True to the Music
®
Radial Engineering Ltd.
BT-Pro™ Bluetooth DI
2
OVerVIeW
A typical direct box is a device that lets you interface an unbalanced (hi-
Z) audio output with a professional balanced (low-Z) input as found on a
PA or recording system. The Radial BT-Pro is similar in that it pairs with
a Bluetooth enabled device and converts the streamed digital signal to
analog balanced stereo output.
The BT-Pro’s antenna first picks up the streaming audio and converts
it to analog audio. A level control allows you to adjust the output level
and a mono sum switch can be activated to send the mono signal to two
separate audio systems or used to check for phase issues. The 3.5mm
mini-headphone output can be used to monitor the stereo signal and test
for audio prior to connecting to the PA. Before the XLR output, isolation
transformers may be switched into the circuit to eliminate noise caused
by ground loops. The signal is then balanced to drive long cables without
noise.
A front-panel level control is used to adjust the output volume along with
the volume setting for the headphones. This is variable from a mic level
output to feed a traditional mixing channel preamp input to a line level
to feed the line input on a mixing console, recording system or powered
speaker. The BT-Pro ensures the digital signal is delivered to the PA as
faithfully as possible.
The BT-Pro is easy to setup and use. Once it is powered up and the ON
switch is engaged, it will automatically appear as an available device on
your Bluetooth enabled computer, tablet or smart phone.
Summary of Contents for BT-PRO
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