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Mad Professor Hand Wired Deep Blue Delay Guitar Effects Pedal
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      Mad Professor Hand Wired Deep Blue Delay Guitar Effects Pedal (H92318)
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Natural digital/analog delay with vintage tone and hand-wired quality.

The Hand Wired Deep Blue Delay (DBD) is a natural sounding digital/analog delay, with analog direct signal path. The DBD has about the same bandwidth as the classic tape echo units, and it can be used in front of an amplifier or in amplifier effects loops. There are no noise reduction circuits, which keeps decay of echo as natural as possible. The direct signal path is short and made with analog amplifiers with no filtering. There should be no distortion or tone coloration as long as input level is in range below maximum allowed. The echo signal has a tuned filtering to allow extreme settings without interference. The delay is specially designed to work well with distorted tone, as this is the most critical application, where delays often fail. You can use the pedal before or after distortion. As such, it will work exceptionally well on clean sounds where requirements are less stringent, especially in terms of echo bandwidth and repeat formation. The delay tone has been carefully tuned with lot of attention to the first critical reflection and how the repeats decay.

The Hand Wired Deep Blue Delay is kept small containing just the basic delay features; Delay Time, Delay Level and Repeat controls. It was designed to work as an ambience delay; like that of a vintage tape echo and the repeat formation was specifically designed to allow easy setting and less critical setting of delay time. With delay times higher than 120ms, the delay time is sometimes set on the beat or on a multiple of the beat. Deep blue handles this by not giving full range repeats, but a tuned response that don’t need to be on the beat to sound good.

Why digital? Isn't Analog better for a solid-state solution?
Well, in many ways, the delay medium is less critical and it could be an oil-drum, tape, metal-thread, analog BBD or digital, but the final sound is always set by the limitations of the delay medium and the peripheral circuitry needed to make either work. Mad Professor chose Digital construction to make it compact, stable, with reasonable delay time and virtually service free, where the limitations of the circuit would be less critical. As an outcome, you can set the peripheral circuitry with desired bandwidth and distortion levels with less consideration on the exact limits of the delay medium, while of course always pushing the limits, as with anything musical.

A similar circuit in analog form would be excessively more expensive to make. For the same performance, it would require three to four of the best BBD chips now only available as vintage parts and the size of the pedal would have to be about three times the current size.

Mad Professor Hand Wired Deep Blue Delay Guitar Effects Pedal Features:

  • Hand wired
    Controls
    Level: Sets the level of delayed signal mixed with straight guitar tone, fully counter clockwise there is only straight (un-effected) guitar signal heard and fully clockwise gives the loudest delay.
    Delay: Controls the delay time from 25ms (fully counter clockwise) to 450ms (fully clockwise)
    Repeat: Controls the repeats of the delay signal, fully counter clockwise gives one repeat and at fully clockwise you get infinite feedback.


Mad Professor Hand Wired Deep Blue Delay Guitar Effects Pedal Specifications:

  • Size: (WxHxL): 69mm x 50mm x 111mm (including jacks and knobs)
    Current consumption: 25 to 32 mA depending on delay setting
    Voltage range: 8V to 15V (below 7,5 V delay signal will be muted)
    Input impedance IZ: 180K Ohm's
    Output drive capability: 10K Ohms
    Maximum input voltage: 2V peak 650mV rms
    Signal to noise ratio: 80dB
    Delay time: approximately 25mS to 450mS
    Power requirement: supplied via 2,1 mm standard jack
    Input and output connections: via 1/4" Switchcraft
    Complete bypass and input of circuit: grounded when in bypass


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