There’s a religion to bass. You either get it or you don’t.
For decades, subwoofers have been the bastard stepchildren of hi-fi — an afterthought bolted onto “serious” systems by those who didn’t know better, or dismissed entirely by purists clutching their vinyl and muttering about “signal integrity.”
They’re wrong. All of them.
Because bass — real bass — isn’t about rumble. It isn’t about shaking the drywall loose or impressing your neighbour’s chihuahua. It’s about depth. It’s about space. It’s about emotional gravity. It’s about feeling Leonard Cohen whisper from the pit of your stomach and Robert Plant scream directly into your bones. This is where the REL Acoustics No.31 comes in. And if you’ve been living under the illusion that subwoofers are optional, you’re about to be reborn.
A Brief History of the Low End
Subwoofers weren’t always about rattling cinemas and pissing off your downstairs neighbours. The seeds were planted in the 1960s with Raymond Dones’ “Octavium,” which the Grateful Dead used to shake consciousness loose. Then came Infinity’s SS-1, Miller & Kreisel’s early designs, and the slow, obsessive refinement of bass reproduction in the age of rock, disco, and madness. By the mid-70s, Steely Dan mixed Pretzel Logic on one of Kreisel’s early prototypes — and then came Sensurround. In 1974, the film Earthquake turned theatre seating into seismic instruments with Cerwin-Vega subs strapped to 500-watt racks. Within two years, the number of equipped cinemas exploded from 17 to 300. People weren’t watching movies anymore; they were surviving them.
Meanwhile, in New York, David Mancuso was running The Loft, chasing purity, chasing perfection. Disco demanded bass with form, texture, and flesh, and suddenly we had crossovers designed to sculpt energy at 40Hz like it was clay. Out of this came reggae sound systems, Ministry of Sound’s £500,000 Martin Audio rigs, and the global arms race for infrasonic dominance.
That war never ended. The REL No.31 is simply its latest assassin.
REL’s Philosophy: Integration, Not Invasion
Richard Edmond Lord — the man whose initials crown the badge — founded REL Acoustics in 1990 with a mission: to make the best subwoofers in the world. Not the biggest, not the loudest — the best. REL isn’t about brute force. Their magic lies in integration. Unlike most subs, which suckle directly off your preamp or LFE channel, REL’s high-level Speakon input takes its feed from the same output as your main speakers. Translation? The REL hears exactly what your speakers hear — same tonal signature, same signal integrity — and paints below the bottom edge of the canvas without stepping on the artwork.
This isn’t “more bass.” It’s completing the picture.
The REL No.31: A Black Hole Dressed in Piano Lacquer
Let’s get something out of the way: these things are absurd. Ridiculous. They look like they were carved out of a Bugatti and tuned by NASA. At 52kg each and AU$12,999 a pop, the No.31 isn’t just a component. It’s an altar. The cabinet is RF-bombarded to plasticise the timber, sculpted into curves that seem to defy physics, then buried under twelve layers of piano-black lacquer and finished with a chrome-carbon crown that screams quiet authority.
Inside, there’s a 12-inch carbon composite driver powered by 900 watts of NextGen 7 Class-D amplification, backed by a 6kg magnetic structure and a crossover so precise it feels less like electronics and more like sorcery. It’ll dig to 17Hz (-6dB) — deep enough to rattle your soul without breaking a sweat.
This isn’t a subwoofer. It’s a controlled implosion.
Setup: Fast, Ruthless, Precise
Integration matters more than power. More than drivers. More than specs. Get this wrong, and you’re buying distortion dressed as performance. The REL No.31? Twenty minutes. That’s all it took. Crossover, gain, and phase are aligned almost instantly. A couple of tweaks, a crawl test for placement, and suddenly the room disappeared. The thing about truly great subs is that you shouldn’t hear them. You should feel them. The No.31 vanishes into the system so completely that you don’t realise it’s there until you switch it off… and suddenly, the world collapses.
Two Is Better Than One
One sub will give you weight. Two subs will give you a stage. This is about symmetry, about filling nulls, about stitching the room into a seamless hologram. Bass isn’t actually omnidirectional; those lower registers carry positional cues you don’t consciously notice until they’re gone. With two REL No.31s, sound doesn’t just “fill” the room — it reshapes it. Instruments stop being “in the speakers” and start existing in space. That’s not marketing talk. That’s physics.
The Sound: Emotional Authority
This is where it gets weird. You don’t listen to the REL No.31. You live inside it. Cue up Leonard Cohen’s “You Want It Darker” and his voice isn’t “reproduced” anymore — it’s resurrected, chest cavity and all. Spin Daft Punk’s “Contact” and you feel your nervous system realign as the kick drum detonates under your ribcage. Throw on Robert Plant’s “29 Palms” and the entire room breathes like you’ve torn open a time machine to the original studio session. Then lower the volume. Everything stays. The weight, the warmth, the intimacy. That’s when you know you’re dealing with something rare — true linearity.
The Rebirth of Cool
Hi-fi has been obsessed with surface-level clarity for decades. Endless debates about DACs, bitrates, jitter, cables spun from angel hair. None of it matters if you’re missing two octaves of the spectrum. Without bass, your system is a photograph of a painting. Pretty? Sure. But flat. The REL No.31 doesn’t just restore those missing octaves. It restores balance. It restores emotion. It restores the sense of being inside the music instead of looking at it through glass. It’s not about “more.” It’s about whole. And once you experience it, you can’t go back.
Verdict
How much did I like the REL No.31? I bought two. REL didn’t just build a subwoofer. They built a weapon. A scalpel disguised as a sledgehammer. If you want theatre-style chaos, it’ll deliver apocalypse on command. But if you want music — real, breathing, transcendent music — the No.31 is untouchable. This is the sound of authority. The sound of intent. The sound of cool reborn in carbon, chrome, and 900 watts of pure control.
REL didn’t make a product. They made an argument. And they won.
