Play a slow bass line in a small room and some notes jump out while others almost vanish. That isn't your speakers. It's the room.
Bass bounces
Low notes are long waves. They bounce between your walls, floor, and ceiling, and at a few notes the bounces pile up. Those notes get louder where you sit.
Why small rooms have it worst
In a small room, those notes land right in the range of kick drums and bass guitars. A big room pushes them lower, where you hear them less.
Moving helps a little
Moving your chair or your monitors a few inches changes which notes pile up. It's worth trying, but it rarely makes the boom go away.
Turn down just that note
Unboom finds the note your room exaggerates and gently turns just that part down. It never boosts anything. Try the free room bass test to hear it for yourself.
FAQ
Are my monitors broken if the bass booms?
Almost never. Play the same monitors in another room and the boom moves to a different note.
Can I hear which note booms?
Yes. Play a slow bass sweep and listen for the note that suddenly gets louder. The free Boom Finder does this in your browser.