cakes wrote:The bass is lacking a little... oomf.
this could mean many things, but I'm interpreting it as something in the low-end information. If you're referring to how the bass sounds in the overall mix, this could be as simple as carving some low or low-mids eq out of the guitar to give it a little more place in the sonic spectrum. Or could try finding the where the click and attack of the bass is and then notching it it out w/ a eq cut a bit - and then put in a compressor (possibly in parallel combined w/ original uncompressed signal).
But so so so much of how a bass sounds depends on how it's played, where it's played in relation to the bridge, as well as the bass itself and the pickups (and where they are on the body). If the P-bass is sounding more like what you all want, maybe see if your bandmate is open to that conversation?
cakes wrote:A good DI isn't really that expensive
Correct. If I can recommend a very good DI for passive bass, I've been hooked on the Radial JDI. If you want to save a couple bucks, the Radial Pro48 is also excellent minus a couple bells/whistles. There should be plenty of them available used for low-dough.
I don't use a ton of outboard compression on bass anymore but I think my overall favorite one that I've used so far for that application is probably the DBX 160A. Simple, straight forward control set. There may be better & w/ more features, but you're starting to run into real money quickly. Probably second favorite and a little more affordable would be the FMR RNC which also adds attack/release knobs.