E-mu Emax

E-mu's blue-backlit attempt to put a real sampler on a working musician's keyboard stand. It has a floppy drive that will fail on you.

Overview

The E-mu Emax cost $2,995 when it arrived in 1986. That put it within reach of a normal musician's budget, which the Emulator II never was. The Emulator II ran 1984 to 1987 and was priced at over $7,000, a studio instrument rather than a working one. The Emax was E-mu's low-cost answer, built in the United States and aimed at the same players the Akai S900 was courting that same year. E-mu's own advertising in Mix (1987, p.16) framed it that way, promising to make readers rethink "what a digital sampling keyboard can do. And what one should cost" - and positioning the Emax as the affordable heir to the company that had invented affordable sampling with the Emulator.

The sound is the reason people still hunt these down. The Emax samples at 12-bit and plays back with 16-bit interpolation. E-mu used that to get perceived 16-bit clarity out of cheaper 12-bit converters. The result is the opposite of clinical: the 12-bit engine adds a subtle grit and a digital warmth that lets sampled strings, drums, and vocals sit in a mix rather than poke out of it. Collectors and players describe the character as "musical" rather than "accurate." Where the S900 felt clinical, the Emax felt alive. It wasn't faster or more powerful.

The spec sheet shows the compromises. There are eight voices of polyphony, 512 KB of RAM expandable to 1.5 MB, a 3.5-inch floppy drive for storage, and a variable sample rate you could dial from 22 kHz to 50 kHz depending on whether you needed fidelity or memory. That variable rate was the working producer's friend: crank it to 50 kHz for a vocal stab, drop to 22 kHz to squeeze a bass hit into precious kilobytes. The analysis and playback specs are respectable for the era - 20 Hz to 20 kHz frequency response at ±1 dB, 90 dB A-weighted signal-to-noise, and THD under 0.05% at 1 kHz. Those figures describe the output stage, not the limits of the 12-bit sampling engine.

Key Features

12-bit Sampling with 16-bit Playback Interpolation

This hybrid is the Emax's defining trick and its sonic signature. E-mu used 12-bit ADCs to keep costs down, then applied 16-bit playback interpolation to smooth the result into something that reads as cleaner than its raw bit depth suggests. It's not a 16-bit sampler and never pretends to be, but the coloration it adds is what people want from it now. Producers chasing the late-'80s pop, new wave, and early hip-hop textures that the Emax helped define reach for it because that grit doesn't come out of a modern plugin without effort.

Variable Sample Rate, 22 kHz to 50 kHz

The Emax doesn't lock you to a single rate. You choose per sample: high rates for fidelity, low rates for economy. When every kilobyte was fought over, that flexibility was practical engineering.

512 KB RAM, Expandable to 1.5 MB

Base memory was tight, roughly ten seconds of stereo at the top sample rate. E-mu offered the EMX-MEM1 and EMX-MEM2 expansion boards to stretch the Emax to 1.5 MB. Fully expanded units are the ones collectors want, and they command the top of the market.

3.5-inch Floppy Storage

The Emax stored samples on 3.5-inch floppies, which in 1986 was the modern choice, far more practical than the cassette and proprietary-cartridge schemes that lingered elsewhere. The drive is also the component most likely to have died on any unit you find today. The drive mechanism is a known point of failure, and the rubber pinch roller and belt often degrade after decades.

Blue-Backlit 2-line LCD and Membrane Keypad

The front panel centers on a 2-line, 16-character LCD with a blue backlight that owners remember fondly. The membrane keypad is the other wear item to check. Buyers are advised to confirm every key responds before handing over money.

MIDI In, Out, Thru

Full MIDI implementation let the Emax fit into the growing MIDI studio of the late '80s. It could be sequenced from a workstation like the Sequential Circuits Studio 440, or triggered live from a controller. A single 1/4-inch stereo headphone output rounds out the connections the documentation confirms.

The Emax Family

The original wasn't the only Emax. E-mu shipped the Emax Rack, the Emax HD with a built-in 20 MB hard disk, the Emax HD Rack, and the Emax SE (Synthesis Enhanced, 1988), which added an additive synthesis engine for building sounds from scratch. A final "Plus" model carried an external SCSI port and is reportedly hard to find and desirable for that reason. SCSI could also be retrofitted to second- and third-revision motherboards.

Historical Context

The Emax followed the Emulator II and competed directly with the Akai S900, both arriving in 1986. The S900 offered true 12-bit sampling with 12-bit playback, 12-voice polyphony, and a more intuitive interface, so on paper it was the stronger machine. The Emax answered with character and with E-mu's reputation, and for many producers that was enough. Period advertising in Mix (1987, p.44) pitched the growing family - Emax, Emax Rack, and the new hard-disk model - as "the only sampling instrument in its class with built-in hard disk storage," leaning on the onstage and studio value of not waiting on floppies.

Production dates are muddier than the spec table's 1986-1990 suggests. The article record holds that the Emax's run lasted until 1989, when E-mu released the Emax II, a 16-bit successor with 32-voice polyphony, sample rates up to 48 kHz, and support for up to 8 MB. Other sources stretch production to 1995. The transition year is ambiguous, so treat any single end-date claim with suspicion.

The Emax turns up in late-'80s pop, new wave, and early hip-hop. Prince's camp used one: Dr. Fink reportedly filled an Emax with samples from the Fairlight CMI so the keyboard wouldn't have to tour, and Prince later used that sample set in the studio. An Emax is visible in photos from Paisley Park during the Lovesexy era.

Collectibility & Value

Working Emaxes surface regularly, and in 2025 a good-condition unit typically sells for $800 to $1,500, with fully expanded models - 1.5 MB RAM and a clean floppy drive - at the higher end. Completed-sale data on eBay is far more scattered: a high of $1,615, a latest sale of $745, a median down around $141 and a low of $39, at roughly four units a month. That spread reflects condition and completeness. Parts units and bare bones drag the median down, and the "Plus" SCSI model is reportedly hard to find and priced accordingly.

Capacitor leakage on the analog output board can damage op-amps and require costly repairs. The floppy drive is the other classic failure, and many owners now fit Gotek floppy emulators with USB drives to avoid hunting down 3.5-inch media. Prioritize units with replaced capacitors and a tested drive, listen for crackling in the outputs, and confirm every membrane keypad button responds. Service documentation survives - a service manual and SCSI retrofit instructions are both archived online.