Roland SDE-3000A (c. 1990)
Surviving documentation on the Roland SDE-3000A is thin, but there is one substantial period source. A digital-delay roundup in DB-Magazine (September 1990, p.71) lists the SDE-3000A as a programmable digital delay and gives the specs in detail. Maximum delay time is 4500 ms. Frequency response is 10 Hz - 17 kHz (+0.5/-3.0 dB) over the 0-1500 ms delay range. It has eight memory locations, an 88 dB S/N ratio, 0.05% THD at 1 kHz, and 100 dB dynamic range. It also has a modulation CV input plus CV input/output jacks. The same listing puts weight at 11 lb and price at $1,095. It was a 19-inch rackmount unit. The dimension figures in the scan are OCR-garbled, so exact height and depth can't be confirmed from this source.
Past that spec block, the record goes quiet. Period studio listings do show Roland effects in professional racks. A house-effects complement in Mix Magazine (November 1990, p.113) pairs Roland with Lexicon and Yamaha units, though it doesn't name a specific model. Exact production years and the full feature set remain unconfirmed.
Known from the DB-Magazine listing:
- Programmable digital delay, 19″ rackmount
- Maximum delay time: 4500 ms
- Frequency response: 10 Hz–17 kHz (+0.5/−3.0 dB), 0–1500 ms range
- Eight memory locations
- S/N 88 dB · THD 0.05% at 1 kHz · dynamic range 100 dB
- Modulation CV input; CV input/output jacks
- Weight: 11 lb · Price (1990): $1,095
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