Feedback suppressor for ideal frequency suppression effect?

Most of the sound engineer in the use of acoustic feedback suppressor, have such an experience: when using a single microphone, microphone, use occurred whistling sound feedback suppressor (such as insert) can be more ideal to squealing voice Bate. However, when using multiple microphones, you receive the screech effect is often less than ideal, often appears only some or even single microphone inhibition effect is good, the rest of the microphone in large volume, squealing voice has not been suppressed. So, the problem does occur where? we all know that, because of the structure and characteristics of the microphone, the microphone in different brands, impedance, frequency, nature and sensitivity of indicators is not consistent, even if the same brand of microphones in these targets also exist in different degrees of difference, plus the various branches of the microphone in the actual use of the use and placement of different factors, such as the objective branch of the microphone feedback whistling frequency is not in the same volume. If we use conventional method for FSK, often first occurred screech of the microphone will trigger a suppressor for point by point shift, the remaining number is not yet happening screech of the receiver has not been effectively shift. When a large, the microphone will still occur in Whistler, the suppressor is powerless. If we use multiple acoustic feedback suppressor use the Insert method, respectively, for each branch of the microphone by point shift, then these many issues can be resolved, this results in the improvement of the equipment cost. If you hold a comprehensive dance party, this configuration is in the installation and commissioning, second on the expenditure of time and is also in cost is not practical. In fact, the solution is very simple, as long as we use the correct debug methodology with a feedback suppressor can be more ideal frequency suppression effect. Here I would like to cite an example of the performance, detailed look at the debug (DT12B). In the show have a sketch show, at the same time need to receive clip microphone 8. 1, will determine the clip microphone 8 in a mixer on programming as a group, to the high, mid, bass-EQ and gain GAIN knob road are tuned in terms of location, and then take the secondary volume faders. 2, on the stage and microphone with the 8 concentrated in most prone to howl, and then placed in height from stage floor 1m around platforms. 3. in accordance with the General joins the PA system. Use the Insert method of the feedback suppressor (DT12B) Insert the 8-microphone group appropriate INSERT interface. 4 threaded in a mixer and amplifier between various peripheral equipment (including DT12Bd) are set in bypass and the equipment of both input and output knob at 0dB, amplifier decay knob setting in an intermediate position. 5, will be grouped on the microphone mixer faders and main output output faders are set at 0dB, through gain knob and auxiliary faders with between, respectively, on the road, the microphone for debugging. 6, the way the phone assisted volume faders to push slowly until stable squealing sound occurs. Remember the road faders on the DB, and then take the road of down, then faders for second road microphone debugging, and so on, until the 8-channel microphone is debugging a stable squealing voice. This step is very important, it takes patience to fine-tune. 7, the mixer faders on the primary output, down the tube Division restored faders in squealing voice to appear. 8, the acoustic feedback suppressor of bypass key recovery into work status, and select the single filter method S1, and then add the primary output of faders slowly pulling up. Question which calls after the suppressor will collate frequency of this 8-all squealing voice speaker Bate, until the suppressor on red filter indicator no longer flicker. 9. Finally press STORE storage key, used to select good storage roller, and then press the number keys to adjust the results STORE. 10, recover each peripheral equipment to the work of the State, the entire debugging work is completed. Through these debugging, this 8-lead clip microphone are stable work in the best condition, thus effectively deterred show very susceptible of acoustic feedback.