Kurzweil K1000 (1988)
A 76-note digital synthesizer and sample playback instrument introduced in 1988 as part of Kurzweil’s accessible K1000 series.
Overview
The Kurzweil K1000 is a digital synthesizer and sample playback instrument launched in 1988 by Kurzweil Music Systems. It features a 76-note semi-weighted keyboard and was designed as a more accessible alternative to the high-end K250. The K1000 series includes expander modules (PX, HX, SX, GX) and keyboard variants, with the K1000 serving as the foundation for later models like the K1200 and Pro76. It lacks user sampling but retains advanced synthesis and multitimbral performance capabilities.
Specifications
| Polyphony | 24-voice polyphony |
| Keyboard | 76-note semi-weighted keyboard |
| CPU | Motorola 68000 |
| Display | LCD display with dedicated display chip set |
| Memory/ROM | Expandable ROM sounds; Engine EPROMs at U21 and U32; Setup EPROMs at U22 and U33 in expanders |
| Backup battery | For saving user changes in RAM |
| Dimensions | 121 x 33 x 12 cm |
| Weight | 15 kg |
Design
The K1000 uses a sample playback architecture with ROM-based sounds and omits user sampling to reduce cost. It features a modular design with a base sound block that can be upgraded using the KXAB expansion. The system is built around a Motorola 68000 CPU that boots from engine EPROMs, with circuit topology divided across power supply, CPU, and display boards. A diagnostic mode displays "KURZWEIL 1000 TEST SUPERVISOR," and the MIDI SCOPE feature is activated by pressing PLAY/EDIT + CHANNEL UP + CHANNEL DOWN.
Context
Introduced in 1988, the K1000 series bridged the gap between the flagship K250 and future workstation designs. It was positioned as a more affordable, fixed-architecture alternative to Kurzweil’s expandable high-end models. The K2000 succeeded it with enhanced sound creation capabilities, while the K1200 and Pro76 evolved directly from the K1000 keyboard and PX1000 expander designs.
Market
The K1000 is commonly found on the used market for under $200, with anecdotal reports of units sold for as low as $75 at yard sales. Aftermarket sample packs remain available, indicating ongoing user interest. Service manuals and schematics are accessible, with a service manual priced at $75, and common issues include power supply failures, EPROM contact problems, and LCD or battery-related corrosion.
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