Why your deep house track sounds smaller than the reference
Your mix is tight on paper but smaller in the room. Before reaching for another compressor, the problem often stems from stereo sub information, kick-and-bass frequency collision, stab low end, or reverb tail buildup.

You're A/B'ing your track against a Larry Heard cut in the same key, at matched loudness, and the reference still sounds twice the size. Not louder. Bigger. There's air around the kick, the bass feels planted, the pads sit behind everything without crowding it. Before you reach for another compressor or a wider stereo imager, the problem is almost always one of four things, and they stack.
Your sub is carrying stereo information it shouldn't
This is the most common cause and the easiest to miss on headphones. A stereo bass patch, a chorus across the full frequency range, or a Haas delay on the bass channel puts out-of-phase content in the sub register. On headphones it sounds wide and impressive. Fold to mono and the bottom drops out, because the out-of-phase components partially cancel. Club rigs sum to mono, and even a stereo PA loses sub energy when the two sides combine in the room. This is why it's crucial to get the sub in mono, otherwise your mix will fall apart on larger systems.
The fix is mechanical. On the bass bus, insert an M/S EQ (Pro-Q 4, EQ Eight in M/S mode, TDR Nova) and high-pass the side channel at 100-150 Hz with a 12-24 dB/oct slope. Everything below that frequency collapses to mono; the harmonics above stay where they were. Armada's production guide goes as far as 120 Hz on the master bus for the same reason. If you're in Ableton and don't want to think about it, a Utility set to mono below the crossover does the same job with one parameter.
Then check it. Fold the whole mix to mono and listen from 40 Hz up. If the track loses noticeable weight, you haven't fixed it yet.
The kick fundamental and the bass fundamental are sitting on each other
A deep house kick has its fundamental somewhere between 55 and 80 Hz. If your bass root note's fundamental lands inside that band, the two signals mask each other and turning either one up just makes the low end louder, not clearer. The kick feels buried at any fader level. This is the problem Kerri Chandler engineered around when he modified his 909 to add an octave underneath the kick: he told Red Bull Music Academy that "instead of one kick there was an octave built in from my 909 and everyone started looking at me: 'How the f**k [do you do this]? My 909 doesn't sound like this.'" The point isn't to copy the mod. The kick's relationship to the sub is something you design, not something you discover after the fact.
Two ways to fix it. The first is tuning. Solo the kick, sweep a narrow 10 dB boost with a Q of about 2 through 40-100 Hz, and find where the body sits. Then tune the sample so that fundamental lines up with the root note of your track, or the fifth (+7 semitones). The kick and bass reinforce instead of fighting.
The second is a dynamic sidechain EQ on the bass at the kick fundamental. Drop Pro-Q 4 on the bass channel, create a dynamic bell at the kick's frequency, Q of 1-2, gain reduction 3-6 dB, external sidechain triggered by the kick. Pro-Q 4's dynamic behaviour is program-dependent (attack, release, and knee all adapt to the source), so it tracks the kick's actual envelope rather than pumping on a fixed curve. Only that frequency ducks, and only when the kick hits. The body of the bass between kicks stays intact, which is the part standard sidechain compression eats.
Stacking this with full-bus sidechain compression is fine if you know what each one is doing, but both together usually thins the bass.
Your chord stab has more low end than you think
Deep house stabs are often voiced low, with 7ths and 9ths that put real energy in the 80-250 Hz band. Even when the patch sounds like a mid-range thing, the lower harmonics are sitting on top of the kick's body and the bass's mid-character. The result: the stab feels bloated, the kick feels small, and pushing the kick fader doesn't help because the stab is in the way.
High-pass the stab at 200-350 Hz, 12-18 dB/oct. Sweep up while listening in context (not soloed) until the stab thins out audibly, then back off until it doesn't. The stab will still sound full where it needs to, because the perceived weight of a chord lives in its mid-range voicings, not in the sub harmonics you can't really hear underneath the bass anyway. If the stab still clashes with the kick on hits, add a small dynamic cut at the kick fundamental, sidechain-triggered, the same way you set up the bass.

Photo by Guillaume Meurice on Pexels
The pad reverb tail is filling the room your kick needs
Long reverb decays on pads and stabs deposit low-mid energy on every chord hit. Unfiltered, those tails overlap bar to bar and turn into a slow accumulation of fog between 150 and 400 Hz. The mix gets murkier the longer it plays, which is why a reference cut sounds spacious through a whole eight bars and yours feels claustrophobic by bar four.
Two moves. First, EQ the reverb send. Insert an EQ before the reverb plugin and high-pass at 300-600 Hz; low-pass at 6-10 kHz to take the top off as well. This is the Abbey Road trick, originally a way to stop reverb from clouding the bass register, and it's more important in deep house than almost any other genre because the pad sends are doing so much of the atmospheric work.
Second, set the decay time to the tempo. At 124 BPM, one bar is roughly 1,935 ms. A 3-second pad reverb is bleeding well into the next bar by the time the next chord hits. Aim for one to two beats of decay on pad sends (480-960 ms at 124 BPM) unless you specifically want the wash. Longer decays are fine for ambient returns that play a different role, but they need aggressive pre-filtering.
Compression is the last thing to add, not the first
When the low-mid clutter is still in the mix, a bus compressor hits those dense moments and pulls the whole track down with them. You gain-match, and now the mix is flatter, smaller, and just as cluttered.
Clean the source problems in order: mono sub, kick-and-bass tuning or dynamic EQ, high-pass on stabs, EQ on reverb sends. Then 2-4 dB of transparent bus glue is usually all the mix needs to sit. If you're reaching for more than that to make it feel competitive against the reference, the problem is upstream.
Start with the mono check. Fold the mix and listen from 40 Hz up. If the bottom falls out, that's the first thing to fix, and the rest of the chain gets easier once the sub is anchored.