Compact high-performance microphone preamplifier for the AKG Blue Line Series capsules CK91, CK92, CK93, CK94 and CK98, designed for excellent audio quality and maximum flexibility. Its robust Modulock bayonet coupling allows quick and easy changing of the capsules. The state-of-the-art electronic design ensures high RF immunity in critical environments. The preamp provides a switchable bass roll-off/attenuator with three positions: flat, 75Hz and 10db attenuation. It requires universal phantom powering from 9V to 52V. Audio frequency bandwidth: 20 Hz-20 kHz. Signal to noise: 77 dB-A. Recommended load impedance: 1000 Ohms. Dimensions: 146 x 19 mm. Dark Grey finish.