Hi Billue,
Check out Audio-Video Club of Atlanta. Website is a-vcoa.org. Also, later this month Saturday May 21st is the inaugural CanLanta 2016 held at the Marriott Century Center. Clairmont Rd at I-85. Website is canlanta.org.
This is a gathering of top headphone and accessory manufacturers and local DIY enthusiasts giving "live" demonstrations of the latest gear and technology. General admission is $5 but free to students, police, fire and rescue and military with valid ID. Cheers!