B 29L
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.
Specifications
Power supply:
9 V-Alkaline Block
Current consumption: max. 10 mA
Battery Life:
50 h +/- 5 h
Input channels
(Mini XLR-F):
2
Features
Max. Input level:
Input impedance:
Input attenuator:
Output:
0 dBV
5 k ohm
-50 dB
• Powers one or two MicroMic
Series III condenser L-version
microphones
XLR-M phantom power protected
(max. 55 VDC)
• Provides gain control for each
microphone
• On/Off switch with LED status
indicator
• Standard XLR male output
connector
• Output level mic/line selector
switch
Max. output level:
0 dBV +/- 1 dB @ k < 1% and Ubat
= 9 V
Output impedance:
Gain MIC:
typ. 200 ohm unbalanced
0 dB +/- 1 dB
Gain LINE:
40 dB +/- 2 dB
<8 uV (A)
Noise MIC:
Frequency response: 20 to 20 kHz
Temperature range:
Humidity:
-32° F - 140° F (0° C - 60° C)
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)
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