User manual

True to the Music
®
Radial Engineering Ltd.
BT-Pro™ Bluetooth DI
1
OVERVIEW
A typical direct box is a device that lets you interface an unbalanced audio
output with a professional balanced input, such as those commonly found
on a PA or recording system. The Radial BT-Pro is similar in that it pairs
with a Bluetooth enabled transmit device and converts the streamed
digital signal to balanced stereo analog outputs for connection to any pro
audio device.
Once it is paired with your streaming device, the BT-Pro’s internal antenna
picks up the streaming audio and converts it to an analog signal. A level
control allows you to adjust the output level and a mono sum switch can
be activated to reduce channel count requirements at your mixer or to
check for phase issues. The 3.5mm headphone output can be used to
monitor the stereo signal and test for audio prior to connecting to the PA.
At the XLR outputs, the left and right signals are balanced to drive long
cables without noise, and a ground lift is provided to eliminate hum and
buzz caused by ground loops.
A front-panel level control is used to adjust the volume of the XLR and
headphone outputs. This is variable from a mic-level output to feed a
traditional mixing channel preamp input, or it can be turned up to a line-
level signal to feed the line input on a mixing console, recording system
or powered speaker. The BT-Pro ensures the audio signal is delivered to
the PA as faithfully as possible.
The BT-Pro is easy to setup and use. Once it is powered up by plugging
into the external power supply (included) or by providing 48V phantom
power to the XLR outputs, it will automatically appear as an available
audio destination on your Bluetooth-enabled mobile device — providing
you with a high quality wireless audio link to your sound system.