For decades, analogue engineers have lived with one irksome law of physics: you cannot compress what you haven't heard yet. "Lookahead" — the trick of peeking a few milliseconds into the future so a limiter can catch a transient before it arrives — has been the exclusive preserve of digital processors. Until now.
At NAMM 2026, Essex boutique manufacturer Cranborne Audio has unveiled the Brick Lane MC4, a four-channel rackmount dynamics processor that, the company says, performs true analogue lookahead without a single analogue-to-digital conversion in the signal path. Sound on Sound reported the launch on 21 January.
"Brick Lane MC4 is something we're genuinely proud of," said Cranborne managing director Sean Karpowicz. "It's the result of years of obsessing over what analogue dynamics could be if you stop accepting the usual limitations. Discovering Analogue Lookahead was thrilling in itself, then applying it to compression, and then realising that the same technology could create what is quite possibly the best analogue noise gate and expander ever made — that's the kind of invention we live for."
Why lookahead has always been a digital trick
Conventional analogue compressors are reactive. A detector circuit watches the incoming signal and, by the time it tells the gain element to duck, the transient has already left the building. Fast attack times can blunt a peak but rarely catch it cleanly, which is why mastering-grade limiters have traditionally lived in the digital domain — where samples can be buffered and inspected before being passed to the output.
To do the same in pure analogue you need to delay the main signal while an unhindered copy feeds the detector, and you have to do it without the phase smear, high-frequency loss or noise penalty of traditional bucket-brigade or tape-based delays. Cranborne's breakthrough — the specifics of which the company is keeping close to its chest — appears to achieve exactly that.
Six flavours, four channels, one Enigma
The MC4 is a rackmount evolution of last year's Brick Lane PWM Modal Compressor 500-series module, expanded to four channels that can be configured as dual-mono, stereo, Mid-Side, series, dual-band or a de-esser. Each channel offers all-analogue PWM compression and gating, with its own insert point for slotting in external colour.
Six compression modes are on the menu. Velvet delivers vari-mu-style vintage warmth; Float offers opto-style transparency; Smash is the FET option for punch and impact; Tame promises ultra-fast surgical transient control; Glue is the bus compressor for cohesion; and Polish, the mastering-grade limiter, leans on the new Analogue Lookahead to deliver what Cranborne call a "zero-attack response". A Stress control layers on mode-dependent analogue harmonic saturation that evolves with gain reduction, blurring the line between corrective tool and creative processor.
The headline-grabber for engineers, though, is Enigma. Traditionally, analogue compressor parameters such as knee shape, attack and release weighting, detector response and high-frequency emphasis are hardwired into component values — fixed decisions users can't revisit. Enigma puts those hidden controls on the front panel. Crucially, Cranborne stress that none of it involves A-D/D-A conversion: audio never leaves the analogue domain.
Hybrid, yes — but not in the signal path
That distinction matters. Plenty of modern processors offer digital recall of analogue circuits — Bettermaker, Tegeler and Heritage Audio have built businesses on it — and some hybrid limiters borrow a brief digital sidechain for lookahead while keeping the main path analogue. The MC4 goes further. Digital control is used only for recall and full plug-in automation over USB or Ethernet; the detector, the delay and the gain element all remain analogue.
Pricing and availability
The Brick Lane MC4 is due by the end of Q1 2026, priced at $2,799 / £2,699 including VAT / €3,099. Full details are on Cranborne Audio's product page.
