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PROJECT NAME
CRESCENT
BASED ON
MI Audio Crunch Box
EFFECT TYPE
Amp-Like Distortion
PROJECT SUMMARY
A Marshall-like distortion pedal noted for its high-gain "stack of amps" tone.
Actual size is 2.3" x 1.86" (main board) and 1.78" x 0.86" (bypass board).
CRESCENT AMP DISTORTION
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.1 (2021-04-12)
1
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Table of Contents
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Summary of Contents for aion CRESCENT AMP DISTORTION
- Page 1 Intermediate EFFECT TYPE DOCUMENT VERSION Amp-Like Distortion 1.0.1 (2021-04-12) PROJECT SUMMARY A Marshall-like distortion pedal noted for its high-gain “stack of amps” tone. Actual size is 2.3” x 1.86” (main board) and 1.78” x 0.86” (bypass board). CRESCENT AMP DISTORTION...
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Page 2: Table Of Contents
6 Drill Template INTRODUCTION The Crescent Amp Distortion is an adaptation of the MI Audio Crunch Box, a tweaked hybrid of the Marshall Guv’nor and Bluesbreaker first released in 2006. It’s solidly in the family of Marshall-like pedals and is lauded for its high-gain “stack of amps” tone. It has seen has seen at least five major versions since that time, with the fourth and fifth version being renamed to the Super Crunch Box. -
Page 3: Parts List
Power supply filter capacitor. 47uF Electrolytic capacitor, 5mm Reference voltage filter capacitor. 100uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. 100n MLCC capacitor, X7R Power supply filter capacitor. 1N5817 Schottky diode, DO-41 1N914 Fast-switching diode, DO-35 1N914 Fast-switching diode, DO-35 CRESCENT AMP DISTORTION... - Page 4 DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. BATT Battery snap 9V battery snap Optional. Use the soft plastic type—the hard-shell type will not fit. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. CRESCENT AMP DISTORTION...
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Page 5: Schematic
SCHEMATIC 1N5817 VOLTAGE 100uF 100n 470n 10uF 47uF 470n 1N5817 1N5817 TC1044SCPA 10uF DRIVE 100kB 100pF 220n 100pF 100n TONE 10kC IC1A 470R IC1B TL072P TL072P CRESCENT AMP DISTORTION... -
Page 6: Drill Template
VOLUME DRIVE x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” CLIP TONE x: -0.85, y: +0.66 x: 0, y: +0.66 ø1/4” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” CRESCENT AMP DISTORTION... -
Page 7: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B CRESCENT AMP DISTORTION... -
Page 8: Wiring Diagram
GND +V +V JACK GND JACK GND GND PCB 125B Shown with optional 9V battery. If battery is omitted, both jacks can be mono rather than one being stereo. Leave the far-right lug of the DC jack unconnected. CRESCENT AMP DISTORTION... -
Page 9: Document Revisions
The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.1 (2021-04-12) Corrected a few mixed-up capacitor values in the parts list. (The schematic and Mouser spreadsheet were correct.) 1.0.0 (2021-03-19) Initial release. CRESCENT AMP DISTORTION...
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