Akai MPC4000 (2002–2007)

Name: Akai MPC4000
Brand: Akai

Standalone 24-bit music production workstation with 96kHz sampling, 64-voice polyphony, and SCSI/USB connectivity.

Overview

The Akai MPC4000 is a standalone music production workstation developed by Akai Professional and produced from 2002 to 2007. It was the most powerful model in the MPC line at its launch, featuring a 24-bit/96kHz sampling engine shared with the Akai Z4 and Z8 samplers. The unit includes a 320 x 240-pixel backlit, tiltable grey-scale LCD and 16 velocity- and pressure-sensitive rubber pads with six assignable banks. It supports keygroup and drum program creation, with a sequencer offering 960 ppqn resolution, 128 tracks per sequence, and up to 128 sequences. Project files (.PRJ) save all sequences, songs, samples, programs, and multis.

Specifications

Production years	2002 – 2007
Dimensions	526mm (W) x 170mm (H) x 453mm (D) (with LCD tilted down)
Weight	10.5kg
Display	320 x 240-pixel backlit, tiltable grey-scale graphical LCD
Pads	16 velocity- and pressure-sensitive rubber pads (4x4); six assignable banks
Sampling resolution	24-bit
Maximum sample rate	96kHz
Sampling rates	44.1kHz, 48kHz, 96kHz
Polyphony	64 voices (32 voices at 96kHz sample rate)
Standard memory	16MB (on UK units)
Memory expandable to	512MB
Memory type	PC100 or PC133 SDRAM (168-pin DIMM)
Included hard drive	20GB (UK/European standard), pre-filled with sounds / 80GB EIDE hard drive (North American standard)
Storage	Internal hard drive, SCSI port; originally included Zip250 and CD-RW drives
Standard effects	Four-buss stereo effects card (EB4J/EB4JS) with over 50 effect types
Effects processor	4-channel 24-bit/96kHz processor
Sequencer resolution	960 ppqn (pulses per quarter note)
Sequencer maximum events	300,000 notes (equivalent)
Number of sequences	128
Tracks per sequence	128
Song mode	128 songs, 250 steps per song
Real-time controls	4 Q-Link knobs and 2 note variation sliders
MIDI Input	5-pin DIN x 2
MIDI Output	5-pin DIN x 4
Filters	36 resonant filter types (2/4/6-pole LP, BP, HP, notch, etc.)
Modulation matrix	More than 30 assignable modulation items
Envelope Generators	3 (2 multi-stage)
LFO	2 multi-wave with MIDI clock sync
Rec In LINE/MIC L/R	1/4-inch TRS/XLR Combo jack, balanced
Rec In PHONO L/R	RCA x 2 with RIAA EQ
Main Out L/R	1/4-inch TRS/XLR Combo jack, balanced
Headphone	1/4-inch TRS, 60mW (32ohm)
Digital I/O (IB-4D)	RCA (SPDIF) In & Out, BNC Word Clock In
SMPTE In/Out	1/4-inch TRS, balanced
Footswitch	1/4-inch phone x 2
SCSI	50-pin connector x 1
USB	Host x 1, Slave x 1 (V1.1)
Power supply	100 - 240V AC 50/60Hz 70W (27W without options)
Sound library compatibility	S1000, S2000, S3000, S5000, S6000, MPC2000/2000XL/3000 .snd, Emu EIII (*)
Sample format	Native .WAV
Disk format	FAT32
Technology	Digital

Design

The MPC4000 shares the Z-96 LSI sampling/synthesis engine with the Akai Z4 and Z8 samplers and uses a high-performance Intel CPU. It features a solid metal front panel and supports virtual sampling for streaming playback directly from the hard disk. The unit includes IntelliSample for automated sampling and program creation, Quick FX resampling via effects presets, and a built-in sample rate converter on the digital input. Filter modulation is integrated into the APM (assignable program modulation) matrix, and ak.Sys Control & Networking software enables Mac/PC connectivity via USB.

Context

The MPC4000 was part of the Akai MPC series of Music Production Centers, succeeding models like the MPC60 MkII, MPC3000, MPC2000, and MPC2000XL. The MPC concept originated in 1988 with the MPC60, a collaboration between Roger Linn and Akai. At launch, the MPC4000 was the most powerful model in the line, offering expanded polyphony, higher sampling resolution, and advanced modulation capabilities.

Market

The MPC4000 is now considered vintage, with common repairs including LED replacement for the LCD backlight, tact switch and fan replacement, and pad circuit repairs. Replacement parts can be expensive. Users have noted the Play Start button is prone to accidental presses, and the beat-slicing function was criticized as overly complex. The unit is praised for its robust, roadworthy build and sound quality described as "crisp," "clean," and "pristine," with filters noted as "much grittier than anything heard before."