CM311 A CM311 AESH CM311 L
Contents
1. Fig 1 Fig 2 Freguency Response Polar Response 415 410 z 45 0 1 375 dBO A 7 300 K _ 60 5 Sse id 10 H gt id ae 270 pi ae 20 z e N 25 ul 4 4 20 k 35 TEErp m0 Niz 20 100 1K 10K 20K Asan 4 6000 Hz Frequency in Hz REAR N 210 180 150 Fig 3 Fig 4 HEADBANE TOP VIEW 1 06 in 2 7 cm BOOM BLOCK MIC a 5 5 in 12 67 emi SIDE VIEW WIRE FRAME S EARPIECE x THUMESGREW N AND BLOCK N REMOVEABLE Tin N WINDSCREEN AZB em N RETAINING RING ha 4 in bw F i762 em 2 593 n 6 6 cm 3 745 in 9 5 cm i 680 n 4 17 cm Fig 5 EARPIESE HEADBAND WIRE FOAM BLOLK WIRE BUUNI FOAR ELK THURIBSUREW DE AIL _ THRIVE Mi UP OR DOW TO MOVE Mls IN UR UUT 0 MOVE MIG LEF OR RIGHT 3 Now bend the headband wire to fit your head Put the foam block wire behind your ear Then you can bend the earpieces to fit snugly around your ears The back of the headband should fit firmly against the back of your neck 4 Next adjust the foam pad snug against your head or neck To do this bend the wire that goes into the foam block CAUTION Do not bend the boom itself just the foam block wire A snug fit of the foam pad pre vents boom bounce when you move around 5 Be sure that the thumbscrew is still loos ened a little Move the boom in or out and left o2. 9 V DC internal alkaline battery or 18 48 V phantom power CM311 AESH and CM311 L 3 9 V DC from the transmitter s battery Polarity Positive pressure on diaphragm produces positive voltage on CM311 A XLR pin 2 with respect to pin 3 and on CM 311 AESH and CM311 L shield with respect to white lead Current drain CM311 A 6 5 mA nominal CM311 AESH and CM311 L 0 27 mA nominal Battery life CM311 A 85 hours CM311 AESH and CM311 L approximately equal to transmitter battery life Off attenuation 70 dB Output connectors CM311 A 3 pin pro audio XLR type CM311 AESH TA4F for Shure wireless systems CM311 L 3 pin mini XLR Materials High impact plastic mic housing brass boom steel wire headband high impact plastic and steel battery pack Finish Satin black Net weight Head worn mic 2 1 oz 61 g CM311 A belt pack and battery 6 1 oz 173g Dimensions Headband 5 5 inch 13 97 cm diameter adjustable Boom approximately 7 inch 17 78 cm x 3 inch 7 62 cm See Figs 3 and 4 Included accessories Microphone carrying case WS 6 foam pop filter clothing clip Optional accessories PH 4B phantom power supply 4 channels AC powered PH 1A phantom power supply 1 channel battery or AC adapter powered WS 14 accessory windscreen 1 pascal 10 dynes cm 10 microbars 94 dB SPL
3. 20 dB down at the rear null The AKG Crown model CM311 A is specified Microphone Warranty AKG Crown professional microphones are guaranteed unconditionally o against malfunction from any cause for a period of ihree years from date of original purchase See enclosed warranty sheet for additional information Service If the microphone does not function prop erly check that it is aimed correctly and is connected as described in this data sheet If you determine that the microphone product is defective return the complete product in its original packaging to one of the addresses below For further assistance or technical support call the international helpdesk at 43 676 83200 888 CM311A CM311 AESH CM311 L GRN W7 1 014 R27 SHIELD WB We wa 013 MISHOPR ONE FLPSTRIR SS CM311 A Schematic AKG ACOUSTICS GMBH LAXENBURGER STRASSE 254 1230 VIENNA AUSTRIA aA AKG ACOUSTICS U S SERVICE 24950 GROVE VIEW ROAD MORENO VALLEY CA 92551 U S A 2015 HARMAN International Industries Incorporated All rights reserved AKG is a trademark of AKG Acoustics GmbH registered in the United States and or other countries Features specifications and appearance are subject to change without notice www akg com
4. CM311A CM311 AESH CM311 L Dis for touring and live sound applications the AKG Crown CM311 is a rugged head worn microphone with unequalled performance It sounds like the best handheld microphones full clear and distortion free even with the loudest singers The CM311 is the latest version of the AKG Crown s proprietary Differoid technology lts cardioid pickup pattern rejects sounds from the rear such as floor monitors Its noise cancelling ability rejects sounds at a distance such as instruments on stage and crowd noise This results in the CM311 having outstanding gain before feedback and isolation Lightweight and comfortable the mic s headband and boom adjust to fit any singer An included pop filter greatly reduces breath noise and pops Because of the boom s unique behind the ear design it does not cover up the singer s face Three models are available CM311 A CM311 AESH and CM311 L The CM311 A is powered by a 9 V battery or phantom power It has a battery belt pack with an on off switch a programmable mic on off switch and a Mic On LED The CM311 AESH has a T4AF connector allowing you to connect with Shure wireless systems The L version offers a 3 pin mini XLR output which fits all AKG wireless body pack transmitters How to adjust for best fit and to prevent boom bounce Note To get the maximum performance out of this microphone take the time to adjust it to fit correctly F
