In my experience 5 feet is the minimum, but I had little benefit above that.
Under no circumstance, if your experience is like mine, put an Acoustic Revive QR-8 on the bottom or anywhere on the RR-77. This was recommended by one reviewer. It just killed the sound.
Under no circumstance, if your experience is like mine, put an Acoustic Revive QR-8 on the bottom or anywhere on the RR-77. This was recommended by one reviewer. It just killed the sound.