I see that some claim that to avoid the room becoming too dead and boxed in, it's better to use diffusers for midrange and treble and then helmholtz' for the bass. Is this a better way to treat the room rather then using broadband bass traps?
It's said by those who support this that often it's enough to treat the lowest bass frequencies problem. Treating the lowest ones, also resolves the upper bass frequencies.
I've added two pictures that demonstrates this. The first one without any acoustic treatment, and then the second one where only the lowest one (around 32Hz) has been adressed with a helmholtz resonator.
It's said by those who support this that often it's enough to treat the lowest bass frequencies problem. Treating the lowest ones, also resolves the upper bass frequencies.
I've added two pictures that demonstrates this. The first one without any acoustic treatment, and then the second one where only the lowest one (around 32Hz) has been adressed with a helmholtz resonator.

