THEOS digital wireless · IFB receiver

THEOS DIFB

The DIFB is able to listen in on any THEOS transmitter.

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Three THEOS DIFB receivers standing together, antennas up, the screens showing the home screen: DBTX, 915.0 MHz, volume 80

BANK 01 DBTX915.0 VOL 40 TTS ON BATT Lithium 550-960 MHz

Quick look

The DIFB from the front left above: two gold SMA antenna ports, the metal knob and the locking headphone jack on top

Built for the belt

1Dual SMA Ports; True Diversity Receiver
2Metal Headphone Knob
3Locking 3.5mm Headphone Jack
4Metal Body Construction; 1 Meter Drop Tested

Works with any Deity THEOS transmitter^*
Ultra-Wideband Frequency; 550MHz ~ 960MHz
20 Save Slots For Frequency Presets
Bluetooth App Support; Remote Bulk Setup
Bluetooth Headphone Support^*
Ultra-Long Battery Life
Text to Speech DID Read Out in Your Headphones

*Not available on units sold and/or operated in the North America. North American models are a standalone ecosystem.

THEOS DIFB receivers around a THEOS DBTX transmitter, screens lit

film: render

One transmitter

One THEOS transmitter carries the signal.

Any number of receivers

Every DIFB listens in on any THEOS transmitter.

Scan and auto pair

Scan for THEOS transmitters in the area and pair automatically.

Text to speech DID readout

The DID name of the signal, read out in your headphones.

One TX, unlimited RX

One transmitter. Every listener.

The DIFB is able to listen in on any THEOS transmitter. One DBTX on the mix feeds as many DIFB receivers as the production needs: director, client, script, producers and anyone else who has to hear it.

Works with any Deity THEOS transmitter*

*Not available on units sold and/or operated in the North America. North American models are a standalone ecosystem.

1TX

THEOS DBTX transmitter

Unlimited receivers

All THEOS DIFB features

Clean, easy ergonomics

The Deity DIFB features a modern interface with a large color screen that makes navigating the menu and settings easy.

The home screen features the current frequency and volume, controlling which one you are interacting with can easily be switched between by pushing down on the rotatory encoder.

Try the knob

Focus: volume

THEOS DIFB up close

The top of the DIFB: two gold SMA antenna ports, the metal knob and the locking 3.5 mm headphone jack

Dual SMA Ports; True Diversity Receiver

Also on top: the Locking 3.5mm Headphone Jack.

The DIFB on its Bluetooth headphone screen with a pair of matte black earbuds beside it

Bluetooth Headphone Support*

Pair your own Bluetooth earbuds or headphones straight to the DIFB and listen without a cable to the belt pack.

*Not available on units sold and/or operated in the North America.

Metal Headphone Knob

Push to switch between volume and frequency, turn to change it.

Global OneBand™

Beyond Global OneBand™ technology

The Deity DIFB has a tunable ultra-wideband range of 550 MHz to 960 MHz. And by using your phone's GPS, the IFB will conform to local RF rules in different countries.

But beyond our revolutionary Global OneBand™ Tech, the Deity DIFB has the ability to scan for other THEOS transmitters in the area and automatically pair to them. The DIFB is able to listen in on any THEOS transmitter.

Learn more here

Clear: free to use Occupied: a THEOS TX or another signal Local window (GPS), examples

550-960MHz*

Ultra-Wideband Frequency; 550MHz ~ 960MHz

100kHz

RF frequency step

700kHz

Channel spacing

*Frequency Range will vary based on country of operation

Bank library

20 bank library

Sometimes production people need to tune into more than just a single signal. The DIFB is able to store up to 20 different frequencies that you can rotate through via the rotatory knob.

Scroll to turn the knob

Close-up render of the DIFB screen showing the EXIST FREQ bank list: 01 915.0 DBTX, 02 614.0 MIX, 03 648.1 DIRECTOR, 04 652.3 CLIENT

01915.0 MHzDBTX
02614.0 MHzMIX
03648.1 MHzDIRECTOR
04652.3 MHzCLIENT
05603.7 MHzSCRIPT
06671.2 MHzPRODUCER
07696.2 MHzSARAH
08735.1 MHzBOOM
09744.6 MHzCAM A
10745.3 MHzCAM B
11752.8 MHzAGENCY
12787.5 MHzCOMMS
13823.9 MHzLEAD 1
14824.6 MHzLEAD 2
15863.8 MHzTALENT
16808.4 MHzVILLAGE
17902.4 MHzWARDROBE
18918.0 MHzSTAGE L
19925.0 MHzSTAGE R
20926.3 MHzBACKUP

Example presets for illustration. Frequencies and DID names are set per production.

