The Shure KSM42/SG Side-Address Condenser Vocal Microphone is a condenser microphone featuring a dual-diaphragm capsule, a custom frequency response, and extensive pop filtering on the inside and outside of the capsule grill. . The Shure KSM42/SG Side-Address Condenser Vocal Microphone is a condenser microphone that features a dual-diaphragm capsule, a tailored frequency response, and extensive stupal filtering inside and outside the capsule grill. PZA MORE SPECS