DigiTech RDS-900 (advertised 1985–1986)
Not much is documented about the DigiTech RDS-900. What survives comes mostly from period advertising and a single user report. DigiTech's parent company DOD Electronics ran ads in Modern Recording in 1985 and 1986 listing the RDS-900 as a digital delay system at $259.95, with 8 kHz bandwidth and approximately one second of delay. That put it at the entry level of the DigiTech RDS lineup, below the RDS 1900 ($299.95, 15 kHz, ~2 seconds) and the RDS 3600 ($399.95, up to 7 seconds at reduced bandwidth).
A user report in Studio Sound (October 1986, p.86) confirmed that the "Delay Kill" function did exactly what its name promised. The reviewer wished the control had also been duplicated on the front panel. No service literature, detailed specifications, or production years have surfaced in the usual archives. The RDS-900 appears to have been a straightforward, budget-friendly digital delay of the mid-1980s.
Known specifications (from period advertising)
- Type: Digital delay
- Bandwidth: 8 kHz
- Delay time: approximately 1 second
- Original advertised price: $259.95
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