I attended the final Allman Brothers concert at the Fillmore East in June 1971. Never heard any band give a finer performance, even five decades later. J. Geils was also on stage, and boy did they give a knockout performance, as well. But ... memories are hard to reconcile with recorded history. First, I purchased a CD, followed by SACD and Blu-Ray audio versions of the Allman brothers concerts (dates include March and June). The sound is nothing like I remember. It lacks fullness, and the percussion is uneven. Bass is best on Blu-Ray, but the holistic soundstage is not present. My current speakers are from Martin-Logan. The good old speakers, Acoustic Research AR-3A are dead and gone. Is modern hi-fi the cause of disappointing representations of Rock n' Roll concerts, or has mag tape lost its luster due to old age? Has recording changed so much that only a modern digital recording sounds good through CD's etc.? Help, I am very dismayed. Tell me what sound system works best with the AB recordings.