Video by Wampler Pedals via YouTube
Source
Describing EQ for guitar purposes:
00:00 All About EQ
2:08 80 hz: thump/rumble
3:09 125hz-150hz: bass (guitar)
3:56 300-400hz: fullness (also, mud)
4:36 650-800hz: lower mids
5:27 1000-1200hz: higher mids
5:59 2.2k – 2.8khz: lower treble
6:43 5k-6khz: higher treble
7:32 8khz: presence/clarity/sizzle
8:23 10khz: “air”
9:13 Using a DeEsser or multi-band compression instead of EQ