RESOLVED!! Edit- Ok! The issue is resolved. I don't know exactly what the problem was. I looked in the control cavity and a few of the pieces of the copper shielding tape I put in were coming up and could possibly have been contacting other components. I don't know if that matters, but I didn't do the best shielding job and I think I might go back in with some glue a little later. Once I reassembled it (I had taken off the neck and bridge also) completely, it sounded great! I will possibly never know what really was wrong. Thanks TB. Feel free to close this thread now... I will be posting a NBD replete with pictures, sound clips, and maybe even a bit of video! Original post- Hey guys! So I just finished this build I've been doing for months and month and everything turned out spectacularly, except for one really weird problem. The bass doesn't really seem to have any lows and it's the brightest bass I've ever played. At first I blamed the strings, I had put brand new D'Addario NYXLs on it. But I swapped them out for 1+ year-old TI flats and it still sounds super aggressive and angry. The pickups are really high-quality vintage sounding pups that people usually use to get more classic tones. Every other aspect of the bass is amazing and it feels/plays like heaven. I just can't seem to figure out where my thump is! I've played hundreds of basses over the years and this one has got to be the most aggressive, least bassy bass that I've played yet. I'm open to the idea that I did something wrong. Let me know what you think.