Integrated Acoustic Coupler for In-Ear Monitors

The TM2 is an Integrated Acoustic Coupler for In-Ear Monitors (IEMs) specifically designed for use in the professional sound industry.

Ear simulator “couplers” are the measurement devices used by manufacturers of IEMs for capturing key metrics during research & development, final production, and quality control of IEMs. Using patent-pending technology, the TM2 incorporates the functionality of lab-type testing equipment into an integrated compact package, ideal for live sound and studio engineers who want a simple, yet effective way to test IEM performance.

Monitor engineers are often faced with questions from performers regarding the functionality of their IEMs with no reliably consistent method to test them in their environment. With the TM2 and readily available measurement software such as Rational Acoustic’s SMAART or Studio Six Digital’s Audio Tools, a monitor engineer can easily confirm the functionality of each performer’s IEMs.

With its included adaptors, the TM2 can fit any size of an in-ear monitor. The TM2 can also be connected to an acoustic calibrator for greater measurement precision.


  • Durable, compact, all-metal housing
  • Calibration file included
  • 3-year warranty


  • Live Performances
  • House of Worship
  • IEM Resellers & Service Centers
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  • Specifications
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Transducer Type Pre-polarized condenser
Frequency Response 20 Hz – 20 kHz
Output Impedance 200 Ohms
Sensitivity Nom 6.5mV /Pa @ 1k (sensitivity for each unit included with calibration data)
Maximum SPL 130 dB
Signal to Noise Ratio 68 dB
Equivalent Noise Level 26 dB (A weighted)
Dynamic Range 104 dB
Connector 3-pin XLRm
Power Requirements 24 – 48 V Phantom
Power Consumption 9 mA @ 48 Volts
Polarity Positive pressure produces positive voltage on pin 2 relative to pin 3 of output XLR connector
Materials / Finish Precision machined brass and aluminum / Nickel plating and anodizing
Weight (without adapters) 189 g
Dimensions 56.64 mm diameter
Download Spec Sheet

1x TM2
4x Adapters: (1 x) small-tip, (1x) large-tip, (1 x) custom-tip, (1 x) ear simulator
1x CASETM2 – Protective Carrying Case
3x Additional Foam Seals for the custom-tip adapter