Electro-Voice CH230W User's Manual
Contents
1. 20 dB below the front re sponse at 1 0 kHz The microphone shall have an output power level of 21 7 dB where 0 dB 1 milliwatt per pascal and output shall not be appreciably affected by the following temperature and humidity ex tremes 29 to 74 C 20 to 165 F when relative humidity is 0 50 29 to 57 C 20 to 135 F when relative humidity is 0 95 The microphone shall have a nominal balanced output impedance of 150 ohms when connected to its electronics module The microphone shall have a low gloss black finish CH230 or a low gloss white finish CH230W The cable color shall match the transducer A switchable two pole high pass filter f 75 Hz shall be provided The transducer shall have a wire hanger for directing the microphone Dimensions the transducer shall be 10 5 mm 0 42 in wide and 41 9 mm 1 65 in long the cable shall be 9 1 m 30 ft long and 2 6 mm 0 106 in in diameter The electronics module shall fit into either a switch box or four inch electri cal box with a rectangular switch box plate and circular plaster ring cover provided CH 230 CH 230W Condenser Cardioid Hanging M icrophone Terminations to the electronics module shall be terminal blocks The Electro Voice model CH230 CH230W is specified Limited Warranty Electro Voice products are guaranteed against malfunction due to defects in mate rials or workmanship for a specified period as noted in the indivi2. Electro Voice Service at 600 Cecil Street Buchanan MI 49107 800 234 6831 or FAX 616 695 4743 Incidental and Consequential Damages Excluded Prod uct repair or replacement and return to the customer are the only remedies provided to the customer Electro Voice shall not be li able for any incidental or consequential dam ages including without limitation injury to persons or property or loss of use Some states do not allow the exclusion or limita tion of incidental or consequential damages so the above limitation or exclusion may not apply to you Other Rights This warranty gives you specific legal rights and you may also have other rights which vary from state to state Electro Voice Wired Microphones are guaranteed against malfunction from any cause for two 2 years from the date of origi nal purchase In addition the Limited War ranty for the acoustic system contained in these microphones shall apply for the life of the product defined as a period of ten 10 years from the date that the manufacture of the specific microphone has been discontin ued Any and all active electronics incorpo rated in these microphones are guaranteed against malfunction due to defects in mate rials or workmanship for a period of three 3 years from the date of original purchase The Limited Warranty does not extend to cables cable connectors or switches Addi tional details are included in the Uniform Limited Warranty statement For
3. size and na ture of the performing group Two general rules to observe for the best sound coverage are 1 microphone position and 2 the 3 to 1 rule The first rule is to suspend the microphone approximately two to three feet in front of the first row of performers and two to three feet higher than the heads of the last row of performers The microphones are usually aimed to point at the last row of performers Figure 5 The second rule the 3 to 1 rule should be applied when more than one microphone is required and their outputs are combined as with a mixer Following the 3 to 1 rule avoids the deep voids and dips in frequency response that occur when two or more mi crophones see the same signal from slightly different distances The 3 to 1 rule is as follows when multiple microphones are used place them at least three times as far apart as any one of them is from the nearest sound source Figure 6 shows a proper ap plication of the 3 to 1 rule The CH230 and CH230W may also be used to provide coverage for live theater applica tions Figure 7 Most of the action occurs at center stage so the microphone should be positioned above and pointed to the center of the stage Architects and Engineering Specifications The microphone shall be a back electret con denser type with a frequency response of 30 Hz to 20 kHz The microphone shall have a cardioid polar pattern with a rear response which is typically
4. warranty repair or service informa tion contact the service repair department at 616 695 6831 or 800 685 2606 For technical assistance contact Technical Support at 800 234 6831 or 616 695 6831 M F 8 00 a m to 5 00 p m Eastern Stan dard Time Specifications subject to change without notice FIGURE 2 Polar Response zag 506 Hz 1000 Hz 1590 aza 16 000 Hz prope MOEZHO OEZHO CH230 CH230W Condenser Cardioid Hanging Microphone CH 230 CH 230W Condenser Cardioid Hanging M icrophone FIGURE 3 Assembly Drawing ii SCREWS sea 1 104 SCREWS db STRAIN RELIEF MICROPHONE CABLE FIGURE 6 3 to 1 Rule OO OOTO OOOO DD Y E Nery ND FIGURE 4 Electronics Board and Wiring SWITCH BOX FIGURE 5 Hanging Microphone Placement FIGURE 7 Live Theater Placement 55 CH 230 CH 230W Condenser Cardioid Hanging M icrophone Specifications Generation Element Condenser back electret Freguency Response see Figure 1 30 Hz to 20 000 Hz Polar Pattern see Figure 2 Cardioid Sensitivity Open Circuit Voltage 1 kHz 30 mV pascal Power Level 1 kHz 0 dB 1 mW pas cal 21 7 dB Clipping Level 1 THD 127 dB SPL Equivalent Noise 22 dB SPL A weighted Dynamic Range 105 dB Output Imped
