I'm thinking about saving up a little and buying a bass guitar.
One reason is just to learn the instrument and learn more about groove, I'm sure it will help with my guitar playing
So I was hoping our Bass Guitar guru Bogdan (and other bass players) could give a rundown on the different options around from Precision vs Jazz bass and the less traditional basses like Yamaha RBX etc, active vs passive , 4 string vs 5 string
Great to hear you'll be out in the market for bass! I think that playing bass guitar can give you a very fresh perspective and surely will also benefit your guitar playing.
Since this will be a first bass - I would suggest going for a nice 4 string bass that is versatile.
That being said, my best bang for the buck when it comes to (new) basses would be :
* Peavey Millennium 4 AC BXP
* Peavey Grind Bass
* Nice Jazz Bass type of bass, for example : Squier Classic Vibe Jazz Bass or some less known brand instrument that feels good
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All these are 4 string basses and first one up there features active electronics which helps squeeze some nice tone from a cheap instrument. All are relatively versatile basses (in comparison to Precision bass for example which is amazing in what is usually 1 tone it does) and should be all a very good choice in the price range. Now as with any instrument - you need to try out these in the store and to find a one that you like. When it comes to bass, look at the action (I personally like to be able to set it nice and low) and general build/feel + sound. You need to feel comfortable with the instrument in hands and like the sound of it and at this price range - quality can vary here and there.