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HomepageCables & AccessoriesD.I. › Radial Engineering BT-Pro
Radial Engineering BT-Pro

The BT-Pro is a Bluetooth direct box designed to capture the wireless transmission from a Bluetooth enabled device and convert the signal to a balanced line.

It employs an innovative T-shaped access cavity behind which is located the antenna. This is protected by a milled insert made from Sintra® - a rugged closed-cell PVC - that permits the wireless transmission signal to pass without interference, allowing reception distances of 12 meters (40') or more with line of sight between devices.

The audio signal path itself employs the latest Bluetooth wireless A2DP interface over 2.0 EDR (Enhanced Data Rate) for higher speed transmission to deliver optimal audio quality. This standard employs a 16-bit wireless compressed format with the actual bit rate determined by the transmission source material. Inside, the BT-Pro converts the data to a stereo analog signal, producing up to +4dB at the output. The signal level is controlled by a front panel potentiometer that is shared with the built-in headphone amp with standard 3.5mm mini TRS that is used for troubleshooting. For greater flexibility, a stereo-to-mono switch sums the stereo output for dual-mono operation to reduce input channel requirements on the mixer or to share the signal between separate systems. Should noise be encountered, two side-mounted isolation transformers may be inserted into the signal path. This is supplemented by a ground lift switch for the XLRs to further help eliminate hum and buzz caused by ground loops.

Connecting to the BT-Pro is easy. The BT-Pro is powered by an external 5V supply via a mini USB port and may also be powered from a laptop or USB hub. Once turned on, two top-mounted LEDs will toggle as it awaits pairing. Turn on your Bluetooth device and its transceiver sends an initial pairing message to identify the BT-Pro. This will show up as 'RadialEng'. A connection pass code is then used to initialize the connection. This important safety feature ensures other nearby Bluetooth devices cannot 'pollute or hijack' the system. Once paired, the BT-Pro's blue LED will flash every 3 seconds to let you know the two Bluetooth devices are talking to each other.

The Radial BT-Pro... a wireless DI made for professional touring.
  • Bluetooth reception to 12 meters (40 feet!)
  • Dual balanced XLR outputs to connect to PA system
  • Built-in headphone amp for troubleshooting
  • Isolation transformers to eliminate buzz and hum
  • Specifications
    Audio circuit type: Bluetooth A2DP Transceiver with Audio Line Drive
    Bluetooth compliance: Bluetooth 2.0 W/EDR
    Data compression: SBC Codec
    Compatibility: All Bluetooth A2DP compliant devices
    Frequency response: 20hz - 20Khz
    Dynamic range: 90dB
    S/N: 96dB
    Maximum gain: +8dBu (source file dependant)
    Total Harmonic distortion: 0.01%
    Stereo separation: 75dBu
    Output impedance: 300 Nominal

    Audio output: Stereo balanced mic level (2 x XLR-M)
    Headphone Output: 3.5mm TRS
    Level control: Variable, Works on Headphone and XLR
    Transformer isolation: Independent for each channel
    Mono switch: Sums left and right channelsl
    Ground lift: Lifts pin 1 on both XLR Outputs

    Power: USB Mini connector (power only)
    Finish: Durable powder coat
    Size: 3.3" x 5.0" x 2" (84 x 127 x 48mm)
    Weight: 1.5 lb (680 kg)
    FCC approval: Complies with section 15 of the FCC Rules
    Conditions: For use in dry locations only between 5°C and 40°C
    Free shipping in Canada. Conditions
    Additional information
    For more information about the BT-Pro, please visit the website of Radial Engineering
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