[. . . ] W MICROPHONE I R E D N/D868 User Manual The N/D868 is truly a top performer in any application. [. . . ] Known as proximity effect, maximum bass response is produced in close-up use with the microphone ¼ inch from the sound source. Normal bass response is experienced with working distances greater than 24 inches. Working close 2. The microphone should be located close to the sound source to minimize interference from other potential sound sources. 3. Use the 3-to-1 rule when using multiple to the microphone will produce a more robust sound. Close up positioning of the microphone will also reduce the potential for feedback from the sound reinforcement system. When , the bass-boost provides an increase in The mixer gain may be microphones. Place each microphone three times farther from other microphones as from the desired sound source. overall microphone output level. 4. Minimize over-handling of the microphone to reduce unwanted mechanical noise proportionately reduced, resulting in a reduction of the systems sensitivity to feedback caused by sound entering the microphone from the loudspeakers. 5. Working close to the microphone will increase the bass tone and also provide increased gain-before-feedback. Warranty This product is guaranteed against malfunction from any cause for two (2) years from the date of original purchase. In addition, the Limited Warranty for the acoustic system contained in the microphone shall apply for the life of this product, defines as a period of ten (10) years from the date that the manufacture of this microphone model has been discontinued. [. . . ] ParqueChapultepec#66-201, ElParque, Naucalpan, Mexico, DF 53390, Phone:011(52) 5358-5434, FAX:011(52)5358-5588 Part Number 535836 [. . . ]