Models M610 and M610-2E - Shure

Wm*g01000 l0,oOO 20,000FREQUENCY (HZ)FIGURE 4-1 -EACH FILTER AT 6 dB ATTENUATION:-10Y2 -15 L I2 4 6 8 1 2 4 6 8 1 2 4 6 8 1 2J 20 100 1000 lO.000 eopooEFIGURE 4-2-FREQUENCY (HZ)EACH FILTER AT MAXIMUM ATTENUATIONINDIVIDUAL OCTAVE FILTER FREQUENCYCHARACTERISTIC (TYPICAL)FIGURE 4OPERATION1. Connect line cord to ac power source or use A67BBattery Power Supply.Set panel controls as follows:On-Off slide switch (14) to ON position.Mode slide switch (11) to BYPASS position.Below 63 (1) and Above 8K (10) slide switch toflat (up) position.All eight Filter Frequency controls (2)-(9) to full upposition.Filter Level control (12) to zero (fully counterclockwise).2. Adjust the amplifier gain of the sound system (usingthe preamplifier/mixer or power amplifier volumecontrol) until feedback becomes apparent. Reducethe gain setting until it is comfortably belowthe feedback level.3. Set Mode slide switch (11) to FILTER position. IncreaseFilter Level control (12) until feedbacksqueal or ringing is heard.4. If the feedback sound is high pitched, one of thefour high-frequency Filter Frequency controls (1kHz through 8 kHz) (6)-(9) will be most effectivein eliminating the feedback. Individually move eachFilter Frequency control slowly from top to bottomand back to top while listening for feedback. Thecontrol which eliminates feedback with the leastmotion should then be moved down only so far asnecessary to eliminate the feedback.5. If the feedback frequency happens to fall betweenthe bands covered by two adjacent controls, then itmay be necessary to move down both controls toobtain the desired feedback suppression.6. If the feedback sound first noted in step 4 is of alow frequency, then the adjustment procedureshould be started using the low-frequency (63 Hzthrough 500 Hz) Filter Frequency controls (2)-(5).7. Having eliminated the first feedback condition, increasethe gain of the sound system with theFilter Level control (12) until feedback is againnoted. Repeat the procedures of the precedingsteps 3 through 6 to eliminate the new feedbackcondition. This may require adjustment of a differentFilter Frequency control or may require afurther decrease in the control or controls previouslymoved down.8. Repeat step 7 until either (A), one or more FilterFrequency controls has been set to maximum attenuation,or (B), feedback appears to occur at morethan one frequency simultaneously. Do not reducethe setting of any Filter Frequency controls morethan necessary to stop ringing or squealing duringthe above procedure.9. Conduct a talk test through the sound system withthe Mode switch set to FILTER and listen forringing. If ringing is noted, attempt to eliminate itby a slight decrease in the setting of the Filter Levelcontrol or further decrease in the appropriate FilterFrequency control setting.10. During the above procedure, it will not usually benecessary to set either the Below 63 or Above 8Kswitches to the down position to eliminate feedbackunless the pitch of the feedback is extremely lowor extremely high. These switches are primarily intendedfor improving overall sound quality or tonalbalance, if necessary. After feedback has beeneliminated as outlined above, actuate each switchand note the tonal character of the system duringthe talk test. It will usually be advantageous to actuatethe Below 63 switch if the 63 Hz Filter Frequencycontrol is set below 6, and to actuate theAbove 8K switch if the 8 kHz Filter Frequency controlis set below 6.650"7 W02, -5W-''2 4 6 8 1 2 4 6 0 1 2 4 6 8 1 2$ 20 100 1000 lop00 20,000_IFREQUENCY (HZ)W LLBELOW 63 AND ABOVE 8K FILTER FREQUENCY CHARACTERISTICS(TYPICAL)FIGURE 5WARNINGVoltages in this equipment are hazardous to life.Refer servicing to qualified service personnel.OPTIONAL ACCESSORIESLocking Panel ....................... .Model A68LRack Panel Kit ...................... .Model A68RGUARANTEEThis Shure product is guaranteed in normal use tobe free from electrical and mechanioal defects for aperiod of one year from date of purchase. Pleaseretain proof of purchase date. This guarantee includesall parts and labor. This guarantee is in lieu of anyand all other guarantees or warranties, express orimplied, and there shall be no recovery for any consequentialor incidental damages.SHIPPING INSTRUCTIONSCarefully repack the unit and return it prepaid to:Shure Brothers IncorporatedAttention: Service Department1501 West Shure DriveArlington Heights, Illinois 60004If outside the United States, return the unit to yourdealer or Authorized Shure Service Center for repair.The unit will be returned to you prepaid.