Akashic Guitar effects PCB lookup
DELAYFEEDBACKLEVEL

125B · 3 knobs

Aion FX

ElysiumAmbient Delay

Based on the Ibanez EM5 Echomachine

Category
Delay
Controls
Delay · Feedback · Level
Difficulty
Advanced
Price
$12.50in stock

From the vendor

An analog-voiced digital delay that emulates vintage tape echo units, with heavy filtering and a soft-clipping overdrive on the repeats.

The Elysium Ambient Delay is an adaptation of the Ibanez EM5 Echo Machine, a late addition to the Soundtank “5 Series” produced from 1996 to 2000.

The EM5 was designed to emulate tape delay units from the 1970s. While the delay IC is technically a digital chip with an analog interface, similar to the PT2399, there is a great deal of filtering applied to the delay signal—including a diode-clipping overdrive stage, similar to the Tube Screamer—which gives it a warm, ambient, and very analog sound that adds depth and substance without getting in the way or muddying the tone, suitable for any style of playing.

Like the rest of the Soundtank series, it was generally overlooked during production, and could be found for $50-70 up until a few years ago. But it has slowly grown to mythical status, particularly after Dave Phillips of LA Sound Design brought attention to the fact that he includes it in many of his professional pedalboards and that it’s his favorite always-on delay. Today, it rarely sells for less than $300.

The Elysium is an exact recreation of the EM5, except that the JFET switching has been converted to true bypass. The original EM5 was notorious for its unreliable switching, so this is a significant improvement on the Soundtank version while keeping the signal path identical.

Note: The PCB-only version of this project uses a type of capacitor that has been temporarily discontinued by WIMA. Please see our news article about the issue and the substitution spreadsheet for project-specific recommendations. We are stocking a limited supply in the mean time. The build document has not yet been updated to reflect this. It does not impact the kits.

Schematic

The schematic is in the vendor's build document, page 8. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 95 rows

