IsoPac A has seven ClearSonic panels and AX12 extenders in the front, and three S5-2 SORBER baffles in the rear. Seven S2 SORBER baffles are attached to the inside lower portion of the acrylic panels. The clear panels are a total of 6.5' tall, and the S5-2 baffles are 5.5' tall, so there is a foot of open space around the rear of the booth allowing for air exchange.The STC512 twelve inch wide SORBER Lid baffle is added to the standard 3-section lid to yeild 7'W x 5.5'D of lid coverage. IsoPac A includes two lid support bars for maximum stability.
If reflections off the front shields during recording are a problem, a few S2 SORBER baffles can be Velcroed to the offending shields. Attach them at the same height as the mic.