The Shure Microflex® MX153 is a professional subminiature earset microphone ideal for speech and other applications requiring low-profile discreet placement where improved gain before feedback over lavalier microphones is desired. Delivering exceptional speech clarity, the MX153 is ideal for corporate presentations, houses of worship, A/V conferencing and live sound reinforcement. Additionally, CommShield® Technology offers superior RF immunity from cellular devices and digital bodypack transmitters. Available in three color options and direct TA4F connectivity to Shure bodypacks, the MX153 provides outstanding clarity in an extremely comfortable, over the ear design.
The furnished windscreen provides plosive and wind protection.
When connecting the microphone to anything other than a Shure wireless bodypack, make sure the device provides a regulated +5 V DC (130 µA minimum).
To connect the MX153 earset to an XLR microphone input, use the RK100PK preamplifier (see Optional Accessories).
The RK100PK preamplifier requires phantom power and performs best with a 48 Vdc supply (IEC-61938). However, it will operate with slightly decreased headroom and sensitivity with supplies as low as 11 Vdc.
Most modern mixers provide phantom power. You must use a balanced microphone cable: XLR-to-XLR or XLR-to-TRS.
This microphone features CommShield® Technology for superior RF filtering. For best results in hostile RF environments, always use the RK100PK preamp (see Optional Accessories).
Fit the earset over the ear with the ear support piece placed behind the earlobe. The wire extends over the ear to the tip of the mouth. Adjust the earset with small bends. Do not bend the boom arm beyond 20°.
20 to 20,000 Hz
open circuit voltage, @ 1 kHz, typical
-41 dBV/Pa  (9 mV/Pa)
1 kHz at 1% THD 
|2500 Ω load||107 dB SPL|
|1000 Ω load||107 dB SPL|
@ 1 kHz
|2500 Ω load||73 dB|
|1000 Ω load||73 dB|
equivalent SPL, A-weighted, typical
20 to 20,000 Hz
-18°C (0°F) to 57°C (135°F)
Positive pressure on diaphragm produces negative voltage on pin 3 with respect to pin 1.
+1–5 V DC (500 µA max.)
1 Pa=94 dB SPL
THD of microphone preamplifier when applied input signal level is equivalent to cartridge output at specified SPL
S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
|MX153 accessory kit (3 windscreens, 1 collar clip) Black||RPM153B|
|MX153 accessory kit (3 windscreens, 1 collar clip) Tan||RPM153T|
|MX153 accessory kit (3 windscreens, 1 collar clip) Cocoa||RPM153C|
|4-Pin Mini Connector (TA4F/TQG)||WA330|
Eligible to bear CE Marking. Conforms to European EMC Directive 2004/108/EC. Meets Harmonized Standards EN55103-1:1996 and EN55103-2:1996, for residential (E1) and light industrial (E2) environments.
The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance
Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
75031 Eppingen, Germany
Phone: +49-7262-92 49 0
Fax: +49-7262-92 49 11 4
Note: Information in this guide is subject to change without notice. For additional information about this product, please visit www.shure.com.
SHURE and MICROFLEX are registered trademarks of Shure Incorporated. COMMSHIELD is a registered trademark of Shure Acquisition Holdings, Inc. KEVLAR is a registered trademark of E. I. du Pont de Nemours and Company.