DEITY MICROPHONES

THEOS DIFB TX

Wireless Transmitters

550–960 MHz wideband transmitter, 24-bit/48 kHz digital audio, 6.3 ms latency, 20-preset memory, Bluetooth app control, text-to-speech ID, USB-C power, 17 hr battery life.

$545.00 CAD
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Description

The Deity THEOS DIFB TX is a next-generation wireless in-ear monitor and IFB (Interruptible Foldback) transmitter, designed to meet the needs of professional filmmakers, broadcasters, and audio teams working in dynamic and demanding environments. Built for seamless integration within the THEOS digital wireless ecosystem, this transmitter combines ultra-wideband flexibility, remote setup capabilities, and robust audio performance in a compact, rugged form.

With a frequency range spanning 550 MHz to 960 MHz, the DIFB TX supports Global OneBand™ technology, allowing it to adapt to local RF regulations using GPS-assisted region detection. This enables production teams to work across borders with minimal configuration. The proprietary digital modulation ensures clean, 24-bit audio transmission at a 48 kHz sample rate, while the 700 kHz channel spacing helps maximize spectrum efficiency even in crowded RF environments.

The metal chassis is drop-tested for durability, and user-friendly ergonomics include a metal headphone volume knob, locking 3.5mm output, and a large color display controlled via a rotary encoder with push-to-select functionality. The device supports up to 20 frequency presets, which can be cycled through quickly during production. Unique to the system is Text-to-Speech DID readout, the transmitter can announce its assigned channel name or number through connected headphones, making channel identification simple even without looking at the screen.

Powering the DIFB TX is a high-efficiency battery system that supports up to 17 hours of runtime on a lithium battery, with backup options including alkaline and NiMH. Charging and powering the unit is possible via USB-C, allowing for continuous use during longer shoots or remote applications.

Remote configuration is streamlined with Bluetooth support via the Sidus Audio App, enabling wireless scanning, syncing, and bulk management which is a time-saver for teams working with multiple units across large sets. Whether used standalone or as part of a multi-channel setup, the THEOS DIFB TX delivers reliable, flexible wireless audio transmission with intuitive control and rock-solid performance.

Features

Works with All THEOS DIFB Receivers

Seamlessly transmits audio to any compatible THEOS DIFB unit for easy on-set communication.

Ultra-Wideband Frequency Range

Covers 550MHz to 960MHz for flexible use across global RF environments.

Low-Latency Digital Transmission

Delivers clear 24-bit, 48kHz audio with just 6.3ms latency for real-time performance.

Global OneBand™ Technology

Automatically adapts to local RF regulations using your phone’s GPS.

Bluetooth App Control

Supports Sidus Audio App for remote setup, frequency scanning, and quick adjustments.

Text-to-Speech Channel ID

Transmits channel name to the receiver for clear, spoken confirmation in headphones.

Ultra-Long Battery Life

Offers extended runtime, up to 17 hours with lithium batteries, for full production days.

Preset Library Support

Transmits saved frequency presets to enable fast switching and coordination on set.

Metal Construction

Durable, rugged housing is drop-tested and designed for field use.

Locking 3.5mm Output

Secure audio connection for professional headphones or earpieces.

Mono Headphone Output

Optimized for IFB (Interruptible Foldback) monitoring use.

Compact and Lightweight

Fits easily in pockets or clips discreetly to clothing for talent or crew.

Specifications

General Specifications

Device Type: Digital IFB Transmitter

System Compatibility: Works with THEOS DIFB receivers only (not compatible with THEOS UHF transmitters)

Frequency Range: 550 MHz – 960 MHz (region-dependent)

Channel Spacing: 700 kHz

RF Frequency Steps: 100 kHz

Modulation Type: Proprietary Digital RF Modulation

Audio Transmission Format: 24-bit / 48 kHz

Output Power: Not specified (region-specific; complies with local RF rules via GPS)

Latency: 6.3 ms (standard version) / 11 ms (North American version branded as HUSH Wireless)

Antenna Connector: 50 Ohm SMA

Output Type: Locking 3.5 mm TRS (mono headphone feed)

Audio Output Type: Mono, headphone

Text-to-Speech: DID name readout in headphones

Construction: Metal body, 1-meter drop tested

Display: Large color screen

User Controls: Metal rotary encoder with push-button control

Preset Memory: 20 user-programmable frequency slots

Mobile App Support: Yes (Sidus Audio App for Bluetooth setup, scanning, pairing, and bulk configuration)

Bluetooth Headphone Support: Yes (except North American version)

Power Options:

– Internal Battery: Lithium, up to 17 hours

– Alkaline: Up to 10 hours

– NiMH (1900mAh): Up to 9 hours

– USB-C External Power: Supported

Operational Temperature: –20°C to 45°C

Dimensions (H x W x D): 89.5 mm x 66.8 mm x 20 mm

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