Frequency Reference Chart

EQ is the most powerful tool in your mix, and the most misunderstood. Every producer knows they should use it, but not all of them know why they're cutting where they're cutting. The difference between a muddy, cluttered mix and a clear, professional one comes down to frequency awareness: knowing where each instrument lives, where it clashes, and where to make space.

This guide gives you that awareness in concrete terms. Not abstract theory: real numbers, real ranges, real decisions.

The Frequency Spectrum at a Glance

The human ear hears from roughly 20Hz to 20kHz. That's a massive range, but the useful mix space (where most instruments and vocals live) is much narrower. Here's how the spectrum breaks down:

Band	Frequency Range	Character & Common Uses
Sub-Bass	20–60 Hz	You feel it more than hear it. Kick drum body, 808s, deep bass lines. Too much here and your mix gets undefined and hard to master.
Bass	60–250 Hz	The warmth and weight of bass guitar, kick drum body, low synths. Cut here on cluttered instruments to let the bass breathe.
Low Mids	250–500 Hz	The boom zone, where instruments get boxy and muddy if not handled. Often cut on guitars and keys to add clarity.
Mids	500 Hz–2 kHz	Body and presence for many instruments. Vocal intelligibility lives here. Guitars and piano compete heavily in this zone.
Upper Mids	2–4 kHz	Clarity and definition. Vocal consonants, snare crack, guitar bite. Boosting here makes things cut through; too much makes them harsh.
Presence	4–6 kHz	Attack and edge. Vocal sibilance, snare snap, hi-hat definition. This is where instruments fight for air time.
Brilliance	6–12 kHz	Sparkle and shimmer. Cymbals, acoustic guitar sparkle, reverb tails. Boost very selectively; it's easy to overdo.
Air	12–20 kHz	The top end that makes recordings sound open and dimensional. Rolls off naturally on most instruments; don't boost here on things that shouldn't have it.

Every Instrument's Home Range

You can't give every instrument everything. They share space, and EQ is how you negotiate who gets which real estate. Here's where each instrument primarily lives:

Instrument	Primary Range	What to Focus On
Kick Drum	40–100 Hz (body) · 2–4 kHz (click)	Body at 60–80 Hz, attack at 2–3 kHz. Cut 200–400 Hz to remove boxiness.
Snare Drum	100–250 Hz (body) · 2–5 kHz (crack)	Fatness at 150 Hz, crack at 2.5 kHz. Cut muddiness at 300–500 Hz.
Bass Guitar	40–400 Hz	Fundamental at 60–100 Hz. Cut 250–400 Hz if it's competing with the kick.
Electric Guitar	200 Hz–4 kHz (mid) · 2.5–5 kHz (bite)	Cut 250–400 Hz to remove boxiness. Boost 2.5–4 kHz for presence.
Acoustic Guitar	80–600 Hz (body) · 4–8 kHz (sparkle)	Fullness at 200–400 Hz. Air at 5–8 kHz. Cut mud at 400–600 Hz.
Piano	30 Hz–4 kHz (full range)	Competes heavily with everything. Cut lows below 80 Hz if bass guitar is present. Cut 200–500 Hz when cluttered.
Vocals	100 Hz–4 kHz (fundamentals) · 4–8 kHz (sibilance)	Clarity at 2–4 kHz, sibilance at 5–8 kHz, proximity at 200–500 Hz. Pads below 100 Hz.
Cymbals / Hi-Hats	6–12 kHz (crispness) · 12–20 kHz (air)	Only touch the top end. Cut below 5 kHz if harsh. Boost 8–12 kHz for shimmer.

Use the interactive Frequency Reference Chart to visualize these ranges and hear exactly what each band sounds like in context.

Start From the Problem, Not the Frequency

Most frequency charts assume you already know where to look. In practice you rarely do. You know the mix sounds muddy, or that the vocal is harsh, and the number is exactly the thing you are missing. That is what the Problem Frequency Finder above the chart is for: pick the symptom and it highlights the band, dims every instrument that does not live there, and tells you whether the fix is usually a cut or a boost.

