E-mu E4XT (1996)

The E4XT was E-mu's flagship sampler of the mid-1990s, introduced in 1996 at a list price of $3,995. It sat at the top of the E4 line. This was a professional studio instrument aimed at production work, not live performance. It shipped with 16 MB of RAM, expandable to 128 MB with 72-pin SIMMs, and a 1 GB internal hard drive preloaded with sounds, plus three CD-ROMs. Polyphony was a claimed 128 notes. E-mu's own advertising boasted "What's note rip off? We can't remember."

The E4XT ran on E-mu's Z-plane filter technology and their Digital Modular Synthesis architecture, which allowed 32 layers of patch programming. It had 8 analog outputs, S/PDIF and ADAT digital I/O, a SCSI port, and a single stereo effects processor. Sampling rates went up to 48 kHz at 16-bit resolution. Mix Magazine (May 1997, p.33) covered the E4X Turbo's launch, and EQ Magazine (December 1997, p.62) ran a piece titled "The Sampler That Grew," noting the E4X Turbo's evolution through software updates. Later EOS operating system revisions added real-time DSP tools like Beat Munging, which could analyze drum loops and automatically rework them.

Reception was strong but not uncritical. Reviewers praised the powerful filters, deep modulation and solid build quality. "Built like a tank" is a phrase that comes up. They also noted the filters could sound "robotic and sterile" compared to analog synths, and the menu-driven interface was clunky to program without computer software. The E4XT was used on numerous hit records in the late '90s.

Collectors should know a few things. The internal battery will eventually die and needs replacing. Floppy drive failures are common, SCSI issues plague these older units, the LCD can dim or fail, and power supply capacitors may need recapping. Parts are scarce. Working units tend to sell in the $500 - $800 range, though units have moved for as little as $350.

Known specs at a glance:

16-bit sampling, up to 48 kHz
16 MB RAM standard, expandable to 128 MB (72-pin SIMMs)
128-voice polyphony (some sources list 64; the higher figure comes from E-mu's own advertising)
Z-plane filters, 32-layer Digital Modular Synthesis
8 analog outputs, S/PDIF and ADAT I/O, SCSI
1 GB internal hard drive, 3 CD-ROMs of sounds
Rackmount, no keyboard, backlit LCD

One note on naming: period sources use "E4XT" and "E4XT Ultra" interchangeably, and the research record doesn't clearly separate them as distinct models. They appear to be the same instrument, but the historical record may be inconsistent here.