The AKG Perception 820 Tube microphone handles a wide dynamic range while delivering real tube sound quality thanks to its dual one-inch large diaphragm capsule and sophisticated ECC 83 dual-triode circuitry.The included remote control unit allows selection of 9 different pickup patterns, and controls the switchable bass-cut filter and the attenuation pad. A ground lift switch prevents unwanted hum if necessary.The AKG Perception 820 Tube comes complete with a spider-type shock mount, mic cable and a metal carrying case. Two back-to-back one-inch large diaphragms featuring True Condenser Technology ECC 83 dual-triode tube circuitry emphasizes even-order harmonics for rich, smooth and three-dimensional sound Remote control unit allows selection of 9 different pickup patterns from omnidirectional to cardioid to figure 8 Switchable bass cut filter (80 Hz, 12 dB/oct) reduces unwanted rumble or footfall noise 20 dB attenuation pad enables high SPL applications up to 155 dB Brush-finished, anodized aluminum front plate and all-metal housing for maximum shielding Ground lift switch prevents unwanted hum if necessary Designed and engineered in Vienna, Austria