The Guyatone SD-2 Sustainer D is an analog compressor and sustainer pedal, labeled by the maker as a "SUSTAINER COMPRESSOR"1. RockBoard's PedalPedia describes its range of sounds as "everything from subtle boosts to creamy, violin-like tones that other distortions can only brag about"1. For players, that places it in the territory of compressor pedals that hold notes longer and even out dynamics, with a Level control to set how loud it sits in the chain.
What it does
The SD-2's controls are simple. Its Level control "varies the overall output volume," so the pedal's effect on sustain and compression is fixed by the circuit, and the player sets only how much level it sends onward1. That makes it a set-and-forget kind of pedal: dial in the output volume and play.
Guyatone also points the pedal at bass players, asking "Want a real treat? Plug your bass guitar into the SD-2 and feel it come alive!"1. Players looking at related Guyatone compression designs might also compare the Guyatone STm5 Compressor/Sustainer, the Guyatone BL-2 Bottom Limiter, or the Guyatone PS-021 Guitar Exciter / Compressor.
Videos
shnobel
Bartosz Sienkiewicz
Doc De Roeck
Questions
Is the Guyatone SD-2 analog or digital?
The SD-2 Sustainer D is an analog circuit, according to Guyatone's product information. It runs on a 9V DC, center negative power supply and draws 10mA, which makes it easy to fit into most pedalboard power setups.
Can you use the Guyatone SD-2 with bass guitar?
Yes. Guyatone's own product material invites bass players to plug a bass guitar into the SD-2, saying it makes the pedal come alive. That makes it a candidate for players looking at compressor-style pedals that work across both instruments.
Sources (1)
- SD-2 Sustainer D by Guyatone, RockBoard PedalPedia, 2026
