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
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
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