I know that the Jazz Bass is known to have less bottom end than the Precision. It's so with my P and J Basses.
Never mind. I hadn't really played my Jazz in a few months. I took it to practice today and had plenty of bottom end. In fact, the band remarked that it sounded great. I don't know what I was thinking. With the band today, it really was great. Low but growly at the same time.
Really enjoyed playing it today.