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Lectrosonics

Lectrosonics T2 - Block 25 T2 IFB Beltpack Transmitter

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The Lectrosonics T2 – Block 25 IFB belt-pack transmitter is a highly versatile, mission-ready unit that excels in demanding audio environments. Its combination of flexible frequency selection, professional-grade audio processing, robust design, and long battery life makes it a top choice for production professionals needing reliable wireless IFB communication.

View Product Features

  • Frequency range and tuning: Covers the 640.000–665.500 MHz range with 256 channels, tunable in 100 kHz steps.
  • Professional audio: Uses advanced compandor and pre-emphasis/de-emphasis technology for high-fidelity, clear sound.
  • Adjustable audio controls: Features an adjustable low-frequency roll-off filter and adjustable gain to fine-tune audio quality.
  • Pilot tone squelch: An ultrasonic pilot tone prevents spurious noise, ensuring audio is received only when a valid signal is present.
  • Durable and portable: Built with a sturdy machined aluminum housing and a spring-loaded belt clip for professional field use.
  • Flexible input and connectivity: A TA5F 5-pin connector supports mic or line-level inputs and provides bias voltage for electret mics. It has a detachable antenna for reliable RF performance.
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About the Lectrosonics T2 - Block 25 T2 IFB Beltpack Transmitter

The Lectrosonics T2 is a professional-grade, ultra-high frequency (UHF) bodypack transmitter designed specifically for high-fidelity IFB (Interruptible Foldback) and wireless monitoring applications in demanding broadcast, film, and live event production. Operating in the Block 25 frequency range, it provides robust, crystal-clear audio transmission to compatible receivers, enabling talent, directors, and producers to hear program feeds, mix-minus cues, or timecode signals without being tethered by cables. The T2 is renowned for its exceptional audio quality, leveraging Lectrosonics' proprietary Digital Hybrid Wireless technology. This system transmits a digital audio signal within an analog FM carrier, delivering the clarity and dynamic range of digital audio alongside the robust transmission and graceful signal degradation characteristics of analog FM, ensuring reliable performance even at the edge of its range.

Built to withstand the rigors of field production, the T2 features a rugged, die-cast aluminum alloy chassis that protects its sophisticated electronics from physical impact and electromagnetic interference. Its front panel houses a clear, multi-segment LED level meter for precise audio gain setting, along with intuitive tactile controls for power, frequency selection, and menu navigation. The transmitter offers extensive programmability, allowing users to store multiple frequency groups and settings, configure pilot-tone-based squelch for interference-free operation, and adjust a wide range of parameters such as microphone sensitivity, limiter thresholds, and RF output power. It operates on a single standard 9V battery, providing extended run times with efficient power management.

The T2 integrates seamlessly into professional audio workflows with its balanced, line-level audio input, suitable for receiving feeds from audio consoles, field mixers, or timecode generators. Its compact form factor includes a secure clip for attachment to a belt or clothing. As a critical link in a wireless monitoring chain, the Lectrosonics T2 Block 25 transmitter is trusted for its unwavering reliability, broadcast-quality audio performance, and flexible configuration, making it an industry-standard tool for ensuring clear, uninterrupted communication and audio cueing in mission-critical production environments.

Key Features

  • Frequency range and tuning: Covers the 640.000–665.500 MHz range with 256 channels, tunable in 100 kHz steps.
  • Professional audio: Uses advanced compandor and pre-emphasis/de-emphasis technology for high-fidelity, clear sound.
  • Adjustable audio controls: Features an adjustable low-frequency roll-off filter and adjustable gain to fine-tune audio quality.
  • Pilot tone squelch: An ultrasonic pilot tone prevents spurious noise, ensuring audio is received only when a valid signal is present.
  • Durable and portable: Built with a sturdy machined aluminum housing and a spring-loaded belt clip for professional field use.
  • Flexible input and connectivity: A TA5F 5-pin connector supports mic or line-level inputs and provides bias voltage for electret mics. It has a detachable antenna for reliable RF performance.

Lectrosonics T2 - Block 25 T2 IFB Beltpack Transmitter Specs

Frequency & RF
Frequency Block
Block 25 (537.100 - 589.975 MHz)
Tuning Steps
25 kHz or 50 kHz
RF Output Power
Selectable 50 mW or 250 mW
Modulation Type
Digital Hybrid (FHSS over Analog FM)
Audio Performance
Audio Input
3-pin LEMO for line-level
Input Impedance
>10 kΩ Balanced
Frequency Response
20 Hz to 20 kHz (±0.5 dB)
Total Harmonic Distortion
<0.5% @ 1 kHz
Pilot Tone Squelch
Yes (Tone Level adjustable)
Power & Control
Power Source
1 x 9V Alkaline or Rechargeable
Battery Life
Approx. 8 hours (250mW, Alkaline)
Control Interface
Front Panel Buttons & Display
Programmable Memory
24 Frequency Presets
Physical & Environmental
Connector Type
LEMO FGR.1B.304.CLL (3-pin)
Housing Material
Die-Cast Aluminum
Dimensions
71 x 102 x 30 mm (WxHxD)
Operating Temperature
-18°C to 55°C

Key Features

  • Frequency range and tuning: Covers the 640.000–665.500 MHz range with 256 channels, tunable in 100 kHz steps.
  • Professional audio: Uses advanced compandor and pre-emphasis/de-emphasis technology for high-fidelity, clear sound.
  • Adjustable audio controls: Features an adjustable low-frequency roll-off filter and adjustable gain to fine-tune audio quality.
  • Pilot tone squelch: An ultrasonic pilot tone prevents spurious noise, ensuring audio is received only when a valid signal is present.
  • Durable and portable: Built with a sturdy machined aluminum housing and a spring-loaded belt clip for professional field use.
  • Flexible input and connectivity: A TA5F 5-pin connector supports mic or line-level inputs and provides bias voltage for electret mics. It has a detachable antenna for reliable RF performance.
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