https://www.jimdunlop.com/mxr-reverb/
Since its release, the MXR Reverb is turning heads world-wide with its 6 studio quality reverb modes all served up in a simple and compact package.
The SPRING style sets a new standard for truly authentic sounding reverb without coiled metal—a perfect recreation of the classic amp-based effect, with the Tone control taking you from dark vintage amp spring, through classic jangle, to bright surfy splatter.