Kick

• Lows at 20-60Hz
• Weight at 60-80Hz
• Knock/Thump at 120-600Hz
• Click/Bite at 104kHz
• Crack at 3-8kHz

Snare

• Balls at 120-250Hz
• Body at 200-400Hz
• Crack around 1kHz
• Snap at 6-8kHz
• If the kick hits high, roll away the snare lows to avoid masking.

Hi-Hats

• Body at 1-3kHz
• SParkle 8-11kHz
• Sibilance at 5-8kHz
• Rollaway lows from at least 300Hz

Percussion

• Depends on the sound and purpose
• Congas have body at 150-200Hz and slap at 5kHz
• Tambourines sparkle above 5kHz

Bass

• Critical power lives at 50-120Hz
•  Small changes here have a major impact and can cause a bass to sound fat or thin
• Additional harmonics can be found up until around 8kHz

Sub Bass

•  16-60Hz. 
• Keep in mind if you're producing music to be heard in the club, that most club sound systems' low end falls off between 30 and 40Hz.

Bass Guitar

• Botton end at 50-80Hz
• Fat and Chunky around 250Hz
•  Growl at 600-700Hz
• Figner noise from 700Hz-1.2kHz
• Snap at 2.5kHz

Lead Synth

• Can be hot anywhere from 60hz (in a bass as lead scenario) to 8kHz.
• It's important that your lead works alongside the bass, not against it, so check for overlapping frequencies.
• If the bass must dominate, cut the lows out of the lead synth.
• In scenarios where the bass acts as your lead synth, remember to cut out the extreme sub bass lows. 

Pads

• Find body and warmth around 200-400Hz
• Presence can be found around 1.2kHz
• If your pad is playing a supporting role, cut out lows and some high end. 

Keys

• Find fullness as far down as 80Hz
• Presence at 2.4-4kHz
• Rollaway extreme lows to make room for sub.

Electric Guitar

• Body at 250-450Hz
• Presence at 1.3-2.8kHz
• Clarity at 3kHz
• Muddy below 80Hz
• Beware of spiky frequencies 

Vocals

• Body at 200-700Hz
• Nasal at 1Khz
• Presence at 4-6kHz
• Male vocal range is from 250Hz-9kHz, with overtones above
• Air at 11-12kHz+
• Rollaway extreme lows below 80Hz 
• Be careful when boosting 5-10kHz as it risks adding sibilance.