To mix bass and kick together, give each one its own job in the low end: let the kick own the attack and one part of the low frequencies while the bass owns the sustain and another part. You do that with EQ carving, careful level balancing, and often a touch of sidechain compression so the two never fight for the same space at the same moment. Get that relationship right and everything above it sits more easily.
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The low end is where most home mixes fall apart. Kick and bass occupy roughly the same octaves, so when both play flat out they mask each other and the result is a muddy, undefined rumble that also eats your headroom. The fix is not more volume — it is making room. Below is the order I actually work in when I sit down to sort out a low end that isn’t gelling.
Why the kick and bass fight in the first place
A kick drum’s fundamental usually lives somewhere around 50–100 Hz, with its beater “click” or attack up in the 2–5 kHz region. An electric or synth bass has its fundamental in a similar zone — very roughly 40–120 Hz depending on the note and the instrument — plus important harmonics and finger/pick detail higher up. Because their fundamentals overlap, playing both at full level in the same frequency band is like two people talking over each other at the same pitch. Neither wins.
The goal is not to make them identical loud — it is to make them legible. You want to hear the kick as a distinct hit and the bass as a distinct pitched note, even on small speakers or a phone. That means deciding who owns what, then committing to it. Before you touch a plugin, make sure your gain staging is sane and your room isn’t lying to you — a lumpy room can make you chase a low-end problem that only exists at your listening position. Our guide to gain staging and one on acoustic treatment both feed directly into better low-end decisions.
How to mix bass and kick by setting levels first, not plugins
Before any EQ, balance the raw levels. Pull the kick and bass up together and decide which one should feel like the anchor of the track. In a lot of pop, rock and acoustic music the kick is the pulse and the bass supports it; in plenty of hip-hop, house and drum-and-bass the bass (or 808) is the star and the kick is more of a transient click on top. There is no universal right answer — it depends on the song — but you do have to pick, because it drives every move after.
Also check the arrangement itself. If the bass part and the kick pattern are both busy and syncopated in the same register, no amount of processing fully rescues them. Sometimes the cleanest “mix” fix is asking whether a note should move or a rhythm should thin out. Muting one for a bar and listening to the other in isolation tells you a lot about who is genuinely carrying the weight.
How to EQ carve so the kick and bass share the low end
This is the core technique. The idea is complementary EQ: where one instrument is boosted, the other is gently cut, so they interlock instead of stacking. There are two common approaches, and they both work.
The classic split. Pick a crossover point — a lot of engineers land somewhere between roughly 80 and 120 Hz — and let one instrument own below it and the other own just above. A frequent choice: let the kick own the sub-thump around 60–100 Hz and carve a small dip in the bass there, then let the bass own the 100–250 Hz body and carve a matching dip in the kick. These are starting points to move by ear, not fixed numbers; the right crossover depends entirely on the two sounds in front of you.
Boost-and-cut mirroring. Find the frequency where the kick sounds most powerful (sweep a narrow boost until it jumps out — often in that 60–100 Hz range) and boost it a modest amount, maybe 2–4 dB. Then make a matching cut of a similar amount at that same frequency on the bass. Repeat in reverse for the bass’s sweet spot. You have now dovetailed them: each is loudest exactly where the other steps back.
A few practical guardrails. Keep boosts modest — if you find yourself adding 8 or 10 dB, the problem is usually the source or the balance, not the EQ. High-pass anything that genuinely doesn’t need sub content (a distorted guitar, most vocals) so the kick and bass aren’t competing with mud from other tracks. Stock EQ handles all of this comfortably; you do not need anything exotic. If you want a refresher on the moves themselves, see our EQ and compression fundamentals guide, and our free EQ cheat sheet in the tools section gives you a quick frequency map to sweep against. That said, if you’re doing surgical, dynamic low-end carving all day, a dynamic EQ can genuinely beat a static stock band — that’s one place a third-party option from a good EQ plugin earns its keep, though stock will get you most of the way.
Using sidechain compression to lock them together
Sidechain compression is the other headline technique for the low end. You put a compressor on the bass and trigger it from the kick, so every time the kick hits, the bass ducks by a small amount and instantly recovers. The kick’s transient punches through a momentarily clearer space, then the bass swells back. In genres like house it’s an obvious pumping effect; in most other music you use it far more subtly — just 1–3 dB of gain reduction, fast attack, release timed to the tempo so the bass is back before the next beat.
Start gentle: a ratio around 2:1–4:1, threshold set so the kick pulls the bass down by only a couple of dB, attack fast enough to catch the transient, release medium-short. The point isn’t to hear it working — it’s to hear the kick suddenly become clearer. If the bass audibly gulps, you’ve gone too far. Sidechain and EQ carving aren’t rivals; they solve the problem in different domains (time vs. frequency), and using a little of both usually beats a lot of either. Stock compressors do this job perfectly well.
Keep the low end mono and check it honestly
Low frequencies carry almost no directional information, and wide stereo bass can cause phase problems, weak translation on mono systems, and cutting issues if the track ever goes to vinyl. The safe move is to keep everything below roughly 100–120 Hz in mono. Most DAWs have a stock utility or a mono-maker band that collapses only the lows while leaving the highs wide. Set it and forget it.
Then check your work the way listeners will hear it. Flip the whole mix to mono for a moment — if the kick and bass balance falls apart, you have a phase or masking issue to chase. Listen on a phone speaker, which has basically no sub, to confirm the groove still reads when the fundamentals disappear (this is where the kick’s click and the bass’s upper harmonics earn their place). And glance at a spectrum analyser, but trust your ears over the picture. For how the two speakers-vs-headphones question affects low-end judgement, see studio monitors vs headphones for mixing.
Where this fits in the wider mix and master
Sort the kick and bass early — they’re the foundation, and if the low end is wrong, every EQ decision above it is built on sand. Once they lock together, the rest of the mix (vocals, guitars, synths) tends to fall into place with less fighting. When you’re happy, our vocal mixing guide and the broader beginner’s guide to mixing your first song take you the rest of the way.
At the mastering stage, a good engineer or an online service like LANDR will glue the low end further and set your final loudness — commonly around -14 LUFS integrated as a rough streaming target, though you should treat that as a ballpark, not a rule. If you’re mastering it yourself or using a service, our what is mastering and LUFS explained guides cover loudness targets, and you can try an online master here. You’ll also find a LUFS target reference in our free tools. For more low-end and mix technique, browse the full mixing and mastering hub.
Frequently asked questions
Should the kick or the bass be louder?
It depends on the genre and the song. In bass-forward styles like hip-hop and house the bass or 808 often sits louder, with the kick providing a click of attack on top; in rock, pop and acoustic music the kick usually leads as the rhythmic pulse. Balance them together by ear and pick whichever should anchor the track — then commit, because that choice drives your EQ and sidechain moves.
What frequency should I cut to separate kick and bass?
There’s no single number — it depends on the two sounds. A common approach is to find the kick’s most powerful frequency (often somewhere around 60–100 Hz), give it a small boost there, and cut the bass by a similar amount at that same spot, then do the reverse for the bass’s sweet spot higher up. Sweep with a narrow boost to find the exact frequencies, and treat any figure as a starting point to move by ear.
Do I really need sidechain compression on the bass?
Not always. If EQ carving and good level balance already give you a clear, punchy low end, you can skip it. Sidechain compression is most useful when the kick keeps getting buried or in genres that want an audible pump. Even then, a subtle 1–3 dB of ducking triggered by the kick is usually plenty — you want the kick to breathe through, not the bass to obviously gulp.
