The Mosky Multi Spring Reverb is a compact reverb pedal from Mosky that emulates a spring reverb tank. RockBoard's PedalPedia describes it as a vintage voiced reverb, an "analog/digital spring reverb emulation" with four reverb modulation modes and true bypass12. RockBoard's PedalPedia notes the circuit is based on the EarthQuaker Devices Ghost Echo V31.
What it does
The pedal sits in the reverb lane but leans toward the character of a guitar amp's spring tank rather than a studio hall. Mosky's own description of the playing experience: staccato playing brings out the reverb's trails as a slapback or echo sound, while sustained playing reveals a large ambient depth that fattens up the sound1. The Attack knob's 30ms to 150ms pre-delay range is what makes the slapback possible, which RockBoard's PedalPedia describes as covering "everything from a quick, rockabilly slapback" to long ambient reverberation1.
The controls: Attack, Dwell and Depth
| Control | What it does |
|---|---|
| Attack | Adjusts the pre-delay from 30ms at minimum to about 150ms at maximum; when Dwell is self-oscillating, it changes the pitch of the oscillations2 |
| Dwell | Sets the length and thickness of the decay; starts to self-oscillate around 3 o'clock, and at maximum descends into an infinite loop of self-oscillation12 |
| Depth | Sets the intensity of the reverb, the wet/dry mix; unity is around noon and everything after is boosted12 |
| Mode selector | Four different reverb modulation modes2 |
| Toggle switch | Adds gain, described by Mosky as a boost2 |
The Dwell control is the one to watch. Mosky's page warns that it "will start to self oscillate around 3 O'clock, the pitch of the oscillations can be changed by turning the Attack control"2, and RockBoard's description adds that at the maximum setting it descends into an infinite loop of self-oscillation1. That is a feature rather than a fault for players who want the spitting, unstable character of a driven spring tank, but it means the pedal can run away on you at high Dwell settings.
The Depth knob doubles as a level trim in the other direction: since unity sits around noon, settings past noon boost the wet signal above the dry2.
Power
The pedal runs on 9V DC, center negative, through a 2.1mm x 5.5mm barrel connector2, the standard arrangement for a pedalboard supply.
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Questions
Is the Mosky Multi Spring Reverb analog or digital?
Mosky describes it as an analog/digital spring reverb emulation, and RockBoard's PedalPedia lists the circuit type as analog. In practice it is a spring reverb emulation built to give a vintage voiced reverb sound rather than a digital room or hall simulation, with a pre-delay of 30ms to 150ms set by the Attack knob.
What power supply does the Mosky Multi Spring Reverb need?
It runs on 9V DC, center negative, through a 2.1mm x 5.5mm barrel connector, which is the standard pedalboard supply. Mosky's product page gives the connector as 9Vdc, center negative, 2.1mm x 5.5mm, so any regulated 9V DC supply with that plug will run it.
Does the Mosky Multi Spring Reverb use a real spring tank?
No. It is a spring reverb emulation, not a pedal with a physical spring tank inside. Mosky describes it as an analog/digital spring reverb emulation machine, and RockBoard's PedalPedia lists it as a vintage voiced reverb based on the EarthQuaker Devices Ghost Echo V3 circuit.
What does the Dwell knob do on the Mosky Multi Spring Reverb?
Dwell adjusts the length and thickness of the reverb decay. Turned up high, around 3 o'clock by Mosky's description, it begins to self-oscillate, and the pitch of those oscillations can be changed with the Attack control. At the maximum setting the pedal descends into an infinite loop of self-oscillation.
What is the pre-delay range on the Mosky Multi Spring Reverb?
The Attack knob adjusts the pre-delay from 30ms at minimum to about 150ms at maximum. Mosky describes that range as covering everything from a quick rockabilly slapback to long ambient reverberation, and when the Dwell is set to self-oscillate, Attack also changes the pitch of the oscillations.
Sources (2)
- Multi Spring Reverb by Mosky, RockBoard PedalPedia, 2026
- MULTI SPRING REVERB_M-SERIES_Products_mosky pedal, moskyaudio.com
