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    JTS SIEM111 wireless in-ear system 638-662MHz SIEM111-T + SIEM-111R + IE-1 stereo system

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    The SIEM-111 System features reliable JTS UHF PLL technology.


    • There are 961 selectable UHF channels available. As many as 16 sets of SIEM-111T transmitters can operate on the same stage.

    • The system offers 4 groups, with each group having 16 compatible preset channels to choose from. This allows the monitor engineer to set up systems quickly and easily.

    • MPX Stereo Audio Transmission / Reception, switchable to Mono operation if desired.

    • All metal case construction on the SIEM 111R and SIEM 111T.

    • The JTS advanced circuitry assures outstanding signal-to-noise ratio.

    • IE-1 and IE-6 earphones seal off the ear canal with JTS designed Dyna-Driver ear buds which reduce undesired stage noise, ambient sound levels.

    • 3 pairs of different sized Silicon sleeves included with the IE series earphones ensure a right fit for the users ear canal and comfort.


    • SIEM111-T transmitter 

    • SIEM-111R beltpack receiver 

    • IE-1 earphones, stereo system


    Carrier Frequency Range

    • 638-662MHz

    RF Output Power

    • 10 mW

    Nominal Frequency Deviation (modulation)

    • ±40KHz

    Audio Input Impedance

    • 20kΩ 

    Nominal Input Level

    • -10 dBV ; 0 dBV (ATT-10 dBV) 

    Maximal Input Level

    • 10 dBV ; 20 dBV (ATT-10 dBV) 

    LCD Display

    • AF Level, Stereo/Mono, Attenuation Level, Group, Channel, Frequency

    Audio Input Connector

    • 2 x Balanced XLR /Ø6.3mm phone Combo Socket

    Audio Output Connector

    • 1 x 1/8” Stereo Phone Jack

    • 1 x 1/4” Stereo Phone Jack

    Loop Out Connector

    • 2 x Balanced Loop Out Socket

    Switching Power Supply

    • 100-240V Switching power supply



    Input Level Select Switch

    • 0dB / -10dB

    Earphone Output.

    • 60 mW

    Minimum Load Impedance

    • 16Ω

    LCD Display

    • RF Level, Lock-On, Battery Fuel Gauge, Stereo/Mono, HF booster, Dynamic Limiter, Group, Channel, Mute, Frequency

    Output Connector

    • 1/8” Stereo Phone Jack

    Power Supply

    • 2 AA batteries

    Operation Hour.

    • Over 12 hours