2
OPERATION OF MX1BP PREAMPLIFIER
(Figure 3, page 2)
1.
With the Mic Mute/On switch in the Mute position, plug the mi-
crophone into the preamplifier's miniature connector.
(NOTE: The Power LED Indicator will remain lit in both the Mute
and On microphone modes.)
2.
Plug the XLR cable from the preamplifier into the respective
audio device microphone input.
3.
Switch the Mic Mute/On switch to the On position.
4.
Adjust the gain level of the audio input device, if necessary.
FIGURE 3
INTERNAL LOW-CUT FILTER
The MXIBP has an internal low-cut filter. As shipped from the fac-
tory, it attenuates 6dB per octave below 25 Hz. To change the filter
to attenuate 12dB per octave below 95 Hz, follow the instructions
below:
1. Remove the three screws from the underside of the MX1BP.
2. Remove the plastic cover and lift the printed circuit board with
the attached faceplate up and out of the pack.
3. Turn over the printed circuit board and locate the jumper strad-
dling the first and second pins nearest the input jack. Reposi-
tion the jumper to straddle the second and third pins.
4. Re-assemble the MX1BP by re-seating the printed circuit
board and faceplate. Replace the plastic cover and the three
screws.
For additional technical assistance, phone Shure at
1-847-600-8440. In Europe, phone 49-7131-72140.
USE WITH PHANTOM POWER
The MX1BP can also be used in situations where phantom power
is available. Phantom power may be applied with a 9 V battery in
place or removed. With the battery installed, the MX1BP will si-
lently and automatically switch to the battery reserve should phan-
tom power fail. Battery depletion will not occur while phantom pow-
er is applied.
CHANGING CARTRIDGES
The MX183BP, MX184BP, and MX185BP microphone systems
use interchangeable cartridges. To remove the cartridge, un-
screw it from the microphone body (see Figure 1). Install the re-
placement cartridge by screwing it onto the microphone body.
SPECIFICATIONS
These specifications apply only to MX180 series microphones
when used with the supplied MX1BP preamplifier.
Type
Condenser (electret bias)
Frequency Response (Figure 4)
50 to 17,000 Hz
Polar Pattern (Figure 5)
MX183BP: Omnidirectional
MX184BP: Supercardioid
MX185BP: Cardioid
Polarity
Positive sound pressure on diaphragm produces positive voltage on
pin 2 relative to pin 3 of output XLR connector.
Environmental Conditions
Operating Temperature Range: -18
o
to
57
o
C (0
o
to 135
o
F)
Storage Temperature Range: -29
o
to 74
o
C (-20
o
to 165
o
F)
Microphone Cable
Shielded 1.2 m (4 ft.) cable terminated with a 4-pin female mini
connector (TA4F).
Output Impedance (at 1kHz)
EIA rated at 150
Ω
(
115
Ω
actual)
Open Circuit Sensitivity (at 1 kHz, ref. 1V/pascal*)
MX183BP: -46.5 dB (4.7 mV)
MX184BP: -52.5 dB (2.4 mV)
MX185BP: -54 dB (2.0 mV)
*
1 pascal = 94 dB SPL
Maximum Sound Pressure Level (1kHz at 1% THD,
1 k
Ω
load)
MX183BP: 132.8 dB
MX184BP: 138.8 dB
MX185BP: 140.3 dB
Equivalent Output Noise (A-weighted, with 1 k
Ω
load)
MX183BP: 23.7 dB SPL
MX184BP: 29.7 dB SPL
MX185BP: 31.2 dB SPL
Signal to Noise Ratio (ref. at 94 dB SPL at 1 k
Hz,
with
1 k
Ω
load)
MX183BP: 70.3 dB
MX184BP: 64.3 dB
MX185BP: 62.8 dB
Dynamic Range (with 1 k
Ω
load, at 1 KHz)
109.1 dB
Common Mode Rejection
45.0 dB minimum, 10 Hz to 100 kHz
Low Frequency Rolloff
Factory default: 6 dB per octave below 25 Hz
Alternate setting: 12 dB per octave below 95 Hz
MX1BP Net Weight
255 g (9 oz) with attached cabling.
MX1BP Dimensions (Figure 6)
84.3 mm H x 65.2 mm W x 25.7 mm D (3.32" x 2
.
57" x 1.01" )
MX1BP Cable
One 3.6 m (12 ft) 2 conductor shielded output cable with 3-pin male
XLR connector.
Power Requirements
9 V alkaline battery; 8.4 V NiCd rechargeable battery or 9 V Ultralife
®
lithium battery optional; or, from phantom power source, 10 to 52 Vdc
Battery Life (nominal)
600 continuous hours with 9 V alkaline battery
Battery Current (nominal): 0.8 mA
MX1BP Input Connector Type: 4-pin Male Mini Connector (TB4M)
MX1BP Input Configuration: Unbalanced
MX1BP Output Connector Type
3-pin Male XLR
MX1BP Output Configuration
Transformer balanced
CERTIFICATION
Eligible to bear CE Marking. Conforms to European EMC Direc-
tive 89/336/EEC. Meets applicable tests and performance criteria
in European Standard EN55103 (1996) parts 1 and 2, for residen-
tial (E1) and light industrial (E2) environments.
FURNISHED ACCESSORIES
Zipper Bag .......................................................................... 26A13
Foam Windscreen* .................................................... RK261BWS
Snap-Fit Windscreen*...................................................RK183WS
Tie Clip**........................................................................ RK183T1
Dual Tie Clip .................................................................. RK183T2
Battery Powered Preamp.................................................. MX1BP
OPTIONAL ACCESSORIES
In-Line Preamp ..............................................................RK183PK
REPLACEMENT PARTS
Omnidirectional Cartridge ...................................................R183B
Supercardioid Cartridge......................................................R184B
Cardioid Cartidge................................................................R185B
4-Pin Female Miniature Connector (TA4F) ......................WA330
*1 furnished, 4 in replacement kit
**1 furnished, 2 in replacement kit
NOTE:
SHURE, the Shure logo, and MICROFLEX are registered
trademarks of Shure Incorporated. ULTRALIFE is registered
trademark of Ultra Life Batteries, Inc.
