A thermoacoustically (heat) driven, thermoacoustic refrigerator apparatus, having a novel topology, has produced significant cooling power and efficiency. It has achieved a cooling temperature span of 60 °C, and 91 W of cooling power at a span of 25 °C, with an overall COP of 0.15. These numbers were produced with a porous carbon refrigerator stack and a driver stack comprised of stainless steel wire mesh disks. While easy to fabricate, the wire mesh stack is known to produce poor efficiency with the commercially available wire sizing. New modifications currently being fabricated include: a stainless steel foil roll stack for the driver, a plastic film roll stack for the refrigerator, as well as improved heat exchangers. Substantial increases in amplitude, cooling power, and overall COP are anticipated as a result of these modifications. [Work supported by Office of Naval Research.]