DMX 15-80S
Effects by AMS
The AMS DMX 15-80S is a stereo digital delay and pitch shifter that Advanced Music Systems introduced in 1978. It was the first microprocessor-controlled 15-bit digital delay, built to BBC broadcast specifications, and its clean delays and pitch shifting made it a studio favourite for vocal doubling and the pitched, gated drum sounds of 1980s pop and rock.
Specifications
| Type | Stereo digital delay and pitch shifter |
| Controls | Numeric keypad with battery-backed memory presets; per-channel input gain, output level, pan/mix, regeneration and low-pass filter; phase switch; nudge buttons (25 us steps); sinusoidal VCO modulation (0-20 Hz); pitch shift up to plus or minus one octave |
| Delay Time | Up to 6.515 seconds per channel; over 32 seconds total across both channels |
| Chip | Effective 15-bit encoding (12-bit conversion with three 6 dB gain ranges); 90 dB dynamic range; 18 kHz bandwidth, constant regardless of delay; THD under 0.03% at 1 kHz |
| Format | 19-inch rack, 2U |
| Dimensions | 432 x 310 x 89 mm (W x D x H) |
| Weight | 12 kg |
| Power Supply | 110/220/240 V AC, internally adjustable |
| Power Consumption | 30 VA maximum |
| Connections | 2 x XLR-3-31 female inputs (10 kohm, balanced); 2 x XLR-3-32 male outputs (150 ohm, balanced) |
| Notes | World's first microprocessor-controlled 15-bit digital delay and pitch shifter, originally built to a BBC broadcast specification. |
