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PROJECT NAME
EMPYREAN
BASED ON
®
Darkglass
Alpha Omicron
EFFECT TYPE
Bass distortion
PROJECT SUMMARY
A dual-mode bass distortion that delivers modern rock & metal bass tones by way of carefully-tuned
signal filtering, plus a clean blend to retain the low end.
Actual size is 2.3" x 2.61" (main board) and 1.78" x 0.86" (bypass board).
EMPYREAN DUAL DISTORTION
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2025-03-28)
1
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Table of Contents
Related Manuals for aion EMPYREAN
Summary of Contents for aion EMPYREAN
- Page 1 A dual-mode bass distortion that delivers modern rock & metal bass tones by way of carefully-tuned signal filtering, plus a clean blend to retain the low end. Actual size is 2.3” x 2.61” (main board) and 1.78” x 0.86” (bypass board). EMPYREAN DUAL DISTORTION...
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Page 2: Table Of Contents
Then, as with the other Darkglass circuits, there’s a clean blend to mix in the dry signal. The Empyrean is a direct adaptation of the Alpha Omicron based on our trace. It’s been converted to true bypass and the flip-flop circuitry has been removed, but the effect signal path is the same. -
Page 3: Parts List
Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W EMPYREAN DUAL DISTORTION... - Page 4 Film capacitor, 7.2 x 3.5mm 2.2uF Film capacitor, 7.2 x 3.5mm 1uF in original. See build notes. 47uF Electrolytic capacitor, 5mm Reference voltage filter capacitor. 47uF Electrolytic capacitor, 5mm Power supply filter capacitor. 220uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. EMPYREAN DUAL DISTORTION...
- Page 5 Switchcraft 111X or equivalent. 1/4" mono 1/4" phone jack, closed frame Switchcraft 111X or equivalent. 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. EMPYREAN DUAL DISTORTION...
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Page 6: Build Notes
2.2uF. If you want to increase it even further, polarity marks have been added to the footprint, but these should be ignored unless using a polarized capacitor. EMPYREAN DUAL DISTORTION... -
Page 7: Schematic
100n 100k 330k 220k 47pF 100k HI-MID 1N5817 220uF 47uF 47uF 100n 100k 150k IC3B IC3A RC4559P RC4559P IC6B IC6A RC4559P RC4559P IC7B RC4559P 270pF IC5A IC4A IC4B RC4559P RC4559P RC4559P 270n IC7A RC4559P 120n IC5B RC4559P EMPYREAN DUAL DISTORTION... -
Page 8: Drill Template
-0.65, y: +1.71 x: +0.65, y: +1.71 ø9/32” ø9/32” HI-MID BLEND x: 0, y: +0.83 ø1/4” x: -0.65, y: +0.41 x: +0.65, y: +0.41 ø9/32” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.775 x: 0, y: -1.775 ø5/16” ø15/32” EMPYREAN DUAL DISTORTION... -
Page 9: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B EMPYREAN DUAL DISTORTION... -
Page 10: Wiring Diagram
WIRING DIAGRAM NC OUT GND +V +V JACK GND JACK GND GND PCB 125B EMPYREAN DUAL DISTORTION... -
Page 11: Document Revisions
(In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.0 (2025-03-28) Initial release. EMPYREAN DUAL DISTORTION...
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