Maybe saying the bass needs to be more prominent was too obtuse. Let me clarify:
I don't mean that the bass needs to be louder overall. I mean that it sounds like there's a high cut on the bass and a low cut on the guitar, and those cuts are far enough apart that they're creating a bit of a frequency chasm. I think the bass frequencies need to be butting up against the guitar a bit more.
Matt, I wasn't trying to be insulting by asking about the double tracking; I was just confirming.
I've listened on my home theater system (with subwoofer), Audio Technica M50s, and my studio monitors (M-Audio Bx5As, nothing incredibly impressive) and my impressions were consistent across all 3.
With this being a short clip, the stereo element was less of an issue, as a huge stereo field isn't always essential. So, there may be a wider range in other parts, or this could simply be your taste for how the stereo field should sound. That wouldn't be a deal breaker for me.
The gap between the guitar and bass is the bigger issue, in my opinion. When the bass is following the guitar like it is in this clip especially, the two need to almost (AAAAALLLLLMOOOST) sound like 1 instrument.