Yes, it's the bass that people hear far more than anything else. I know because I can hear my neighbors bass and not much else. If you can't afford the additional dry wall, one way is to hang heavy rugs directly behind your speakers. You can get creative with that and it can end up looking nice. They don't have to be that big to do the job.
Next step up is to invest in some sound paneling and bass traps.
All the best,
Nonoise
Next step up is to invest in some sound paneling and bass traps.
All the best,
Nonoise