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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