I recently picked up a used Boss RE-20 Space Echo for my analog synthesizers. I spent quite a bit of time researching this twin effect pedal and finally decided to give it a try. I actually quite like it so far when used with my Korg Poly-61, Roland Juno 106, and other synths. the reverb is very usable and the delay/echo is excellent. I particularly like how the effect trails when playing which is one of the main reasons I bought it. You can also change synth patches and the trails will continue and not get cutoff.
I usually have my analog synths on an Ultimate Stand and I found that I could easily velcro the Boss RE-20 near the top of the stand propped up above my top synth. The knobs are tilted perfectly so I can tweak while playing any of the synths. I must say that the Boss RE-20 sounds really warm. I usually set the reverb in the low 25% range and up the bass a bit. You can also back off on the treble which can fatten things up a little bit. This pedal effect really enhances my analog synths tremendously and when bypassed I hardly notice that much tone loss. I know there is some, but I don’t really hear it that much.
The reverb I suppose can be tinny with a lot used, BUT, this can work well depending on what patch you are using in your synth. I also like the tape nuances in the pedal and the echo really compliments nicely with sounds from my Korg and Roland synths. After reading mostly excellent reviews of the Boss RE-20, I felt it would work nicely with my analog synths adding some delay, reverb, and a bit of extra flavor that the Boss RE-20 provides. I also like the input volume and the distortion you get when cranked which is pretty cool on some gritty synth patches. I feel there is much more to learn about this pedal and I’m happy with the purchase. It’s definitely a lot of fun and like others have mentioned, it does sound nice with analog synthesizers for sure.
Note that the Boss RE-20 is not an analog effect, rather I use it on analog synthesizers. The Boss RE-20 is all digital, but sounds very warm with my analog synths. It’s actually quite a popular twin pedal for analog synth enthusiasts and for the dub crowd which I recently discovered. I’m not particularly into Dub Music, but it’s pretty useful for that genre. The Boss RE-20 is also popular among guitar players of course and I’ve even heard vocalists us it for creating a unique sound for their voice. You can use this for Dub vocals too.