Reverberation Amplifier. Designed to be used with existing Hi-Fi components to give depth and space to music by adding reverberation effects. Quote: "The SR-202 re-creates the dynamic concert hall effects of the original material by producing a reverberation effect which increases brilliance and 'presence'." (Pioneer)
I have a Pioner SX-1250 receiver to go with this. It adds just a bit of reverb, and will make a stone dry signal sound nicer.
Our big time local AM talk station adds reverb to their broadcast. The little station does not. The SR-202 makes the stone dry signal sound a little friendlier.