Shure - Microphones - MX183BP/MX184BP/MX185BP Microflex Lavalier

MX183BP/MX184BP/MX185BP Microflex Lavalier

NOTE: This product has been discontinued. Please see MX183, MX184 and MX185.

(Discontinued) Interchangeable omni, cardioid, and supercardioid cartridges and accurate sound reproduction in an incredibly small, unobtrusive lavalier microphone.

Wired Lavalier Microphones with Battery Powered Preamplifier

The Microflex Lavalier microphones bring a new level of sophistication to personal voice reproduction. Like all Microflex family mics, the Lavaliers use interchangeable condenser cartridges, available in cardioid, supercardioid or omnidirectional polar patterns.

Models MX183BP/MX184BP/MX185BP are wired lavalier electret condenser mics designed for speech and vocal pickup. They can be clipped to neckties, lapels, and other articles of clothing. Interchangeable cartridges make it possible to easily reconfigure microphone coverage. The supplied MX1BP battery-powered preamplifier allows use of these microphones when phantom power is not available.

MX183BP - Omnidirectional, w/4-foot (1.2m) Attached Cable, MX1BP Preamplifier, Foam Windscreen, Snap-Fit Windscreen, Tie Clip, Dual Tie Clip, MX1BP Preamplifier
MX184BP - Supercardioid, w/4-foot (1.2m) Attached Cable, MX1BP Preamplifier, Foam Windscreen, Snap-Fit Windscreen, Tie Clip, Dual Tie Clip, MX1BP Preamplifier
MX185BP - Cardioid, w/4-foot (1.2m) Attached Cable, MX1BP Preamplifier, Foam Windscreen, Snap-Fit Windscreen, Tie Clip, Dual Tie Clip, MX1BP Preamplifier

Other Features:

Wide dynamic range and frequency response for accurate sound reproduction across the audio spectrum
Interchangeable cartridges that provide an optimal choice for each application
Rotatable tie-clip that pivots in 90 degree increments for placement flexibility
Supplied snap-fit foam windscreen that controls breath noise and stays on securely
Balanced transformer output for increased immunity to noise over long cable runs
Supplied dual tie clip holds two microphones for dual miking applications
MX1BP preamplifier with Mic Mute/On switch and Power LED. It will operate with either a 9 V battery or phantom power

Spec Sheet (pdf)


Type: Condenser (electret bias)
Frequency Response: 50 to 17,000 Hz
Polar Pattern: 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 to 57 degrees C (0 to 135 degrees F); Storage Temperature Range: -29 to 74 degrees C (-20 to 165 degrees 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 ohms (115 ohms 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 ohm load): MX183BP: 132.8 dB; MX184BP: 138.8 dB; MX185BP: 140.3 dB
Equivalent Output Noise (A-weighted, with 1 k ohm 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 kHz, with 1 k ohm load): MX183BP: 70.3 dB; MX184BP: 64.3 dB; MX185BP: 62.8 dB
Dynamic Range (with 1 k ohm load, at 1 KHz): 109.1 dB
Common Mode Rejection: 45.0 dB minimum, 10 Hz to 100 kHz
Selectable Rolloff Frequency: 100 Hz, with a 12 dB per octave rolloff below this corner frequency.; (Factory Setting: 25 Hz with a 6 dB per octave rolloff)
MX1BP Net Weight: 255 g (9 oz) with attached cabling.
MX1BP Dimensions: 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.; 9 V alkaline battery (Duracell® MN1604 recommended); 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