AKG Acoustics CK 31 User Manual

CK 31

Capsule Module

Description

The CK 31 is a cardioid modular screw-on capsule with
smooth response from 50 Hz to 20 kHz. All 30-series
capsules feature pre-polarized condenser elements with gold
plated contacts to ensure reliable connections and trouble­free performance. The CK 31 capsule can be used with any of
the “Discreet Acoustics Modular Series” installation modules.
Each 30-series capsule has a dual layer windscreen; the dark
gray outer layer disperses the impinging air stream while the
inside layer smoothes the air stream before it reaches the
diaphragm. This two-stage process efficiently reduces wind
noise while maintaining acoustic transparency.

Features

• Cardioid pickup pattern

• Wide frequency range

• Screw on capsule

• Gold plated contacts

• High performance windscreen

Specifications

Transducer Principle: Condenser prepolarized

Frequency Range: 50–20,000 Hz

Polar Pattern: Cardioid

Sensitivity at 1,000 Hz: 20 mV/Pa = -34 dBV

Equivalent Noise Level: < 21 dB-A

Sound Pressure Level for 1% THD: 125 dB

S/N Ratio (A-weighted) :> 73 dB

Electr. Impedance: < 600 ohms

Power Requirement: 9 to 52 volts phantom power,

requires DPA adapter
(incl. in GN or HM modules)

Finish: Dark gray matte

Size: dia.: 0.5 in. (13.5 mm)

length: 0.8 in. (20 mm)

Fitting Mounting Modules:

GN 15, GN 15 E, GN 15 ES
GN 30, GN 30 E, GN 30 ES
GN 50, GN 50 E, GN 50 ES
GN 155 SET, HM 1000, LM 3, LM 3 L

Included Accessories: W 30 Two stage foam windscreen

Microphones · Headphones · Wireless Microphones · Wireless Headphones · Headsets · Electroacoustical Components

Limited Warranty

Valid only in the United States. AKG Acoustics warrants AKG products against defects in material
or workmanship for a period of two years from the date of original purchase for use, and agrees to
repair or, at our option, replace any defective unit without charge for either parts or labor. Important:
This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable
care, the affixing of any attachment not provided with the product, loss of parts or connecting the
product to any but the specified receptacles. This warranty is void unless service or repairs are
performed by an authorized service center. No responsibility is assumed for any special, incidental

or consequential damages. However, the limitation of any right or remedy shall not be effective
where such is prohibited or restricted by law. Simply take or ship your AKG product prepaid to our
service department. Be sure to include your sales slip as proof of purchase date. (We will not repair
transit damage under the no-charge terms of this warranty.) Note: No other warranty, written or oral
is authorized by AKG Acoustics, Inc. This warranty gives you specific legal rights, and you may also
have other rights which vary from state to state. Some states do not allow the exclusion or
limitation of incidental or consequential damages or limitation on how long an implied warranty
lasts, so the above exclusions and limitation may not apply to you.

Specifications subject to change without notice.

AKG Acoustics GmbH

Lemböckgasse 21–25, P.O.B. 158, A-1230
Vienna/AUSTRIA
Tel: [phone]*, Fax: [phone]
Internet: http://www.akg.com

AKG Acoustics; A Division of Harman Pro Germany
Bodenseestraße 228, D-81243 München/GERMANY
Tel: [phone], Fax: [phone]

Arbiter Pro Audio

Wilberforce Road, London NW9 6AX/ENGLAND
Tel: [phone], Fax: [phone]

AKG ACOUSTICS, U.S.

914 Airpark Center Drive
Nashville, TN 37217, U.S.A.
Tel: [phone], Fax: [phone]

Studer Japan Ltd.

2-43-7, Uehara, Shibuya-ku, Tokyo 151-0064/JAPAN
Tel: [phone], Fax: [phone]

Erikson Pro Audio

620 McCaffrey, St-Laurent, Quebec, H4T 1N1, CANADA
Tel: [phone], Fax: [phone]
Internet: www.jam-ind.com/eriksonpro

AKG is constantly improving and modifying its products, therefore, specifications are subject to change without notice.

The microphone shall be a screw-on cardioid capsule that
mates with the AKG Discreet Acoustics Modular Series. The
microphone shall accept phantom powering over the universal
range from 9 to 52 volts dc. The response of the microphone
shall be flat on-axis from 150 Hz to 10 kHz (±2 dB), with a low
frequency roll-off below 150 Hz that reaches -10 dB at 50 Hz,
and response at 20 kHz that is no more than -4 dB, relative to
the midband response. The microphone shall have a sensitivity

no less than 20 mV/Pa (-34 dBV), and the total harmonic
distortion (THD) at an operating acoustical level of 125 dB shall
be no greater than 1%. The electrical impedance of the
microphone shall be no greater than 600 ohms. Electrical mating
contacts for mounting the microphone shall be gold plated for
positive, trouble free operation over long periods. The
microphone shall be the AKG Acoustics Model CK 31.

Graphical Data

Architects and Engineers Specifications

DS-CK 31

0.8 in. (20 mm)
length

0.5 in.

(13.5 mm)

diameter