Description
Deep Blue Delay solves the age-old problem of delay pedals falling apart under distortion. Mad Professor tuned the repeat filtering specifically for gained-up tones, so the echo stays coherent and musical whether you place it before your dirt or after it. Drop it into a clean signal path and it’s even more forgiving, since the demands on bandwidth and repeat clarity ease off considerably.
The straight signal runs through a short, all-analog amplifier chain with zero filtering, so your dry tone passes through unaltered below max input level. There’s no noise reduction circuitry either — a deliberate choice that lets the echo trail off naturally rather than getting choked artificially. The result recalls the bandwidth and decay behavior of classic tape echoes, with real attention paid to how that first reflection forms and how the tail fades.
Rather than overload you with modes, Deep Blue keeps it to three knobs for an ambience-style delay you can dial in fast. Above 120ms, the repeat response is intentionally voiced so you don’t need to land exactly on the beat (or a clean multiple of it) for the echo to sit right — it just works.
- LEVEL — blends delay into your dry signal, from fully dry (CCW) to loudest repeat mix (CW)
- DELAY — sets delay time from 25ms to 450ms
- REPEAT — one repeat at CCW, runaway infinite feedback at CW
Housed in a compact 69 x 111 x 50mm enclosure with 1/4″ Switchcraft jacks and standard 2.1mm power input (8-15V, 25-32mA), it’s an easy fit on any board. Signal-to-noise runs 80dB, and bypass is true, with the circuit input grounded when off.









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