The Eventide DSP4000 (1988-1994) was the first unit in what Eventide called the "DSP4000 Hardware Platform," a family that would eventually include the DSP4500, DSP7000, and the DSP7000 Ultra-Harmonizer. It was a 2U rackmount digital effects processor, originally priced at US$4,999. It was a big change for the company. Instead of a fixed set of algorithms, the DSP4000 gave users over 90 building-block "modules" (pitch shifters, delays, filters, and more) that could be assembled into custom effects chains. *Sound On Sound* (November 1998, p.118) later said the 4000 series redefined the state of the art when launched, building on the H910, H949, and the hugely popular H3000.
The specs are serious: 24-bit DSP processing with 16-bit A/D and D/A conversion, sampling rates of 32, 44.1, and 48 kHz, a dynamic range of 96 dB (with 100 dB typical), and THD of 0.01%. It had 200 programs (100 user-definable), true bypass, and MIDI In/Out/Thru. The front panel was a 19-inch, 2U rackmount design weighing 13.2 lbs, with power selectable between 110-220V AC. The DSP4000 had no reverb. That was deliberate, and users consistently noted it. One forum owner called it "reverb-free" and recommended a dedicated reverb unit alongside it.
The DSP4000 was unusual for its user philosophy. Eventide's own advertising said the unit put "the basic building blocks of effects into your hands" rather than locking users into predefined presets (*Mix*, November 1994, p.131). That flexibility had a cost. Owners frequently described a steep learning curve for programming, and the factory presets were often called dated. Long-term owners who put in the time praise the resonator effects, the vocoder ("the best I've heard," one user wrote), and the modulated delay and chorus sounds. A common refrain on forums: "It sounds incredible."
The DSP4500 eventually superseded the DSP4000. It added S/PDIF digital I/O and level trims for both +4dBu and −10dBV sources (*Mix*, June 1998, p.177). The H3000 was retired in 1995, leaving the DSP4000 family as Eventide's flagship processing line. One undated forum post suggests used DSP4000 prices around $800 - $1,000 on eBay and Reverb, though no confirmed current market data exists in the archive.
**Known specifications:**
- 24-bit DSP processing; 16-bit A/D and D/A
- Sampling rates: 32, 44.1, 48 kHz
- Frequency response: 20–20kHz ±1dB
- Dynamic range: 96 dB (typical 100 dB)
- THD: 0.01%
- Delay: 0–32 seconds at 32 kHz
- Programs: 200 (100 user-definable)
- Inputs/outputs: 2 each, unbalanced 1/4" jacks
- MIDI In/Out/Thru; true bypass
- 19" rackmount, 2U; 13.2 lbs / 6 kg
- Power: 110–220V AC (selectable)
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As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.