Power

Up to 15hrs of battery life

The DIFB pushes the boundaries with 210% the battery life vs some of the legacy devices.

Run time by battery type

Lithium 15 hrs
Alkaline 10 hrs
1900mAh NiMH 9 hrs

17 h with Deity AA batteries and Bluetooth off (user manual).

The DIFB lying on its back with the battery door open and two AA batteries in the bay

A DIFB held open in a hand: two Deity lithium AA batteries in the compartment, the screen showing the battery type menu with Lithium selected

210%

the battery life vs some of the legacy devices

USB-C

The DIFB also features a USB-C port that can act as an external power port.

Text to speech notifications

Because the DIFB often will be clipped to your belt or in a pocket, you won’t be able to see the screen. So how do you know which preset FREQ you’ve dialed into?

The DIFB will read out the DID name of the signal in your headphones.

Close-up of the DIFB SYSTEM menu with TTS switched on, above SYS RESET, UPGRADE and FIRMWARE

Sidus Audio™

Wireless setup via Sidus Audio app

The app allows you to perform frequency scanning, bank library programing, bulk updating, and frequency coordination.

The remote control feature is especially useful for filmmakers who need to work with multiple devices or those who need to make adjustments to their audio settings quickly. IFB x Sidus saves time.

Learn more App Store Google Play

In the hand

Hands on a wooden table opening the battery door of a DIFB, its antennas up and the home screen lit

The DIFB standing on a wooden table, knob and gold SMA antenna ports on top, the home screen showing DBTX, 915.0 and volume 40

Close-up of the DIFB menu: AUTO SCAN, BANK LIB FILE, DID set to DIFB, and BT

Kits and versions

Three THEOS DIFB receivers with a THEOS DBTX transmitter in front

3 × DIFB + 1 × DBTX

3 pack bundle kit

Need to outfit a production with IFBs? Buy them by the bundle with an included DBTX transmitter and get a discount.

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HUSH Wireless

North American version

Branded in North America as HUSH Wireless.

The RF environment in North America is only getting tighter and folks asked for an option that takes full advantage of small RF blocks like the Guard Band, Duplex Gap, and 941.

Key difference:

400kHz Channel Spacing; Fit 5 channels now in 2 MHz
No Bluetooth Headphone Support; Patent Law Compliant
Latency 11ms; Equivalent to standing 12 feet away from an actor
Not compatible with our THEOS brand UHF system

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Specifications

THEOS DIFB

Output Type: Locking 3.5mm TRS
Output Type: Mono, Headphone
Suggested Headphone Impedance: < 64 Ohms
RF Modulation: Proprietary Digital RF Modulation
Frequency Range: 550MHz ~ 960MHz*
RF Frequency Step: 100kHz
RF Bandwidth: 200kHz
Channel Spacing (Minimum Frequency Interval): 700kHz**
Antenna Connector: 2 x 50 Ohm SMA
Dynamic Range: 105 dBm
Distortion: < 0.5%
DAC Bit-Depth: 24 bit
Transmission Audio: 24-Bit
Sample-Rate: 48 kHz
Latency: 6.3ms**
Battery Type: 2 x AA
Battery Life: 17 h (Deity AA, Bluetooth off)
Dimensions (H x W x D): 82.5 x 64.21 x 19.9 mm
Weight: 105.5 g without battery and antenna
116.5 g with antenna, without battery
148.5 g with battery and antenna
Operating Temperature: -20 to 45 °C (-4 to 113 °F)

*Frequency Range will vary based on country of operation

** The North America model, branded HUSH DIFB, features a channel spacing of 400kHz and 11ms of latency

Data from the THEOS DIFB user manual, measured by Aputure Audio Lab.

Support

Downloads & documents

Product ManualEnglish (10MB)

Firmware - HUSH Wireless

Firmware V1.1 · ZIP file

For older firmware versions, check out our downloads page: HERE

Earbud model based on "Green Earbuds" by Manix3D, Sketchfab, CC BY 4.0, modified.