5. itch The mic on off switch can be programmed to work in three ways Push on push off Momentary on Momentary off as supplied To change the switch operation open the belt pack case by removing the three screws Set the switch as shown below TO XLA PUSH ONS MOM OFF MOM ON PUSH OFF COUGH P T T The LED lights when the mic is on Architects and Engineers Specifications The microphone shall be the AKG Crown Model CM311 A or equivalent The microphone shall be a head worn noise cancelling cardioid type of electret condenser design The microphone shall exhibit excellent off axis response and gain before feedback The microphone shall have an adjustable headband adjustable boom with locking thumbscrew and foam pop filter Model CM311 A shall include a battery belt pack In the CM311 A a 42 inch permanently attached Oo two conductor shielded cable shall connect the micro phone to the belt pack The belt pack shall include a 3 pin pro audio XLR type con nector Model CM311 A shall be powered by a 9 V battery in the belt pack or by 18 to 48 V phantom power The belt pack shall have a battery on off switch a programmable mic on off switch and a Mic On LED Nominal open circuit sensitivity shall be 4 or 1 25 mV Pa Maximum SPL shall be 148 dB SPL for 3 THD Equivalent noise shall be 27 dBA nominal Frequency response shall be 50 Hz to 17 000 Hz with a uniform off axis response over
6. or best results the CM311 A MUST be custom fitted to a single user s head This simple procedure takes only a few minutes Please refer to Fig 5 and locate the parts described 1 If the microphone is for yourself we suggest that you use a mirror to double check the fit as you make adjustments 2 Loosen just a little the thumbscrew located on the outside of the foam block part way back on the boom This allows the boom to slide in and out and to rotate left and right DIFFEROID HEAD WORN CONDENSER MICROPHONE OAKG by HARMAN s Specifications Transducer type Electret condenser Frequency response typical 50 Hz to 17 000 Hz see Fig 1 Polar pattern Cardioid see Fig 2 Impedance CM311 A 75 ohms balanced CM311 AESH and CM311 L 6kilohms unbalanced Recommended load impedance CM311 A 1000 ohms or greater CM311 AESH and CM311 L 10 kilohms Open circuit sensitivity typical close talking CM311 A 4 mV Pa 48 dB re 1V Pa CM311 AESH and CM311 L 1 25 mV Pa 58 dB re 1V Pa Power sensitivity typical close talking CM311 A 42 5 dB re 1 mW Pa CM311 AESH and CM311 L 71 5 dB re 1 mW Pa Equivalent noise level self noise 26 dB SPL typical 0 dB 0 0002 dyne cm A weighted S N ratio 68 dB at 94 dB SPL Maximum SPL CM311 A 148 dB SPL produces 3 THD CM311 AESH and CM311 L 140 dB SPL with 3V DC 148 dB SPL with 9V DC Operating voltage CM311 A
7. r right to center the mic directly in front of your lips The foam pop filter should press firmly against the lips This is necessary because the mic cancels sounds that are not close to it Also it keeps the boom from bouncing Tighten the thumbscrew and you re done Once you ve adjusted the headset it should remain in that position no further adjust ments are needed You can still swing the mic up or down away from your lips if you don t want to be heard on the P A or use the mic on off switch programmed for press off operation After several hours of use the foam pop filter can become clogged with moisture giving a muffled sound Periodically wash it in mild detergent and water The foam pop filter is held in place by a removable ring Additional WS 6 pop filters can be ordered from AKG s Parts Department How to insert a battery in the CM311 A belt pack 1 Access the battery by sliding open the battery cover 2 Insert a fresh 9V alkaline battery Mallory Duracell MN9100 or eguivalent into the battery tray The battery cover shows the correct polarity 3 Replace the battery cover To prolong battery life turn off the battery switch when not in use If you re using phantom power and the battery switch is on the battery will take over automatically if phantom power fails After 85 hours of use or if the sound is distorted it s time to replace the battery How to program the mic on off sw
Download Pdf Manuals
Related Search