5. 4 in 4 40 Phillips head screws 2 in 8 32 Phillips head screws 2 4 split ring washers 2 4 40 hex head nuts 4 threaded spacers 6 4 fiber washers Tools Required Medium head 2 Phillips screwdriver Small blade screwdriver in open end wrench Assembly Instructions see Figure 3 1 Identify the type of electrical box switch or octagon and select the proper cover plate to start the assembly 2 Position the plate with the printed side CH230 CH230W Condenser Cardioid Hanging Microphone CH 230 CH 230W Condenser Cardioid Hanging M icrophone up with INPUT OUTPUT aligned as shown in Figure 3 Start the assembly by inserting the two 1 in screws into the up per left hand and lower right hand holes drop on the internal toothed lockwashers thread on the spacer and tighten against the plate with a wrench Repeat the procedure for the two in screws Place the fiber washer on each spacer 3 Position the printed circuit board with the larger terminal block and the transformer over the printed OUTPUT label Align the screw holes in the upper right and lower left corners of the printed circuit board with the two 17 in screws and push down until the board rests against the four fiber washers Take the remaining two in screws and two fiber washers and fasten the board to the plate 4 Determine the length of cable required before attaching the microphone cable to the printed circui
6. ElechoVojce memm gt CH230 CH230W Condenser Cardioid Hanging Microphones Available in black or white Braided cable shield maintains horizontal aiming even when temperature and humidity vary Preamp mounts in standard electrical boxes Steel preamp shield gives high resistance to electrical noise and rf interference Hum bucking output transformer cuts hum by more than 20 dB Screw type output terminals are reliable over the long term Description and Application The CH230 and CH230W hanging micro phones utilize back electret condenser tech nology to provide an extended flat frequency response with a controlled cardioid polar pat tern for high quality sound reinforcement The CH230 and CH230W were specifically designed to mic choirs instrumental and vocal groups and live theater The size and color black white of the transducer and cable allow the microphone to blend in with the surroundings The CH230 s low self noise and high output signal level combine to produce an excel lent signal to noise ratio Exceptionally high sensitivity a uniform cardioid polar response and smooth frequency response make the CH230 ideally suited for distant sound pick up The cardioid polar response is precisely controlled and is highly effec tive in suppressing feedback without colora tion of sound Additionally unwanted low frequency noise such as the rumble from air moving equipment can be reduce
7. ance 1 kHz 150 ohms Power Requirements 12 to 52 V dc phantom supply Current Consumption 2 1 mA Switchable High Pass Filter Corner Frequency 75 Hz Slope 12 dB per octave Polarity A positive pressure on the diaphragm produces a positive voltage on output pin 2 Color CH230 Nonreflecting black CH230W White Environmental Conditions Relative Humidity 0 50 29 to 74 20 to 165 F Relative Humidity 0 95 29 to 57 C 25 to 135 F Dimensions Transducer 10 5 mm 0 4 in diameter 41 9 mm 1 65 in long Microphone Cable 9 m 30 ft long Electronics Module 67 3 mm 2 65 in long 40 6 mm 1 6 in wide 30 5 mm 1 2 in high Net Weight 332 grams 11 7 oz Shipping Weight 555 grams 19 6 oz euoudoj5I N proipae MOEZHO OEZHO CH230 CH230W Condenser Cardioid Hanging Microphone CH 230 CH 230W Condenser Cardioid Hanging M icrophone ElectroVoice 600 Cecil Street Buchanan MI 49107 616 695 6831 616 695 1304 Fax MICROPHONES Condenser Cardioid OEVI Audio 1999 Litho in U S A Part Number 532021 9941
