The coefficient of performance (COP) and relative coefficient of performance(COPR) of the standing wave thermoacoustic refrigerator(SWTAR) was investigated. The components of the SWTAR are a reconator tube, a stainless steel bowl-saped resonator cone, a commercial loudspeaker, a spiral stack, a cold side heat exchanger (CSHK) with miniature heat heat pipes (MHPs) and a hot side heat exchanger (HSHX). An operating frequency of 163 Hz was used in this study, with an acoustic power (AP) supply of 10, 20 and 30 W. Cooling loads were heat provided from a thermoelectric module (TEM) by joining the hot side of the TEM to the copper heat absorber and transferring heat to the SCHX through MHPs. The COP of the SWTAR increased with increasing cooling load. The slopes of the COP curves decreased with increasing AP. The COPR of the SWTAR increasing cooling load until it was approximately 30% of AP.