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RefValueNormalizedTypeNotes
Resistors 36
R11k1kMetal film resistor, 1/4W
R2470k470kMetal film resistor, 1/4W
R347k47kMetal film resistor, 1/4W
R410k10kMetal film resistor, 1/4W
R522k22kMetal film resistor, 1/4W
R647k47kMetal film resistor, 1/4W
R747k47kMetal film resistor, 1/4W
R847k47kMetal film resistor, 1/4W
R910k10kMetal film resistor, 1/4W
R1047k47kMetal film resistor, 1/4W
R1122k22kMetal film resistor, 1/4W
R1222k22kMetal film resistor, 1/4W
R1322k22kMetal film resistor, 1/4W
R1422k22kMetal film resistor, 1/4W
R1530R30Metal film resistor, 1/4W
R1630R30Metal film resistor, 1/4W
R1722k22kMetal film resistor, 1/4W
R1822k22kMetal film resistor, 1/4W
R1933k33kMetal film resistor, 1/4W
R2010k10kMetal film resistor, 1/4W
R211k1kMetal film resistor, 1/4W
R2251k51kMetal film resistor, 1/4W
R2375k75kMetal film resistor, 1/4W
R24390k390kMetal film resistor, 1/4W
R259k19.1kMetal film resistor, 1/4W
R26390k390kMetal film resistor, 1/4W
R273k33.3kMetal film resistor, 1/4W
R28330R330Metal film resistor, 1/4W
R295k15.1kMetal film resistor, 1/4W
R3010k10kMetal film resistor, 1/4W
R3110k10kMetal film resistor, 1/4W
R3210k10kMetal film resistor, 1/4W
R33470R470Metal film resistor, 1/4W
R34100k100kMetal film resistor, 1/4W
RPD2M22.2MMetal film resistor, 1/4WInput pull-down resistor.
LEDR10k10kMetal film resistor, 1/4WLED current-limiting resistor. Adjust value to change LED brightness.
Capacitors 32
C147n47nFilm capacitor, 7.2 x 2.5mm
C24n74.7nFilm capacitor, 7.2 x 2.5mm
C347pF47pMLCC capacitor, NP0/C0G
C447pF47pMLCC capacitor, NP0/C0G
C54n74.7nFilm capacitor, 7.2 x 2.5mm
C61uF1uFilm capacitor, 7.2 x 3.5mm
C71uF1uFilm capacitor, 7.2 x 3.5mm
C83n33.3nFilm capacitor, 7.2 x 2.5mm
C9470pF470pMLCC capacitor, NP0/C0G
C101uF1uFilm capacitor, 7.2 x 3.5mm
C11100n100nFilm capacitor, 7.2 x 2.5mm
C1247uF47uElectrolytic capacitor, 5mm
C13100n100nMLCC capacitor, X7R
C14100n100nMLCC capacitor, X7R
C15100n100nFilm capacitor, 7.2 x 2.5mm
C161uF1uFilm capacitor, 7.2 x 3.5mm
C173n33.3nFilm capacitor, 7.2 x 2.5mm
C18680pF680pMLCC capacitor, NP0/C0G
C191uF1uFilm capacitor, 7.2 x 3.5mm
C2068n68nFilm capacitor, 7.2 x 2.5mm
C211uF1uFilm capacitor, 7.2 x 3.5mm
C22100n100nFilm capacitor, 7.2 x 2.5mm
C235pF5pMLCC capacitor, NP0/C0G
C241uF1uFilm capacitor, 7.2 x 3.5mm
C2547uF47uElectrolytic capacitor, 5mmRegulator filter capacitor.
C2647uF47uElectrolytic capacitor, 5mmRegulator filter capacitor.
C27100n100nMLCC capacitor, X7RRegulator filter capacitor.
C2847uF47uElectrolytic capacitor, 5mmReference voltage filter capacitor.
C29100uF100uElectrolytic capacitor, 6.3mmPower supply filter capacitor.
C3010uF10uElectrolytic capacitor, 5mmPower supply filter capacitor.
C3110uF10uElectrolytic capacitor, 5mmPower supply filter capacitor.
C32100n100nMLCC capacitor, X7RPower supply filter capacitor.
Diodes 3
D11N58171N5817Schottky diode, DO-41
D21N9141N914Fast-switching diode, DO-35
D31N9141N914Fast-switching diode, DO-35
Transistors 3
Q12N50892N5089BJT transistor, NPN, TO-92Can also substitute 2N5088.
Q22N50892N5089BJT transistor, NPN, TO-92Can also substitute 2N5088.
Q32N50872N5087BJT transistor, PNP, TO-92Can also substitute 2N3906.
ICs 5
RG178L0578L05Regulator, +5V, TO-92
IC1LM833LM833Operational amplifier, DIP8Substitute. Original used NEC μPC4570.
IC2LM833LM833Operational amplifier, DIP8Substitute. Original used NEC μPC4570.
IC3M65831APM65831APEcho IC, DIP-24 wideAvailable from Aion FX. See build notes for more information.
IC4SN74HCU04SN74HCU04CMOS hex inverter, 6 circuit, DIP14
Potentiometers 3
DELAY50kBB50k16mm right-angle PCB mount pot
FDBK.100kBB100k16mm right-angle PCB mount pot
LEVEL100kBB100k16mm right-angle PCB mount pot
Trimmers 3
TR110k10kTrimmer, 10%, 1/4"Bourns 3362P
TR250k50kTrimmer, 10%, 1/4"Bourns 3362P
TR350k50kTrimmer, 10%, 1/4"Bourns 3362P
Switches 1
FSW3PDT3PDTStomp switch, 3PDTAvailable from Aion FX.
LEDs 1
LED5mm5MMLED, 5mm, red diffused
Jacks & sockets 7
IC1-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IC2-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IC3-SDIP-24 socket, wideDIP-24 SOCKET, WIDEIC socket, DIP-24 wide (0.6")See build notes for info on socket choice.
IC4-SDIP-14 socketDIP-14 SOCKETIC socket, DIP-14
IN1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
OUT1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
DC2.1mm2.1MMDC jack, 2.1mm panel mountLumberg NEB/J 21 C or equivalent.
Hardware 1
ENC125B125BEnclosure, die-cast aluminumCan also use a Hammond 1590N1.