The DEITY THEOS DIFB is a professional wireless IFB (Interruptible Foldback) system crafted for demanding film and television production environments. Designed with a full metal housing, it offers durability without compromising on portability. Its compact build and intuitive design make it easy to carry, install, and operate on set.
This unit delivers reliable, stable wireless audio transmission with strong anti-interference performance, making it well-suited for multi-user setups and busy RF environments. The system features a 3.5mm headphone output and supports a wide range of Bluetooth headphones for cable-free monitoring. It also integrates seamlessly with the Sidus Audio app for remote configuration and control.
User interaction is made simple with a combination of dedicated buttons and a rotary push-knob. From scanning for available frequencies to adjusting volume levels, each function is straightforward. An automatic frequency scan mode helps identify clean channels and allows you to sync them directly to transmitters, minimizing interference. The system can store up to 20 user-defined frequencies, which can be named, reordered, or deleted as needed using the menu interface.
Bluetooth monitoring is easy to set up. Once paired, compatible headphones allow for real-time wireless listening. The system also offers options to view and manage previous pairings, making reconnection quick and efficient. For added flexibility, you can toggle between enabling Bluetooth headphone monitoring and app control.
Battery life is strong, with support for various AA battery types, including alkaline, lithium, and NiMH rechargeable batteries. On average, the system runs for about 17 hours on a fresh set of DEITY AA lithium batteries. A power-saving ECO mode is available, which dims the screen and reduces power draw during long sessions.
The DIFB interface is highly customizable. Users can set screen timeout durations, adjust LED brightness, and even assign specific functions to the rotary knob. Additional options include system resets, firmware upgrades via USB, and language selection between English and Simplified Chinese.
In terms of compatibility, the DIFB supports popular Bluetooth headphone models from Apple, Huawei, JBL, Edifier, and more. The full list is detailed in the manual, ensuring confidence when selecting headphones for on-set use.
Overall, the DEITY THEOS DIFB offers a professional-grade solution for IFB audio monitoring. Its combination of rugged hardware, thoughtful interface design, and Bluetooth capabilities makes it a reliable choice for directors, crew members, and audio professionals who need consistent, high-quality monitoring throughout production.