Electro Voice Microphone CH230 User Manual

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  
quality.  
Assembly  
Description and Application  
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.  
Parts List:  
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.  
1 microphone with hanger and 30 ft of cable  
1 round plaster ring  
1 rectangular switch cover  
1 printed circuit board  
1 shield box  
1 strain relief  
2 11/4-in. #4-40 Phillips-head screws  
4 3/16-in. #4-40 Phillips-head screws  
2 1/2-in. #8-32 Phillips-head screws  
2 #4 split-ring washers  
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 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 reduced 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  
2 #4-40 hex-head nuts  
4 threaded spacers  
6 #4 fiber washers  
Tools Required:  
Medium-head (#2) Phillips screwdriver  
Small-blade screwdriver  
1/4-in. open-end wrench  
Assembly Instructions (see Figure 3):  
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.  
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  
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CH230/CH230W Condenser Cardioid Hanging Microphone  
Terminations to the electronics module shall  
be terminal blocks.  
at any time after repairs have 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 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.  
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 individual 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  
For 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 1—Frequency Response  
FIGURE 2—Polar Response  
3
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CH230/CH230W Condenser Cardioid Hanging Microphone  
FIGURE 4—Electronics Board and  
Wiring  
FIGURE 3—Assembly Drawing  
FIGURE 5—Hanging Microphone  
Placement  
FIGURE 6—3-to-1 Rule  
FIGURE 7—Live Theater Placement  
44  
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CH230/CH230W Condenser Cardioid Hanging Microphone  
Power Requirements:  
Specifications  
Dimensions,  
Transducer:  
12 to 52 V dc phantom supply  
Current Consumption:  
2.1 mA  
Generation Element:  
Condenser, back electret  
Frequency Response (see Figure 1):  
30 Hz to 20,000 Hz  
10.5 mm (0.4 in.) diameter,  
41.9 mm (1.65 in.) long  
Microphone Cable:  
9.1 m (30 ft) long  
Switchable High-Pass Filter,  
Corner Frequency:  
75 Hz  
Polar Pattern (see Figure 2):  
Cardioid  
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:  
Slope:  
Sensitivity,  
12 dB per octave  
Polarity:  
Open Circuit Voltage, 1 kHz:  
30 mV/pascal  
A positive pressure on the diaphragm  
produces a positive voltage on output  
pin 2  
Power Level, 1 kHz (0 dB = 1 mW/pas-  
cal):  
332 grams (11.7 oz)  
Shipping Weight:  
–21.7 dB  
Color,  
555 grams (19.6 oz)  
Clipping Level (1% THD):  
127 dB SPL  
CH230: Nonreflecting black  
CH230W: White  
Equivalent Noise:  
22 dB SPL A weighted  
Dynamic Range:  
105 dB  
Environmental Conditions,  
Relative Humidity 0–50%:  
–29° to 74° C (–20° to 165° F)  
Relative Humidity 0–95%:  
–29° to 57° C (–25° to 135° F)  
Output Impedance, 1 kHz:  
150 ohms  
55  
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CH230/CH230W Condenser Cardioid Hanging Microphone  
600 Cecil Street, Buchanan, MI 49107  
616/695-6831, 616/695-1304 Fax  
MICROPHONES–Condenser Cardioid  
Part Number 532021 — 9941  
©EVI Audio 1999 • Litho in U.S.A.  
6
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