Beyerdynamic Classis GM 301 Specifications

OPTIONAL ACCESSORIES

ZSH 301.18 Miniature mounting kit

for Classis GM 301 gooseneck
microphone for remote
installation of CVE 301.18
power supply or connection
to beltpack transmitters of
the Opus wireless series, cable

length approx. 140 cm . . . . . . . Order # 722.510

COMPONENTS

Classis GM 301 Set consisting of:

supercardioid Classis GM 301
miniature condenser microphone,
black, incl. wind shield and
CVE 301.18 power supply with

cover cap . . . . . . . . . . . . . . . Order # 489.336

Classis GM 301.18 Supercardioid miniature

condenser microphone, black,
with 4-pin female mini
XLR connection, incl.

wind shield . . . . . . . . . . . . . . Order # 489.328

TECHNICAL SPECIFICATIONS

Transducer type . . . . . . . . . . . . . . . . . . . Condenser

(back electret)

Operating principle . . . . . . . . . . . . . . . . . Pressure gradient

Frequency response . . . . . . . . . . . . . . . . 50 - 19,000 Hz

Polar pattern. . . . . . . . . . . . . . . . . . . . . . Supercardioid

Open circuit voltage at 1 kHz . . . . . . . . . 17 mV/Pa

Nominal impedance . . . . . . . . . . . . . . . . < 200 Ω

Load impedance . . . . . . . . . . . . . . . . . . . ≥ 1 kΩ

S/N ratio rel. to 1 Pa / noise voltage . . . . 69 dB [A] / 6.0 µV [A]

Equivalent SPL . . . . . . . . . . . . . . . . . . . . 25 dB [A]

Sound pressure level . . . . . . . . . . . . . . . . 107 dB [SPL @ 1% THD]

Supply voltage . . . . . . . . . . . . . . . . . . . . 8 - 52 V phantom

power

Power consumption . . . . . . . . . . . . . . . . 2.0 mA

Connection. . . . . . . . . . . . . . . . . . . . . . . 4-pin female mini XLR

Dimensions

Length . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mm

Head diameter . . . . . . . . . . . . . . . . . . . . 11 mm

Weight:

GM 301.18. . . . . . . . . . . . . . . . . . . . . . . 24 g

CVE 301.18 . . . . . . . . . . . . . . . . . . . . . . 72 g

GM 301 (Set) . . . . . . . . . . . . . . . . . . . . . 96 g

APPLICATIONS

The GM 301 has specially been designed for the installation into
tables or desks and is suitable for use in discussions and tele/video
conferences. The 85 mm long gooseneck is provided with a 4-pin
female mini XLR connection to connect the microphone to the
CVE 301.18 power supply which can be installed into tables or
desks and provides a protection against mechanical vibration. If the
microphone is not connected, the connection of the CVE 301.18
can be covered with the included covering cap. The GM 301 can
also be connected directly to a beltpack transmitter of the Opus
wireless systems series and is therefore ideal for lecture rooms,
forum discussions or presentations.
The Classis GM 301 microphone features the innovative Scudio™
technology, making the microphone absolutely insensitive to wire­less communication devices such as mobile phones.

FEATURES

• RFI-proof due to Scudio™ technology

• Supercardioid polar pattern

• High gain-before-feedback

• Flat, wide range frequency response

• High-quality reproduction of speech

• Flexible gooseneck for optimum positioning

• Unobtrusive design

Classis GM 301

Gooseneck Microphone

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 204
[e-mail] | www.beyerdynamic.com

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E4 / GM 301 (05.11)

1 of 3

FREQUENCY RESPONSE & POLAR PATTERN

This frequency response curve (measuring tolerance ± 2.5 dB) and polar pattern correspond to a typical production sample for this microphone.

Frequency response curve ± 2.5 dB 0 dB 17 mV/Pa GM 301

=

^

Classis GM 301

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 204
[e-mail] | www.beyerdynamic.com

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E4 / GM 301 (05.11)

2 of 3

WIRING DIAGRAM

br = braun / brown / brun
rt = rot / red / rouge
ws = weiß / white / blanc
Sch = Schirm / shield / écran

Classis GM 301.18

CVE 301.18