Free Audio Service Manuals - Free download shure m68p owners manual

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Grounding If there should be objectionable hum, connect the metal chassis of the mixer to a good ground such as a metal frame of a wall outlet or a water or steam pipe. This is normally accomplished automatically through the ground wire of the power cord. INPUT CONNECTIONS Microphones: A maximum of four high-impedance dynamic, ribbon, or condenser microphones may be connected to the standard Y4" phone jacks marked MIC. 1, MIC. 2, MIC. 3, MIC. 4. The microphone inputs may be converted for use with low-impedance micro- phones by utilizing accessory plug-in transformers Model A95 Series. The unit is not recommended for use with crystal or ceramic microphones. NOTE: Some condenser microphones produce very high output signals which may overload the input of a mixer. Auxiliary: The phono jack on the rear of the panel marked AUX. INPUT will accept output from a high- impedance, high-level source such as a tape recorder, AM-FM tuner, or output from the Model A68P Phono Preamplifier (accessory). The Model A68M Microphone Preamplifier (accessory) may be connected to this jack to provide a fifth microphone input. OUTPUT CONNECTIONS Low lmpedance Microphone: The receptacle marked LO IMP. MIC. OUTPUT is a low-impedance micro- phone level output. This output is the "mixed" output of all the input sources and is designed to work into a 25 to 600-ohm microphone line or into a low-imped- ance amplifier or tape recorder microphone input. The receptacle is a professional three-pin audio connector (male).? See Figure B for output receptacle connec- tions. SHIELD SLEEVE ----- TIP j \----- 2 ._-_-- d MIC. OUTPUT MIC. OUTPUT HIGH IMPEDANCE LOW IMPEDANCE (BALANCED LINE) Microphone Output Connections FIGURE B High lmpedance Microphone: The phone jack marked HI IMP. MIC. OUTPUT is a high-impedance microphone level output. This output is, also, the "mixed" output of all sources, designed to work into a high-impedance amplifier or tape recorder microphone input. See Figure B for output jack connections. NOTE: The high- and low-impedance microphone out- puts may be used simultaneously. Auxiliary: The phono jack marked AUX. OUTPUT is a high-impedance high-level output designed primarily to feed a power amplifier requiring 0.5 to 2 volts or the auxiliary or tuner input to an amplifier or tape recorder. This output will also drive the input of the Model M63 Audio Master. Accessory 28-volt dc: This rear panel jack marked ACCESSORY 28 V.D.C. provides 28 volts dc for ac- cessories such as the Model A68P Phono Preamplifier, Model A68M Microphone Preamplifier or M62V Level- Loc. The jack is also used as the power input when using the Model A67B Battery Power Supply (acces- sory) for battery operation of the M68P Mixer. ? Designed to mate with Cannon XL series, Switchcraft A3 (Q.G.) series or equivalent connector. [Shure part 95A548 (female)]. OPERATION Power: Connect the Microphone Mixer power line cord to the proper ac power outlet. See Operating Voltage under Specifications. The M68P has a three-conductor cable with a three prong plug. Volume Controls: The MASTER gain control and the individual gain controls for each of the five channels are identified on the front panel. The individual gain controls should generally be set near maximum (fully clockwise) and the MASTER gain control adjusted to required output. Individual channel gain controls not being used should be kept at mini- mum gain (fully counterclockwise). Identifying Controls: Pressure sensitive adhesive labels are supplied with the Mixers as a means of identifying each control and recording that controls position when optimum results have been obtained. The labels are easily removed when their use is no longer required. CONNECTING TWO UNITS TOGETHER Two M68P Mixers may be combined to give a total of eight microphone channels plus an auxiliary input. A. Connect the AUX. OUTPUT of Unit 1 to the AUX. INPUT of Unit 2. 6. Connect microphones to mixers and set each mi- crophone input control to #O position. C. Take the output signal for recorder or P.A. amplifier from the appropriate output jack on Unit 2. D. Set MASTER control on Unit 1 to position #4. E. Set AUX. control on Unit 2 to position #lo. F. The MASTER control on Unit 2 is now the MASTER for all inputs. G. Advance MASTER control (Unit 2) to about #5 po- sition and adjust individual microphone controls for proper level. If overall gain is too low or too high the MASTER control (Unit 2) may be adjusted. H. If an input to the auxiliary channel is needed, such as for a tape recorder or tuner, use AUX. INPUT on Unit 1. Use AUX. control on Unit 1 for level adjust- ment of the auxiliary source. The master gain con- trol for the entire system is the MASTER control on Unit 2. The Model A68S Stacking Kit includes stacking brackets for attaching the two mixers firmly together plus the required inter-connecting cable. The cable only, is available separately under the Model A68SC. GUARANTEE This Shure product is guaranteed in normal use to be free from electrical and mechanical defects for a period of one year from the date of purchase. Please retain proof of purchase date. This guarantee includes all parts and labor. SHIPPING INSTRUCTIONS Carefully repack the unit and return it prepaid to the factory. If outside the United States, return the unit to your dealer or Authorized Shure Service Center for repair. The unit will be returned to you prepaid. OPTIONAL ACCESSORIES Battery Power Supply ......... .Model A67B Output Cable Kit .............. .Model A68C Locking Panel ................ .Model A68L Phono Preamp ................ .hlodel A68P Rack Panel Kit ................ .Model A68R Stacking Kit .................. .Model A68S ......... Interconnecting Cable .Model A68SC Attache Case ................. .Model AC60 Handle/Tilt Stand ............. .Model A67H Line Matching Transformer ..... .Model A95 Series Microphone Preamplifier ....... .Model A68M

Shure m68p owners manual

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