AKG Acoustics B 29L User Manual

B 29 L

Power Supply and Mini-Mixer for MicroMic III Series

Description

The B 29 L is a small portable power supply/mixer that
accommodates two microphones in the MicroMic III series
(except the D 409 L which needs no power supply). Each
input has a gain control for balancing output levels. The
device is supplied with a clip that fastens it to a belt or guitar
strap. It uses a single 9-volt battery, providing an average life
of 50 hours. The output of the B 29 L can be switched either
to mic or line output level, depending on the downstream
requirement. Both inputs to the B 29 L are mini-XLR-F, and
the output is a standard XLR-M.

The B 29 L effectively makes one output out of two. It is
indispensible with small mixers, where it can expand the
number of available inputs. In addition, many small mixers do
not have phantom powering. The B 29 L offers an attractive
solution for this problem.

Features

• Powers one or two MicroMic
Series III condenser L-version
microphones

• Provides gain control for each
microphone

• On/Off switch with LED status
indicator

• Standard XLR male output
connector

• Output level mic/line selector
switch

Specifications

Power supply: 9 V-Alkaline Block

Current consumption: max. 10 mA

Battery Life: 50 h +/- 5 h

Input channels
(Mini XLR-F): 2

Max. Input level: 0 dBV

Input impedance: 5 k ohm

Input attenuator: -50 dB

Output: XLR-M phantom power protected

(max. 55 VDC)

Max. output level: 0 dBV +/- 1 dB @ k < 1% and Ubat

= 9 V

Output impedance: typ. 200 ohm unbalanced

Gain MIC: 0 dB +/- 1 dB

Gain LINE: 40 dB +/- 2 dB

Noise MIC: <8 uV (A)

Frequency response: 20 to 20 kHz

Temperature range: -32° F - 140° F (0° C - 60° C)

Humidity: 93% @ 140° F (40° C)

Size (W x D x H): 3.7 in. x 2.6 in. x 1.1 in.

(94 x 67 x 27mm)

Weight incl. batteries: 4.8 oz. (135g)

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

The power supply/mixer shall be battery operated and occupy a
physical envelope no greater than 3.7 in. x 2.6 in. x 1.1 in.
(94 mm x 67 mm x 27 mm). The net weight of the unit shall be no
greater than 4.8 oz. (135 g) including battery. The power
supply/mixer shall have a frequency response of 20 to 20 kHz. The
power supply/mixer shall be powered by a 9V alkaline battery for at
least 50 hours (+/- 5 hours). The power supply/mixer shall have the

following controls and indicators: power on-off switch and LED
power indicator, independent volume control for each channel. Left
and right channel inputs provided by three-pin male mini-XLR
jacks. The power supply/mixer shall provide microphone or line
level input through a single XLR output jack. The power
supply/mixer shall be the AKG Acoustics Model B 29 L.

Graphical Data

Architects and Engineers Specifications

2.6” (66.5 mm)

3.7”

(94 mm)

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

DS-B 29 L