Sub-bass

20-60 Hz
Rumble, power, physical impact. Often felt rather than heard.

Bass

60-250 Hz
Fundamental frequencies of bass and kick. Warmth and body.

Low-mid

250-500 Hz
Note definition, can sound muddy or boxy if excessive.

Mid

500-2k Hz
Vocal presence, instrument definition. Critical for clarity.

Upper-mid

2-4k Hz
Vocal intelligibility, attack of instruments. Can sound harsh.

Presence

4-6k Hz
Clarity, definition, punch. Vocal sibilance region.

Brilliance

6k-20k Hz
Air, sparkle, harmonic content. Cymbals and overtones.

Instruments

Problem Frequencies

Parametric EQ

0.0 dB
1.0

Octave Bands

1/1 Octave: 31.5, 63, 125, 250, 500, 1k, 2k, 4k, 8k, 16k Hz
1/3 Octave: 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k Hz
1/6 Octave: Additional subdivisions for precise analysis