Shin-ei ER-23 Echo Reverb Master Phaser or can be pushed harder

or can be pushed harder against the pinch roller for momentary bouts of extra warbliness)

concise run-down of what it does then this Eventide Harmonizer H949 page on Vintage Digital is a place to start

Super-rare early 70s effect unit

The seller is keeping one

underneath the the text

Shin-ei ER-23 Echo Reverb Master Phaser or can be pushed harderRare 70s spring reverb pedal. Looks brilliant. Sounds great if you're looking for something like a cheap old amp spring that also overdrives really well. Demo below featuring overdriven beats through this unit for sale. Right now we've even got a choice of two units in different colour schemes we really are too good to you (you can find the other ER 23 here both are the same price). Full name is: Shin ei Echo Reverb Master ER 23 Adaptor Special