8. d The rolloff filter is a two pole 12 dB per octave high pass with a corner fre quency of 75 Hz 8 Position the shield box with the slotted end over the mixer cable and the screw holes over the two 1 in screws Push down the shield box over the circuit board until the shield is sitting on the plate Inspect the mixer cable connection for any shorts of terminals 2 or 3 to the shield box With the wrench fasten the shield box to the plate with the two split ring washers and the two hex nuts 9 Gently push the assembly into the wallbox and fasten the assembly in place with the two remaining in 8 32 screws 10 To orient the microphone in the proper direction loosen the holding nut on the back of the microphone and slightly twist the mi crophone on the wire holder clockwise ro tation moves the microphone to the left counterclockwise rotation moves the micro phone to the right Tighten the holding nut Note for fixed installations allow the mi crophone cable to hang for at least 24 hours so the cable can completely relax and estab lish a set Bend the hanger wire to position the microphone in the vertical plane Application Notes When hanging one or more microphones to provide coverage for a choir instrumental or theater group the best microphone posi tion for optimum sound quality and feedback control depends on many factors sound system characteristics construction of the auditorium or theater and the
9. d with the use of a switchable high pass filter The filter s corner frequency 75 Hz is low enough to have essentially no effect on voice quality The CH230 and CH230W are easily aimed at the performance with the supplied steel wire hanger and holding nut The wire hanger attached to the microphone element and cable can be bent to aim the microphone in the vertical plane The horizontal position ing of the microphone is accomplished by rotating the element and locking the posi tion with the nut detailed description later This allows the microphone to be accurately positioned over a choir stage or orchestra The CH230 and CH230W are furnished with 30 feet of black CH230 or white CH230W miniature braided shielded cable The design of the cable ensures the microphone s horizontal position will be held stable without the need of fish line tether ing The CH230 s electronics module and mount ing hardware allow quick assembly and mounting to a standard electrical switch box or four inch electrical box Figure 3 illus trates the assembly for either box style Con necting a mixer to the electronics module is through the output terminal block Power is obtained from any phantom source supply ing 12 to 52 volts Assembly Parts List 1 microphone with hanger and 30 ft of cable 1 round plaster ring rectangular switch cover 1 printed circuit board 1 shield box 1 strain relief 2 1 in 4 40 Phillips head screws
10. dual product line statement s below or in the individual prod uct data sheet or owner s manual beginning with the date of original purchase If such malfunction occurs during the specified pe riod the product will be repaired or replaced at our option without charge The product will be returned to the customer prepaid Ex clusions and Limitations The Limited Warranty does not apply to a exterior fin ish or appearance b certain specific items described in the individual product line statement s below or in the individual prod uct data sheet or owner s manual c mal function resulting from use or operation of the product other than as specified in the product data sheet or owner s manual d malfunction resulting from misuse or abuse of the product or e malfunction occurring FIGURE 1 Frequency Response ea KAAT cl a LE LEE LLLI I ES at time after repairs been made to the product by anyone other than Electro Voice Service or any of its authorized ser vice representatives Obtaining Warranty Service To obtain warranty service a cus tomer must deliver the product prepaid to Electro Voice Service or any of its autho rized service representatives together with proof of purchase of the product in the form of a bill of sale or receipted invoice A list of authorized service representatives is avail able from
11. t board If the cable must be trimmed measure the length and add three inches Trim the cable by removing about 1 in of the outside jacket then separate the shield from the red and white wires Strip in of insulation from the red and white wires Push the bare wire ends of mi crophone cable through the center hole in the plate and the circuit board then insert the wires into the INPUT terminal block Follow the label instructions printed on the plate With the small blade screwdriver tighten the screws in the terminal block 5 Use the strain relief to fasten the micro phone cable to the plate by capturing the cable about YA in from the front of the plate then orient the flats of the strain relief with the flats of the center hole and sgueeze and push the strain relief into the center hole The strain relief will lock into place 6 To attach the mixer cable to the circuit board trim 1 in of insulation from the cable wires and insert the wires into the OUT PUT terminal block Follow the label in structions and insert the cable shield into SHLD GND and the remaining wires into terminals 2 and 3 Warning the CH230 and CH230W have terminal 2 positive with a positive pressure on the diaphragm so be aware of possible phasing problems if the wires for terminals 2 and 3 are reversed Tighten the terminal block screws with a small blade screwdriver 7 Set the roll off switch to the position desire
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