
318BTS
Phantom Powered Bluetooth®
Stereo Audio Receiver

318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 2

World’s first Phantom Powered Bluetooth® Audio Dongle
318BTS is a low latency, high reliability, rugged dongle, utilizing Bluetooth® 4.0
technology to convert input devices into Bluetooth® enabled devices, using A2DP as a slave
device.
318BTS is designed to be powered by Phantom Power available in most professional
audio consoles, and guarantees that it will work 100% of time without the worries of
charging or maintaining power to the dongle.
318BTS can output stereo or mono merged signal.
With enhanced range, better sound and low latency, 318BTS is the best solution to
connect your Bluetooth® enabled devices to any microphone input.
Simply plug, power and connect, and enjoy high quality audio from any Bluetooth®
enabled device.
Like all Switchcraft® products, 318BTS is built to last, durable, highly reliable, and
fully certified to be used in both; commercial and residential environment.
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 3

USB connector (Bottom side)
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 4

All power sources connected to this equipment
must be separated form mains voltages by double or
reinforced insulation or by basic insulation plus a
grounded shield.
Insert 318BTS into the audio mixer (Mic level),
then connect the audio breakout cable supplied with
the unit and insert the other end into a second
channel on the audio mixer.
Turn ON the Phantom Power supply, a red LED
will start to blink, allow red LED to blink for 30
seconds, or press the reset button using a pen.
Inserting 318BT while the Phantom Power is ON
should be avoided
To skip the waiting period for the 318BTS to be paired,
press the Reset button using a pen, yellow and red LED’s
will blink, allowing 318BTS to pair with other devices.
Connecting 318BTS for the first time
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 5

After 30 sec (or by pressing the reset button),
both Red and Yellow LEDs will blink, this means the
device is ready to be paired, turn on the Bluetooth
connectivity on your device (Phone, PC, tablet
...etc.) and connect to the 318BTS with the name
Switchcraft-XXXXX.
Slide the function switch using a pen to select a
mode as shown.
See “output configuration” for more details
When connected; LED will be lit solid yellow, and
now it is ready to receive audio.
LED indicators summary:
☼ ☼ Red and yellow blinking: ready to connect.
● Solid yellow: connected.
☼ Blinking Red: Looking for paired devices (OR)
lost connection.
Connecting 318BTS for the first time (cont.)
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 6

The 318BTS will find paired devices in the vicinity
and connect to the strongest signal. In regular use;
turn the Bluetooth® ON in your portable device, plug
in the 318BTS, turn on the Phantom Power on your
mixer and the 318BTS will connect to your device
automatically. A solid yellow LED will indicate that it
is connected.
When Phantom Power is not available, the
318BTS can be powered from a regular 5V phone
charger (not included).
Re-connecting 318BTS with paired devices
Avoid powering the 318BT with more than 6V DC.
The audio level is controllable from the source
device, for best results; raise the audio level on your
device to the maximum level.
Auxiliary power.
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 7

Two channel stereo Two channel mono merged Single channel mono merged
Audio configuration
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 8

FAQ’s
Q: Why doesn’t the dongle work when plugged into my mixer?
A: Plugging the dongle when the Phantom Power “ON” may trigger a protection circuit,
remove the dongle from the mixer, turn “OFF” the Phantom Power, wait for 60 seconds
and try again.
Q: Why is the audio output level so low?
A: Raise the volume on your source device (phone, tablet, etc.…).
Q: Why does the dongle have a red LED blinking and I cannot connect to the dongle
though I waited for more than 30 Sec?
A: Continuous red blinking LED is mostly caused by losing connection to the source, for
example if the operator left the room with the phone or tablet and the connection was
compromised, connection can be restored by resetting the 318BTS using the Reset button.
Q: Why doesn’t the dongle work on Phantom Power while working well on USB power?
A: The Phantom Power on your mixer has to be greater than 46.5V, using two channels
can enable the unit to work in even less voltages.
Q: I cannot get a good range! The audio starts breaking with less than 100’ distance!
Why?
A: The human body blocks the high frequency Bluetooth® signal, if you are using a
Smartphone, it is not recommended to put it in your pocket while streaming, also Line-OfSight operation will enhance the range.
Q: Can I connect the Dongle to a Bluetooth® speaker or headphone?
A: No, the unit only acts as “Slave” and can only be connected to a “Master” device
(Phone, tablet, PC...etc.).
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 9

Bluetooth version: 4.0
Maximum output level: -26dBu (Stereo)
Certification: FCC Class B, CE, KC, JRF, ACMA
Frequency band: 2402 to 2480 MHz
DAC resolution: 16 bit
Codec SBC
Paired devices memory 8
A2DP frequency response: 73Hz - 17.5 kHz (ref 1 kHz, ± 3dB)
Working range: Up to 100 ft.
Minimum Phantom power voltage: 40VDC (Two channels)
Rated voltage 48VDC
Rated current 4.6mA
Aux power (Micro USB port): 4-6 VDC
Housing: Anodized aluminum
Connector: Switchcraft® XLR connector
LED indicators: Red and Yellow
Size (without cable): 1.23” x 1.03” x 3.33” (3.15 x 2.62 x 8.45 cm)
Weight (including the cable): 4.37 Oz (124 g)
Operating temperature: -40°C to 85°C
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 10

Industry Canada Radio Standards Specification (RSS) RSS-210
This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following
two conditions: (1) this device may not cause interference, and (2) this device must accept any interference,
including interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de
brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage
est susceptible d'en compromettre le fonctionnement.
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and
maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference
to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power
(e.i.r.p.) is not more than that necessary for successful communication.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une
antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but
de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type
d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité
nécessaire à l'établissement d'une communication satisfaisante
RSSGen and ICES-003
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 11

© 2019 Switchcraft Inc.
The Bluetooth® word mark and logos are registered
trademarks owned by Bluetooth SIG, Inc. and any use of
such marks by Switchcraft® is under license.
318BTS
Stereo Phantom Powered Bluetooth® Audio Receiver
Warranty:
2 years from date of purchase from
Switchcraft’s authorized reseller, Switchcraft
will either repair or replace at their
discretion.
Contact:
5555 N Elston Ave.
Chicago, IL 60630
USA
Phone: 773-792-2700
Fax: 773-792-2129
Email: sales@switchcraft.com
Customer Service hours:
7:30am-4:00pm CST M-F
318BTS Stereo Phantom Powered Bluetooth® Audio Receiver User Manual Rev 0A Page 12