Earthworks IMB30 Omni Semisphere Boundary Layer Microphone, Silver

The IMB & IMBL boundary microphones provide a low profile, pristine sounding microphone solution for permanent sound installations. The extended high frequency response to 30kHz and True Semisphere polar response allow those speaking to maintain the same intelligibility at the front and sides of the microphone without a loss of high frequencies. In addition, the extremely fast diaphragm settling time allows more subtle details of the human voice to be reproduced, which adds to the amazing clarity and intelligibility of these microphones. A prominent feature of the IMBL microphones is the LumiComm LED Touch Ring (with dual color LEDs in red & green) that is touch sensitive and can be used to turn the microphone either on or off or any other programmed function, simply by touching the light ring. The IMBL system interface board will allow the touch ring to be programmed by standard system interfaces or logic control systems. The IMBL system interface board is powered from an external power source of 8 to 28VDC @ 85-170 mA (current is dependent upon number of LEDs illuminated at one time). The IMB and IMBL Boundary High Definition Microphones will provide exceptional sound quality, with very high intelligibility at virtually all angles and distances. High Definition Boundary Microphones for Fixed Installations The Earthworks IMB & IMBL Series High Definition Boundary Microphones are the perfect choice for high quality sound system installations. The extended high frequency response, fast diaphragm settling time and near-perfect polar response all work together to provide the highest performance boundary microphones. The IMB & IMBL Series provides you with the perfect low profile solution for conference rooms and a variety of sound installations, while providing the ultimate in sound quality. Near-Perfect Polar Response David Blackmer, founder of dbx and Earthworks invented a number of new microphone technologies resulting in a totally new approach to microphone design. One such technology was the creation of near-perfect polar response. When you look at the polar response of an Earthworks microphone, the mid-frequencies, high-frequencies and low-frequencies all look very close to a "textbook" perfect polar pattern. In practice this means the polar response of an Earthworks microphone is extremely uniform over its operating frequency range; the frequency response at 90deg. and 180deg. off-axis is very close to the on-axis response. This uniform polar response results in less phase problems and much higher intelligibility at the sides of the microphone. Installation IMB & IMBL boundary mics are to be installed on a stiff surface such as a table, a ceiling or a wall. The mounting hole is 1 1/16" (27 mm). The frequency response in this document is measured with the microphone installed flush in a 3' x 3' (.9m x .9m) rigid surface with incident sound waves hitting the boundary at a 45 degree angle. It is to be noted that the microphone's low frequency roll off can be affected by the surface area of the boundary. The frequency at which the boundary's area starts to influence the low end roll off can be calculated by F=750/A, where A is the area of the boundary.• High Definition Boundary Microphones for Conference Rooms and Fixed Sound Installations• True Semisphere Polar Response (near-perfect frequency response at 0 deg., 45 deg. & 90 deg.) • Very High Intelligibility • LumiComm Programmable LED Touch Ring (with red and green LEDs) • Can be Installed in Conference Tables (includes lock nut) • 60Hz to 30kHz Frequency Response • RF Shielding against cell phones and other RF devices • 136dB Max Acoustic Input • Requires 48V Phantom Power • Available in Black, White or Silver