the string, it bothers some people, just know its ok. Some suggest putting resin etc on your fingers, I think its a little much, its part of the sound.
You really get a wonderfully warm, upright thud.
Here’s a cover I did with them.