JTS SIEM-121T/SIEM-121R Complete UHF Wireless In-Ear Monitoring System

Premium UHF Wireless In-Ear Monitoring System With Stereo & Dual Mono Operation, 300 Metre Range & REMOSET One-Touch Synchronisation – JTS SIEM-121T/SIEM-121R.

The JTS SIEM-121T/SIEM-121R is a complete and professional UHF PLL wireless in-ear monitoring system, comprising the SIEM-121T single channel rack-mount transmitter and SIEM-121R compact body-pack receiver in a ready-to-use package for live performances and productions. Operating across a carrier frequency range of 470–960MHz with a wireless range of up to 300 metres, the system provides reliable and uninterrupted coverage in venues of all sizes. The SIEM-121T transmitter features JTS's exclusive 2.4GHz REMOSET technology, enabling one-touch data synchronisation between transmitter and receiver for quick and effortless setup. Six programmable groups with up to 24 channels per group provide extensive channel flexibility to avoid interference in multi-system environments, and username programming makes identification and management of multiple systems straightforward.

The system can be run in stereo for immersive, full-range in-ear monitoring, or configured for dual mono operation — allowing an additional SIEM-121R body-pack receiver to be added so that two performers can receive independent mono audio feeds from a single transmitter. The SIEM-121R receiver features an updated high-contrast LCD display, digital volume control from -40 to +20dB, an adjustable volume limiter, HF booster, stereo/mono switching and left/right balance adjustment for comprehensive monitoring control in the hands of the performer. The 3.5mm stereo output accommodates standard IEM earphones, and up to 8 hours of continuous operation from two AA batteries — or rechargeable MiNH cells — keeps performers going throughout any event. Both the transmitter and receiver feature rugged all-metal construction for long-lasting durability in demanding live performance environments.

SIEM-121T Transmitter – REMOSET Synchronisation & Flexible Operation

The SIEM-121T is a UHF PLL single channel rack-mount transmitter designed to eliminate the interference and dropout issues that can affect wireless systems in busy RF environments. JTS's exclusive 2.4GHz REMOSET technology enables data synchronisation between the transmitter and receiver at the touch of a button, removing the need for manual frequency matching and making system setup as fast and simple as possible. Dual balanced XLR/6.3mm combo inputs accommodate a wide range of sources, a 6.3mm stereo loop output and two balanced loop out sockets provide flexible signal routing, and a 100–240V switching power supply ensures worldwide compatibility.

SIEM-121R Receiver – Comprehensive Monitoring Control

The SIEM-121R is a compact and lightweight UHF PLL body-pack receiver designed for comfortable wearing throughout extended performances. The updated high-contrast LCD display shows antenna signal, RF and AF levels, battery status, group/channel, frequency and all key system parameters at a glance. Performers have direct control over their monitor mix via digital volume adjustment, an adjustable volume limiter that sets the maximum level range of the volume knob, HF booster for enhanced high-frequency presence, stereo/mono switching and left/right balance adjustment — providing a high degree of personalised monitoring control without relying on the front-of-house engineer.

Stereo & Dual Mono Flexibility For Solo Artists & Groups

The SIEM-121T/SIEM-121R system is equally suited to solo performers and larger stage setups. In stereo mode it provides an immersive, full-range monitoring experience for a single performer, while in dual mono mode an additional SIEM-121R body-pack can be connected so that two performers receive independent mono audio feeds from the same transmitter — making the system highly scalable and cost-effective for bands and ensemble productions. The 300-metre wireless range ensures reliable coverage across even the largest stages and venues.

KEY FEATURES: JTS SIEM-121T/SIEM-121R In-Ear Monitoring System

• Complete IEM System: SIEM-121T UHF PLL single channel transmitter and SIEM-121R UHF PLL body-pack receiver included as a ready-to-use package.
• 300 Metre Wireless Range: Reliable UHF wireless coverage across venues of all sizes with minimal risk of dropout or interference.
• REMOSET One-Touch Synchronisation: JTS's exclusive 2.4GHz REMOSET technology synchronises transmitter and receiver at the touch of a button for fast and effortless setup.
• Stereo & Dual Mono Operation: Run in stereo for a single performer or dual mono for two independent monitor mixes from a single transmitter with an additional SIEM-121R.
• 6 Programmable Groups / 24 Channels Per Group: Extensive channel flexibility for multi-system environments with username programming for easy identification.
• Digital Volume Control -40 to +20dB: Precise audio level management with adjustable volume limiter for performer safety.
• HF Booster & Left/Right Balance: Performer-controlled monitoring adjustments including HF enhancement and stereo balance on the receiver.
• High-Contrast LCD Display: Updated display on the SIEM-121R shows all key system parameters clearly for easy in-use monitoring.
• Up To 8 Hours Battery Life: SIEM-121R operates for over 8 hours from 2 x AA or MiNH rechargeable batteries.
• Rugged All-Metal Construction: Both transmitter and receiver feature durable all-metal housings for long-lasting performance in demanding live environments.
• Transmitter Inputs: 2 x balanced XLR/6.3mm combo inputs, 6.3mm stereo loop output and 2 x 6.3mm balanced loop out sockets.
• Receiver Output: 3.5mm stereo phone jack for standard IEM earphones.
  

Download the user manual here