Shure PSM900 IEM 4 Pack Wireless Monitor System


It has a half-rack design and loop outputs. The transmitter also features an LED level meter and an LCD back lit display.

The receiver is made of slim aluminium and features volume and balance controls, as well as a 3.5 mm headphone socket.

The LCD screen allows you to navigate settings and menus. It also works with standard AA batteries.

Professional musicians will appreciate the in-ear monitors that provide high-quality sound and an ideal fit.

The price shown is an average, prices vary by location.


PSM900 from Shre provides professional-quality wireless monitoring systems that provide high-quality audio quality and RF performance in an easy-to-use and durable design.

The system includes a P9T transmitter and receiver, as well as a pair SE425CL in ear monitors. The system includes an enhanced digital stereo encoder, which enhances audio clarity and audio detail, as well as patented Audio Reference Companding. 

CueMode technology, which is patent-pending, allows you to monitor different stage mixes and store up 20 channels on one bodypack receiver.

Scan and Sync creates an IR link between components to facilitate quick and easy syncing. RF muting allows for easy setup and avoids interference.


  • Enhanced digital stereo encoder enhances audio detail and clarity, while patented Audio Reference Companding sounds more like wired audio than other competing wireless systems
  • Patent-pending CueMode technology lets you monitor different stage mixes, as well as store up to 20 different channels on a single bodypack receiver
  • Scan and Sync function creates an IR link between the components for fast and easy syncing
  • RF muting provides easy setup without creating RF interference
  • RF scan and automatic gain features provide excellent RF stability and channel availability, and prevent dropout due to RF overload
  • MixMode technology lets the receiver balance the levels of 2 audio channels while receiving each signal in both ears simultaneously


  • Compact half-rack design for easy transportation and installation in any standard equipment rack
  • Front-panel input gain control and LED level meters
  • 3.5mm headphone jack for convenient monitoring
  • Backlit LCD displays vital info
  • XLR/TRS combo inputs accept a variety of audio sources Loop out connectors make it easy to create multiple mix setups
  • Compatible with the PA421SWB and PA821SWB antenna combiners, and offers front or back mountable antennas


  • Slim and compact extruded aluminum construction for easy placement on a performer and lasting durability
  • Output power is switchable from 10/50/100mW to provide a robust link in any environment
  • Volume and balance controls are provided for easy customization
  • Selectable high frequency EQ boost
  • Audio and RF status LEDs, as well as audio level and battery life metering
  • Operates on a pair of standard AA batteries for 5-7 hours of continuous use
  • Standard 3.5mm headphone jack is compatible with all Shure SCL sound isolating earphones
  • LCD screen displays settings and menus
  • Detachable antenna
  • Included in-ear monitors provide high-quality audio and a secure in-ear fit, ideal for professional musicians

Shure PSM 900 specs

RF Carrier Range: 470-952 MHz
Frequencies Compatible Frequencies: 20 per band
Bandwidth 36-40 MHz (varies by region)
Operating Range 300′ (90 m)
Frequency Response 35Hz – 15kHz
Signal-to-Noise Ratio A-weighted: 90dB (typical)
THD Ref. ±34 kHz deviation @1 kHz: < 0.5% (typical)
Compander Patented Shure Audio Reference Companding
Spurious Rejection ref. 12dB SINAD: > 80dB (typical)
Frequency Stability ± 2.5 ppm
Pilot Tone 19 kHz (±0.3 kHz)
Modulation FM*, MPX Stereo (*ref. ±34 kHz deviation @1 kHz)
Operating Temperature -0.400 to 134.60° F (-18 to +57° C)
Output Power 10/50/100mW, Selectable (Regionally Dependent)
Output Impedance 50 Ohms (RF, Typical)
Connectors 2 x XLR/TRS Combo Inputs
2 x 1/4″ Loop Outputs
1 x DC Power Input
1 x Antenna Connector
1 x 3.5mm Headphone JackPin Assignments
XLR: 1=ground, 2=hot, 3=cold
6.35 mm (1/4″) TRS: Tip=hot, Ring=cold, Sleeve=ground
Polarity XLR: Non-inverting (pin 2 positive with respect to pin 3)
6.35 mm (1/4″) TRS: Tip positive with respect to ring
Configuration Electronically balanced
Impedance 70.2 kΩ (actual)
Nominal Input Level +4dBu and -10dBV, Switchable
Maximum Input Level +4 dBu: +29.2 dBu
-10 dBV: +12.2 dBu
Protection Phantom Power Protection: Up to 60 V DC
Power Requirements 100-15V AC, 415 mA, typical
Dimensions (WxDxH) 7.75 x 6.5 x 1.6″ (197 x 166 x 42mm)
Weight 1.87 lbs (850 g)
RF Tri-Band RF Filtering: -3dB at 30.5 MHz from the center frequency of each band
Active RF Gain Control: 31dB (Adjusts RF sensitivity to provide more RF dynamic range)
RF Sensitivity @ 20dB SINAD: 2.2µV
Image Rejection > 90dB
Adjacent Channel Crosstalk Adjacent Channel Rejection: > 70dB
Squelch 22dB SINAD (±3dB) default setting
Intermodulation Distortion Attenuation: > 50dB
Blocking > 80dB
Output Power 1kHz @ < 1% distortion, peak power, @32Ω: 100mW (per output)
Load Impedance 9.5 Ohms
Tone Control High Boost
Selectable: +2 dB, +4 dB @ 10 kHz
Limiter Selectable: 3-9
Limits volume adjustment knob. Selected value analogous to volume knob increment
Battery Type/Life 2 x AA, Approx 4-6 Hours
Dimensions (HxWxD) 3.89 x 2.59 x 0.9″ (99 x 66 x 23mm)
Weight 7.05 oz (200g) (With Batteries)

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