The eight symptoms it covers are the ones that account for most mix complaints. Muddy (200 to 500 Hz) is low-mid buildup from too many sources at once. Boomy (60 to 150 Hz) is untamed bass or a room mode. Boxy (300 to 600 Hz) is the cupped-hands resonance you get from small untreated rooms. Honky (800 Hz to 1.5 kHz) is the nasal, telephone-like midrange. Harsh (2 to 5 kHz) sits where your ear is most sensitive. Sibilant (5 to 10 kHz) is the exaggerated "s" on a vocal.

Two of them are the opposite problem. Thin (80 to 250 Hz) and dull (8 to 16 kHz) are not too much of something, they are too little, and the finder labels those as boosts rather than cuts. That distinction matters because the reflex when a mix sounds wrong is always to cut, and about a quarter of the time cutting is precisely the wrong direction.

One caveat worth taking seriously. Harshness in particular is often not an EQ problem at all: it is what over-driven plugins and clipped converters sound like, and no amount of cutting at 3 kHz fixes a signal that arrived too hot. Before you EQ it out, check your levels. Our guide to gain staging covers the numbers to hit at every stage, and fixing them upstream usually makes the harshness disappear on its own.

The EQ Moves That Actually Work

There are two kinds of EQ moves: corrective (removing problems) and creative (shaping tone). Corrective comes first, always. You can't build a good tone on top of a problem frequency.

The High-Pass Filter: Your First Line of Defense

Every instrument that doesn't need low-end (guitars, synths, vocals, snare, hi-hats) should have a high-pass filter. Not a gentle slope at the bottom of the spectrum. A decisive cut that removes the sub-bass mud these instruments don't contribute to but still occupy.

Typical starting points: vocals at 80–120 Hz, electric guitar at 120 Hz, snare at 100 Hz, acoustic guitar at 60–80 Hz, keys at 60–100 Hz. Adjust based on what you hear.

Surgical Cuts vs. Broad Sculpting

Surgical cuts remove a specific problem: a resonant frequency on a guitar, a boxy sound on a kick, a nasal quality on a vocal. Use a narrow Q (0.5–1.0 bandwidth), cut 3–6 dB, and sweep until you find the exact frequency that offends.

Broad sculpting shapes overall tone: adding air to a dull cymbal, removing mud from a cluttered mix, adding warmth to a thin-sounding instrument. Use a wider Q (1.5–3.0), gentler cuts or boosts of 2–4 dB, and work at the frequencies where the instrument primarily lives.

The Mid-Side Technique for Kick and Bass

If your mix is getting heavy and undefined, the problem is usually that the kick and bass are occupying the same center space with overlapping frequencies. Try this: on the kick, boost 60–80 Hz (the body) and cut 150–300 Hz. On the bass, do the opposite: cut 60–80 Hz and boost 200–400 Hz. Both instruments stay full, but they're occupying different center-stage positions.

The 5 Most Common EQ Mistakes

These kill mixes before they start:

• Boosting instead of cutting first. Most instruments need subtractive EQ, not additive. Find what's wrong before deciding what needs more.
• EQing in isolation. An instrument that sounds great on its own might clash in the full mix. Always make final EQ decisions in the context of the full arrangement.
• Cutting too wide. A 3-octave cut removes way too much along with the problem. Narrow cuts preserve the instrument's natural character.
• Over-EQing. If you've made more than four moves on a single track, you're probably solving a problem that another track is creating. Check what's competing with it first.
• Ignoring the low end. A muddy mix almost always comes from too much energy below 200 Hz. If something sounds cluttered, start with a high-pass filter and a cut at 200–400 Hz before doing anything else.

Professional EQ Strategies

Once you're comfortable with corrective EQ, these strategies will level up your mixes:

Pseudo-multiband: Instead of using a multiband compressor, route an instrument to two busses: one with a high-pass at 200 Hz (for the top end) and one with a low-pass at 200 Hz (for the bottom). Process each separately, then blend. It achieves the same separation with standard EQ.

Re-Amping with EQ: EQ your guitar track hard (cutting out the low and low-mid), then re-record it through your amp. The amp naturally adds back the frequencies that sound right. Combine with the dry EQ'd track for a full-range guitar sound with surgical low-end control.

Pre-EQ vs. Post-EQ: EQ before compression when you want to shape tone; the compressor will react to a cleaner signal. EQ after compression when you're doing corrective work; the compressor has already dealt with transients, and now you're cleaning up what's left.

Frequently Asked Questions